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# Ltspice Counter

A Qwiic Upgrade for a DIY Keyboard. i want a binary output from counter, as expected i am currently getting an output in the form of waveforms. Monte Carlo and Worst-Case Circuit Analysis using LTSpice SPICE is a handy tool for evaluating circuits without having to first breadboard them, and through its "directives," it provides a powerful method for analyzing how a circuit might perform with components exhibiting real-world tolerances. 1 review for 4 bit Asynchronous Counter with J K Flip Flop oshilan – February 12, 2012. This LTspice Tutorial will explain how to use LTspice ®, the free circuit simulation package from Linear Technology Corporation (LTC) (www. Initially set up a count value to zero. Enter pin-numbers in all schematics, it will help you later when you connect the circuits on the board. The 74HC193; 74HCT193 is a 4-bit synchronous binary up/down counter. From the excitation table. IC 4060 is an excellent integrated circuit for timing applications. The frequency of which is a linear function of a controlling. Symbols of Electronic Sensors, Transducers, Detectors The transducers, sensors and electrical and electronic detectors are elements activated by the energy delivered by a system and that in turn deliver another type of energy to another different system. LTspice is generally more geared towards simulating analog circuits. In this circuit the MOSFET converts variations in the gate-source voltage into a small signal drain current which passes through a resistive load and generates the amplified voltage across the load resistor. As with other sequential logic circuits counters can be synchronous or asynchronous. LTspice - need help tuning NCP1395 parameters. Joe Geller, Whitesboro, NY Now, turning from Ohms to Farads, charging a capacitor with a constant current is particularly convenient, symbol move towards full scale as the capacitor charges with the “beep” sounding at the high 3 DMM Ohmmeter constant current and full scale voltage values, Joe Geller, July,. During simulation of behavioral model, all the flows defined by the ‘always’ and. Visualizza il profilo di AMIRHOSSEIN MOALLEMI su LinkedIn, la più grande comunità professionale al mondo. e sequential circuits in LTSpice. Quadrature decoder. In the circuit, IC 4060 is a standard frequency generator with quartz crystal. , 1 percent or 5 percent). As we know LTspice is free but we schuld buy Pspice too expensive. This LTspice Tutorial digs deeper into circuit analysis with LTspice ®. For individual use only. You choose the parts values, inductance and capacitance, to get those reactances at whatever frequency you are operating at. The most significant bit would change from 0 to 1 and the least significant bit would change from 1 to 0. LTspice is generally more geared towards simulating analog circuits. CD4022B : Divide-By-8 Counter/Divider With 8 Decoded Decimal Outputs. If the CPD clock is pulsed while. 15, McGraw-Hill, 2001. Digital Circuit Simulation with Pspice A/D D. Overview Counter Strike Pobierz is a Shareware software in the category Miscellaneous developed by Counter Strike Pobierz. These all statements are contained within the procedures. For example, for a 1 kΩ pot with the wiper adjusted 1/4 turn from the CCW end (WP = 0. Basic Circuit Simulation with LTspice July 30, 2015 by Trevor Gamblin LTSpice is a versatile, accurate, and free circuit simulator available for Windows and Mac. Study of. Sensing the amount of current passing through any circuit can be useful in a lot of applications. Presettable Counter Using Ic 74192. Explore the cost of living and working in various locations. Learn what employers are paying for jobs you're interested in. 概要 LTspice の使い方 (部品の追加) はじめに LTspice は非常に便利に、回路のシミュレーションを行ってくれる。 しかし、どうも部品が足りない。 実際のところ「秋月」「千石」あたりで入手可能な部品で回路は作. The adjustment period with C2, and counter circuits within the IC 4060 will be only 2 Hz frequency dividing out the pin 3. They will start after the break and are to be done in the same way as the usual lab experiments, but using LTspice. SPICE Simulation Part 1: The Basics of SPICE and How It’s Integrated into Autodesk EAGLE. Aug 15, 2016 #1 Attached are LTspice simulation model files I made for this popular IC. Colpitts Oscillator. Shows the usage of basic gates like AND, OR, XOR and NOT. Free Online Engineering (Javascript) Calculator to quickly estimate the Component values used for a 4046 VCO with PLL. The electrodes have a high voltage across them. LTspice AkaiKKR machikaneyama Scilab KKR PSoC 強磁性 CPA OPアンプ PIC ecalj 状態密度 常微分方程式 モンテカルロ解析 トランジスタ ode DOS インターフェース PDS5022 定電流 スイッチング回路 分散関係 半導体 シェルスクリプト 乱数 レベルシフト 確率論 HP6632A トランジスタ. EMF Equation of transformer can be established in a very easy way. A carry look-ahead adder reduces the propagation delay by introducing more complex hardware. Welcome to Futurlec. Learn what employers are paying for jobs you're interested in. LTspiceIV/ BTW per "vederle" devi far ripartire LTspice ! Dimmi se sei riuscito. Johnson counter is also called as Inverse feedback counter or twisted Ring counter. Each of the procedure has an activity flow associated with it. IC 4060 is an excellent integrated circuit for timing applications. com in the spotlight. The 74HC193; 74HCT193 is a 4-bit synchronous binary up/down counter. AMIRHOSSEIN ha indicato 2 esperienze lavorative sul suo profilo. Audio is generally AC. Building a Binary Counter with a JK Flip-Flop By Patrick Hoppe. This isn't a very complex state transition diagram, but it does require that internal bits (in my case, just 4 bits) get set to either 0 or 1 based on the output of a comparator. Included in the download of LTspice are macromodels for a majority of Analog Devices switching regulators, amplifiers, as well as a library of devices for general circuit simulati. If you want the counter's output being displayed as e. I made sure it points to a TLV271. Press button, get result. Ask Question Asked 4 years ago. txt file into the library/ies. You can also do this on the bench if you have a suitable VFO and an RF millivoltmeter or oscilloscope, and a frequency counter. But there's a snag. I found a way in LTspice that you can simulate several signal drive levels to give various output waveforms. The difference between the rad and rem is that the rad is a measurement of the radiation absorbed by the material or tissue. 555 Timer: This tutorial provides sample circuits to set up a 555 timer in monostable, astable, and bistable modes as well as an in depth discussion of how the 555 timer works and how to choose components to use with it. Nexperia 74HC590 8-bit binary counter with output register; 3-state 7. For more information of Verilog, go to: How to Use Verilog HDL Examples. How to Use a Chip Vendor Op-Amp Model in LTSpice: IntroductionLTspice is a free SPICE simulation software tool with schematic capture, waveform viewer, and many enhancements that runs on both Windows and Mac OS X. Won Cyber games event in CS(Counter strike) in an intra univeristy competition. Solution: Step 1: Since it is a 3-bit counter, the number of flip-flops required is three. Enginursday: A New Sensory Experience with the Cthulhu Shield. Get it as soon as Tue, Feb 4. I am playing around in LTspice simulations and am new to IGBT stuff. Before I start testing a new idea for an electronic circuit and building it on a breadboard, I usually want to check it with LTspice. The problem is you would need a model that is accurate in SPICE. The flexible pulser allows programmable amplitudes and offsets ( +/- 5V) and programmable widths down to 300 picosecond. Performs digital write, digital read, and PinMode for pins 0-53. com reviews. Copy the model into the LTSpice sub directory. To find the component your looking for, either search by Part Number or visit the relative department. I would say it is not a fixable problem, given the state of some models. Separate up/down clocks, CPU and CPD respectively, si mplify operation. Spiceworks collects and uses limited personal information about you to be a part of our Community and to use our Tools & Apps. The directory is typically: C:\Program Files\LTC\LTspiceIV\lib\sub. When it reaches "1111", it should revert back to "0000" after the next edge. The basic principle is to sample the switch signals and filter out glitches if any. com reviews. 1000 Threads found on edaboard. Favorited Favorite 1. In simulations, if i change the input AC voltage below 130VAC i am not getting the startup and unable to see the resonance effect during IGBT off. com CD4040BC, DCD4060BC Rev. 74160 : Synchronous 4-Bit Counter. Nearly all circuits that you simulate need a voltage source of some kind. Illustrated in Fig. For the amplifier below determine the variation of Ai and Rin if B varies from 50. This component is called "e" in the symbol library. Likewise, if I follow the instructions for using the SRFLOP symbol, applying a high on the "R" pin causes Q to go high. No liability is accepted for any consequences of using information on Testips. Some prefixes are also used in digital communications and computer technology but they have a slightly different value because they are based on a power of 2. Oscillator generator. We assume that we have available an "oversampling clock" (named "clk" in this page) that is faster than the quadrature signals. LTSpice Library Files. 25 kΩ and R1B = 0. This might be counter-intuitive at first,. Also see Voltage Comparator Circuits. 7-segment Display Counter. The output of the IC2 in the circuit was wired to the 7 segment a,b,c. Downloads discussed in the magazine are free, but you do need to create an account. Hello everybody, i have figured out that LTspice uses a different model description when compared with Texas Instruments opamps. A Qwiic Upgrade for a DIY Keyboard. If a new line is selected, the program will continue from that point. This is of particular importance for integrated circuits. LTSpice Library Files. Ask Question Asked 4 years ago. Please consider donating to help us continue to serve you. Then use a logic switch. Performs digital write, digital read, and PinMode for pins 0-53. Watch the Youtube videos to see these shields in action. R s is the load impedance placed in the source circuit. W3JDR 's LTSpice NE602/SA612 Here's something we've needed for a long time: an LTSpice model for the ever-popular NE602/SA612 chip. Welcome to Futurlec. This flux links with both primary and secondary windings. The tutorial for LTSpice is modified from this one, so if you found the layout of this one useful, you will probably find the LTSpice tutorial easy to follow. These instructions are designed only to help you get started. Decade Counter Binary Counter Asynchronous Clear HD74HC160P HD74HC161P Synchronous Clear HD74HC162P HD74HC163P. The advantage of this circuit is, it can be used to drive stepper motors having 2-10 steps. - Developed a counter using 7447 BCD to 7-segment display decoder and, 7490 decade and binary counter with soldering performed on a copper board. The photodiode is reversed biased where the Cathode goes to a positive voltage and th Anode goes to the negative side of the supply. This isn't a very complex state transition diagram, but it does require that internal bits (in my case, just 4 bits) get set to either 0 or 1 based on the output of a comparator. And this is the response in LTSpice for the 20m filter: Quite a nice response and sharp cut off, with a little bit of ripple in the passband. It's very important to understand the current direction convention LTspice is using for various components, as will be demonstrated below for other current sources, voltage sources, components with only two terminals, and components with more than two terminals. February 13, 2020. At equilibrium, the charge lost through R1 for each input cycle exactly equals the charge on C1. This LTspice Tutorial will explain how to use LTspice ®, the free circuit simulation package from Linear Technology Corporation (LTC) (www. (on LTspice and CADENCE). This isn't a very complex state transition diagram, but it does require that internal bits (in my case, just 4 bits) get set to either 0 or 1 based on the output of a comparator. Using shift registers. Successive approximation register [SAR] * An appropriate constraint should be given PART - B VLSI Lab Manual VII sem, ECE 10ECL77. LS7083 & LS7084 Encoder to Counter Interface Chips The maximum time delay from the A or B input to the leading edge of any output is 235ns. Contact Details of Exam Unit. Download CEDAR Logic Simulator for free. Thanks for detailing exactly how that's done. LTspice_Manual. View Anum Ahmed Pirkani’s profile on LinkedIn, the world's largest professional community. Intermediate LTSpice Tutorial August 04, 2015 by Trevor Gamblin LTSpice possesses several features that can be used to test your design beyond simple transient analysis and AC sweeps. The video helps you in adding a custom Digital Logic Components in LTSpice to simulate basic digital combinational and sequential circuits. Typical rise or fall time of each logic output 10 to 20ns. CD4022B : Divide-By-8 Counter/Divider With 8 Decoded Decimal Outputs. Ask questions, explore solutions, and participate in discussions with other NI Community members. LTspice Tutorial: Part 3. That is too short for low frequency signals. I think Linux Mint isn't just a great desktop, it's a great replacement for Windows. Hello I'm using a counter with the reset pin as described on the LTWiki "undocumented" page. purity with about a 20 dBc down on the 3rd harmonic, 27 dBc down on the 5th. LTspice_Manual. PSpice is an acronym for Personal Simulation Program wi. As with other sequential logic circuits counters can be synchronous or asynchronous. Oscillators are broadly classified into two – linear oscillators and non-linear oscillators. Please click on menu File—Save, you will see popup window, please select the directory you created just now, for example, c:\john on C: drive. LTSpice: Binary Up/Down Counter. Here is the list of Best Free Circuit Simulation Software For Windows. The following graph shows the frequency response of the circuit shown above, generated using the AC analysis simulation in LTspice, over the frequency range 1 Hz to 10 kHz. com 4 UG933 (v1. IC 4060 is an excellent integrated circuit for timing applications. LTSPICE RCX simulation netlist of one layout. Included in the download of LTspice are macromodels for a majority of Analog Devices switching regulators, amplifiers, as well as a library of devices for general circuit simulation. SPICE Simulation Part 1: The Basics of SPICE and How It's Integrated into Autodesk EAGLE. Monte carlo is an analysis method used by design engineer to increase the robustness and reliability of their products. Mon Jul 30, 2007 1:40 am. Simulations to run are as follows:. General Navigation. With Windows security problems such as WannaCry, people are. Johnson counter is also called as Inverse feedback counter or twisted Ring counter. The 74HC193; 74HCT193 is a 4-bit synchronous binary up/down counter. LTspice is generally more geared towards simulating analog circuits. It performs lots of processes including the following: It steps through the program line by line. Onforu 33ft LED Strip Light, 10m Dimmable Tape Light, 3000K Warm. asc Test file. The switching circuit is driven by a PWM waveform from an ESP8266 I/O pin. com: Bcd Counter Design Matching the biasing circuit to the core amplifier Hello friends, below is an example of folded cascode ampliifer, you see transistors M2-to-M10, these transistors are biased with VB1-to-VB4. A practical example of a voltage controlled oscillator (VCO) is the LM566. The RC filter composed of R1 and C2. I only find "the Maximum time stemp seting", but I want to set a specific ''time step", not the maximum time step. All the information I find seems to say that the 4000 series. Generally, counters consist of a flip-flop arrangement which can be synchronous counter or asynchronous counter. What has this got to do with a frequency doubler you may ask. Use LTSpice to model desired circuitry, and confirm that designed circuit solves the defined engineering problem. It covers mainly the 8051 family of micro-controllers starting with the basic architecture and then moves on to assembly language and Real-Time Operating System (RTOS) where three main types of self-developed RTOSs are discussed (with full source code listing). When it reaches "1111", it should revert back to "0000" after the next edge. LTSpice Library Files. It has 188 power on count and 896 power on hours. I would say it is not a fixable problem, given the state of some models. dch) Maybe the occasional PIC micro code written in C or Proton Basic. CD4022B : Divide-By-8 Counter/Divider With 8 Decoded Decimal Outputs. SPICE (any flavor of it) is an analog simulator. Determine: A ohm i Ai and R in for the simplified amplifier shown below. I am interested in using the LTspice. Pulse Shaping and Signal-to-Noise Ratio Pulse shaping affects both the • total noise and • peak signal amplitude at the output of the shaper. "Die importierten LTspice-Bilbiotheken mÃ¼ssen im Unterordner. 以下は参考に、各モーターメーカー様のCWとCCWのご説明です。 引用：三菱電機様. There will be no image posted since all the files can be downloaded as a single archive and browsed with LTspice, directly. CD4029A : Presettable Up/Down Counter. These all statements are contained within the procedures. LTspice is installed on all lab computers and in A&EP computer room • Supplement Part 2 contains LTspice experiments. This video will help you learn some of the undiscovered talents of the LTspice voltage source. This isn't a very complex state transition diagram, but it does require that internal bits (in my case, just 4 bits) get set to either 0 or 1 based on the output of a comparator. I included my simulation results below that clearly shows each of these operations occurring. Thus constructing a Motor Speed Control system. 35 um CMOS model library for LTspice. This article will go over a few advanced functions. In LTSpice there will be DC and AC circuit simulation, Transient and AC analysis exercises. Timing Diagram Notes: LS7083 Timing. You can create new symbols, both as functional or non-function parts or even edit the existing symbols. LTSpice simulations (asc) Images (. For each table, you have 100 counters. There are lots of programs for simulating digital circuits, for example Xilinx ISE. 1 \$\begingroup\$ I'm an absolute beginner with LTSpice; my first test circuit uses a few D flip-flops: four of them as clock dividers (to divide the clock frequency by 16), and then 3 as delay blocks (to delay the f/16 signal by three clock. LTspiceについて質問です。LTspiceにナショナルセミコンダクタ社のタイマIC：LMC555を追加したいのですが、やり方が全く分かりません。電子回路のシミュレータについては全くの初心者です。わかりやすく教えてください。よろしくお願いします。. LTSpice simulation files for the Tech Notes article on “ Outphasing Modulation of High Efficiency Amplifiers. It may take less than a minute on a hotter PC. Whether you’re a student or professional, SPICE will allow you to predict the behavior of your electronic circuits accurately. The ELECTRONIC COMPONENTS Superstore. To control the speed of the motor, the average value of the PWM pulse is controlled by a switch. The flip flop to be used here to design the binary counter is D-FF. 10137 : 4-Bit Universal Decade Counter. By studying the material on this site and the LTspice group, and contributing as much as possible - then posing well thought out questions to the LTspice group as needed, you will be able to use LTspice to any depth you wish. Thermal capacity is modeled by their electrical counter part, capacitors-Ws/°C. Thank you, --. only components I found there, were some standard BJTs from 70's, and a 555 counter. Ltspice Files Ltspice Files. It has an EEPROM memory of 1KB and its SRAM memory is of 2KB. Consider the 555 timer monostable circuit below. CEDAR LS is an interactive digital logic simulator to be used for teaching of logic design or testing simple digital designs. The 400V is needed for the Geiger-. LTspice comes with a wide range of symbols. com DM7474 Dual Positive-Edge-Triggered D-Type Flip-Flops with Preset, Clear and Complementary Outputs Physical Dimensions inches (millimeters) unless otherwise noted (Continued). Limiting values [1] The input and output voltage ratings may be exceeded if the input and output current ratings are observed. LTspice AkaiKKR machikaneyama Scilab KKR PSoC 強磁性 CPA OPアンプ PIC ecalj 状態密度 常微分方程式 モンテカルロ解析 トランジスタ ode DOS インターフェース PDS5022 定電流 スイッチング回路 分散関係 半導体 シェルスクリプト 乱数 レベルシフト 確率論 HP6632A トランジスタ. What has this got to do with a frequency doubler you may ask. gz: LM317 voltage regulator(s) using different SPICE models: 555_examples_prj. This tutorial is going to show you how to install Wine on Linux Mint 19. What is bootstrapping circuit? Within an integrated circuit a bootstrap method is used to allow internal address and clock distribution lines to have an increased voltage swing. Get Back to Design. If the CPD clock is pulsed while. The detection unit, on the other hand, converts the current signal through the working electrode into a voltage signal. Powell and Bryce Hesterman Better technology. It covers mainly the 8051 family of micro-controllers starting with the basic architecture and then moves on to assembly language and Real-Time Operating System (RTOS) where three main types of self-developed RTOSs are discussed (with full source code listing). An up/down counter is written in VHDL and implemented on a CPLD. jelib with modulo_10_counter, modulo_200_counter, modulo_1000_counter layout and simulation code Improved layout of basic cell(s). Here's out top tips. However if you are into how MOSFET work, I will share some useful academic articles and resources at the end of this post. Whether you're plugging parts into a breadboard, soldering them to a PCB, or sewing them into an e-textile project, it's critical to be able to identify polarized components and to connect them in the correct direction. in a part of my project i need to write about differences between this two softwares. Mon Jul 30, 2007 1:40 am. a hex code, this is beyond the capabilities of LTspice. The RC filter composed of R1 and C2. exe for free. Joe Rocci, W3JDR, developed this one back in December. Please consider donating to help us continue to serve you. Besides your personal information, we may collect and use job title, company, and related business information. LTspice is node unlimited, incredibly easy to learn and can be used to simulate most of the analogue components from Linear Technology as well as discrete and passive components. For the analysis a transient pulse with a pulse width of 10 seconds was used. K4ghg Ham Radio 2020 Software Collection* - $6. ac directive • The details of setting an AC simulation involve two steps:. Paul Hesketh used a Teensy 3. ” Mike Hamel. /lbr/ltspice/. In this circuit the MOSFET converts variations in the gate-source voltage into a small signal drain current which passes through a resistive load and generates the amplified voltage across the load resistor. 555 Timer: This tutorial provides sample circuits to set up a 555 timer in monostable, astable, and bistable modes as well as an in depth discussion of how the 555 timer works and how to choose components to use with it. The symbols listed in this handbook were collected after much research by the Technical Staff of Cleveland Institute of Electronics, Inc. com's explanation ) I coded up the generation of one in MATLAB. I have decided to order their 17m filter and use this in my RFMETER design to filter the Si5351 DDS output and remove higher harmonics. During simulation of behavioral model, all the flows defined by the ‘always’ and. The Fender Modern Player Telecaster Plus is a fantastic value and the craftsmanship is very impressive with this guitar. Introduction to OrCAD Capture and PSpice Professor John H. 1 Introduction. The 74HC193; 74HCT193 is a 4-bit synchronous binary up/down counter. Il est en revanche facile de les récupérer sur internet via le groupe Yahoo dédié à LTSpice. But i have gone to adjust this in a very different way. Building a Binary Counter with a JK Flip-Flop By Patrick Hoppe. The frequency of which is a linear function of a controlling. Appetizers Basics Biriyani Bread & Cakes Chaat Chapathi Gravy Chicken Chutneys Cookies Desserts dinner Dry dish Gravy Italian Kerala cooking Noodles Onam. 図4のようにt-ffをポジティブエッジトリガにしてみます。 クロックのl→hの変化で出力が反転しますので、リセット後の最初のクロック入力ですべての出力がhとなり、クロックが入る毎にダウンカウントしていきます。. CD4029B consists of a four-stage binary or BCD-decade up/down counter with provisions for look-ahead carry in both counting modes. CD4040BC, 12-Stage Ripple Carry Binary Counters CD4060BC, 14-Stage Ripple Carry Binary Counters May 2007 ©1987 Fairchild Semiconductor Corporation www. The inputs consist of a single CLOCK, CARRY-IN\ (CLOCK ENABLE\), BINARY/DECADE, UP/DOWN, PRESET ENABLE, and four individual JAN signals, Q1, Q2, Q3, Q4 and a CARRY OUT\ signal are provided as outputs. Thread starter Alec_t; Start date Aug 15, 2016; Search Forums; New Posts; Thread Starter. If Possible Model in LTSpice. Integer Constants. The following is a design tool which calculates the parameters for a buck converter, boost converter or Buck-Boost Converter - (Step-down/Step-up or inverting). Comparing. Use as many XOR-gates as you need. Aug 15, 2016 #1 Attached are LTspice simulation model files I made for this popular IC. Some complete projects designed by self. LTspice est basé sur le moteur de simulation SPICE, dont les débuts remontent aux années 1970, et qui était alors développé au Electronics Research Laboratory de l'université de Californie, Berkeley. Labs are open Monday through Thursday from 8 a. Compared to the asynchronous device, here the outputs changes are simultaneous. Thermal capacity is modeled by their electrical counter part, capacitors-Ws/°C. LTSpice and Lab Orientation - Instruments and Measurements In this experiment, the student will become familiar with basic circuit implementation in LTSpice and with using the lab equipment to be utilized throughout this course. sub extension and not a *. Remember - The$ 30. Oscillators are broadly classified into two – linear oscillators and non-linear oscillators. Latest Blog Posts see all blog posts. Selection of Counter design: The chosen design for the 4-bit counter is a simple 4-bit synchronous counter with synchronous set and. of the system-°C/W. 54L93 : 4-Bit Binary Counter. You are also encouraged to join the LTspice Group. Before I start testing a new idea for an electronic circuit and building it on a breadboard, I usually want to check it with LTspice. Each optocoupler consists of gallium arsenide infrared LED and a silicon NPN phototransistor. Contact Details of Exam Unit. Components can be selected in two ways. The always construct, highlighted in red text, describes how the counter should behave. The file must be given a *. The difference this time is that the two transistors have been replaced by the 555 timer device. AMIRHOSSEIN ha indicato 2 esperienze lavorative sul suo profilo. Computer Science and Artificial Intelligence Laboratory. Most users ever online was 23,632, 30th June 2019 at 05:00 PM. Basically it consists of a pair of electrodes surrounded by a gas. is there a way to directly get binary data at the output. The F2 key will give access to all the components in LTspice, frequently used parts like the resistor,capacitor, inductor and ground symbol can be selected from the top menu line. Counts down to 0 and then wraps around to a maximum value. 2020 + Portable + Mac نام نرم افزاری قدرتمند و شناخته شده در زمینه طراحی و محاسبه مدارهای الکترونیکی مخصوص دانشجویان و مهندسین رشته برق است. A ring counter is a type of counter composed of flip-flops connected into a shift register, with the output of the last flip-flop fed to the input of the first, making a "circular" or "ring" structure. LTSpice: Binary Up/Down Counter. 15, McGraw-Hill, 2001. SPICE simulation is here! Autodesk EAGLE 8. Introductio The resistor (R), inductor (L), and capacitor (C) are the three elementary passive components of electronics. Did you use Matlab? One thing that has held me up is the cost and licensing for Matlab. Appetizers Bakes Basics Beverages Breakfast Chutneys & Pickles Desserts Main Course Onam Payasam Sides Snacks Soups Uncategorized. 74LS: Search. The Bluetooth® Low Energy (BLE) Link Layer has only one packet format used for both advertising channel packets and data channel packets: BLE packet Protocol Data Unit (PDU) size in specification v4. The problem is that placing the varistor in parallel to the AC voltage source will cause the simulation to crash (convergence problems). In a previous posting I discussed using Linear Technology's SPICE program (LTSpice IV) to perform Monte Carlo and Worst Case circuit analysis. "Construction of a Geiger counter" is a project which aims to create a Geiger counter that is functional under near space conditions. W3JDR 's LTSpice NE602/SA612 Here's something we've needed for a long time: an LTSpice model for the ever-popular NE602/SA612 chip. com reviews. A video which explains you to simulate digital circuits with a clock source, i. Offline Circuit Simulation with TINA TINA Design Suite is a powerful yet affordable circuit simulator and PCB design software package for analyzing, designing, and real time testing of analog, digital, IBIS, HDL, MCU, and mixed electronic circuits and their PCB layouts. How a Geiger counter counts Geiger counters monitor voltage rather than current. [2] For SO16 packages: Ptot derates linearly with 8 mW/K above 70 C. General Navigation. 概要 LTspice の使い方 (部品の追加) はじめに LTspice は非常に便利に、回路のシミュレーションを行ってくれる。 しかし、どうも部品が足りない。 実際のところ「秋月」「千石」あたりで入手可能な部品で回路は作. Modeling a VCVS in LTSPice is pretty simple using the "voltage dependent voltage source" component in LTSpice. The LM566 is a general purpose VCO which may be used to generate square wave and triangular waveforms as a function input voltage. Introduction to OrCAD Capture and PSpice Professor John H. First of all many thanks for the article and the LTspice simulation files. LTspice comes with a wide range of symbols. Their properties and behavior have already been detailed in the AC Resistance, AC Inductance, and AC Capacitance tutorials. Solution: Step 1: Since it is a 3-bit counter, the number of flip-flops required is three. Aug 15, 2016 #1 Attached are LTspice simulation model files I made for this popular IC. 2 is a comparator built from a common LM741 op amp. The New Qwiic Pro Micro is Here! February 7, 2020. The VHDL while loop as well as VHDL generic are also demonstrated. Counter example: one of Microcap11's integration methods has a fixed timestep. Use MathJax to format equations. , and Friday from 8 a. Figure 1 gives the circuit of one stage of common drain (CD) amplifier using n-channel FET. I n most clinical laboratories, platelet counts are routinely and reliably performed by modern automated blood cell analysers. The hardware circuit that controls the counter is surprisingly simple to do. zip 1/2010. Stripe the counter. Retrouvez le top des jeux gratuits et tous les jeux en promo au meilleur prix. Andy published his accurate and open source frequency counter that uses an Android phone as a display. Using shift registers. The American Radio Relay League (ARRL) is the national association for amateur radio, connecting hams around the U. During simulation of behavioral model, all the flows defined by the ‘always’ and. LTSpice is een freeware door Linear Technologies ontwikkeld als een simulator van de elektronische units. LTspice model for CD4060B 14-stage binary clock/counter LTspice model for CD4060B 14-stage binary clock/counter. A Johnson counter is a modified ring counter, where the inverted output from the last flip flop is connected to the input to the first. It's either all the way ON (near Vcc) or OFF (near 0 volts). Salary Research. In this design, the ripple carry design is suitably transformed such that the carry logic over fixed groups of bits of the adder is reduced to two-level logic. First of all, I would like to tell you about importance of current sensing/measuring. But if you raise the input voltage to +9V, you should have no problem with getting the currents you receive from the software model. See the complete profile on LinkedIn and discover Anum’s connections and jobs at similar companies. Introducing 74HC193 Simulation to LTspice Ron Fredericks writes: I have completed the design and test of a new component for LTspice/SwitchCAD III circuit simulation and schematic capture. The Simulator for Arduino is an Arduino Simulator program designed to fill in the gap since there were no professional Arduino Simulators available. The input count pulses are applied to input CP 0. It has an EEPROM memory of 1KB and its SRAM memory is of 2KB. A voltage comparator based on opamp is shown here. A video which explains you to simulate digital circuits with a clock source, i. fairchildsemi. This works in most cases, where the issue is originated due to a system corruption. As with other sequential logic circuits counters can be synchronous or asynchronous. Design a counter with the following repeated binary sequence: 0, 4, 2, 1, 6. If the exe you call then creates other process, such as calling another exe, and then exits the batch file will continue processing after the called exe has terminated, as it has no knowledge of other processes started by it. Even supposing it's \$150, which isn't insignificant, just having to email them to get a quote, and figure out the license, and worrying about the fact that the license is term limited, is kind of stressful when you're capacity is as a hobbyist. If J and K are different then the output Q takes the value of J at the next clock edge. Changed DDR maximum recommended trace lengths from 5 inches to 8. Coding and implementing the software code (using Python and OpenCV). Inductors are also known as coils or chokes. ca 1-2Vp-p using BFS17 transistors (first in common collector secod in common emitter. • Build and test your 8-bit counter. The latest version of Counter Strike Pobierz is currently unknown. You'd have to resort to a simulator specialized in digital circuits which will typically allow to define a bundle of signals (here: counter outputs) as a bus and will be able to display the bus state as e. Spice-Simulation Using LTspice Part 1. 2nd position in Regional level Football meet (2011). Web-based logic circuit simulator for people who want to build a computer from scratch. Verilog Simulation; VHDL Simulation; Today the most widely used language to describe electronics circuits and device models is the Spice netlist format (1973). For an example, take the application shown in the LT1997-3 datasheet and implement it in LTspice with a discrete LT6015 op-amp and some non-ideal resistors (Figures 2, 3). i want a binary output from counter, as expected i am currently getting an output in the form of waveforms. Use as many XOR-gates as you need. We offer high quality products with unrivalled support from our local engineering support, in-house design facilities and manufacturing locations around the world. Shows the usage of basic gates like AND, OR, XOR and NOT. LTspice_Guidelines. CSIR-UGC NET Marksheet June 2019. An inductor is a passive electrical component that opposes sudden changes in current. Thread starter alec_t; Start date Aug 15, 2016; Tags binary-counter cd4060 cd4060b lts ltspice spice-model; alec_t Well-Known Member. When you want to take an ID, you take it from a randomly chosen counter. ; In front of you there will be a representation of a JK type flip-flop with three buttons (J, K and Clock) and two indicators (Q and Q'). The LM566 is specified for operation over 0˚C to 70˚C temperature range. The gates in the counter are connected in such a way as to produce the prescribed sequence of binary states. The frequency of which is a linear function of a controlling. Spiceworks collects and uses limited personal information about you to be a part of our Community and to use our Tools & Apps. For some reason the LTSpice model does not show that. 概要 LTspice の使い方 (部品の追加) はじめに LTspice は非常に便利に、回路のシミュレーションを行ってくれる。 しかし、どうも部品が足りない。 実際のところ「秋月」「千石」あたりで入手可能な部品で回路は作. Product - InterDesign Twillo 3-Tier Spice Rack Organizer in Bronze/Sand, Pack of 4. W3JDR 's LTSpice NE602/SA612 Here's something we've needed for a long time: an LTSpice model for the ever-popular NE602/SA612 chip. Enter pin-numbers in all schematics, it will help you later when you connect the circuits on the board. Then, the acquired data is wirelessly sent to the cloud. This article will go over a few advanced functions. It has an EEPROM memory of 1KB and its SRAM memory is of 2KB. Hello everybody, i have figured out that LTspice uses a different model description when compared with Texas Instruments opamps. The file must be given a *. in a part of my project i need to write about differences between this two softwares. IEC & Associates does. Spice-Simulation Using LTspice Part 1. LTspice is a very good circuit simulation tool for electronic circuits. Design logic circuits online. Introduction to ATmega328 ATmega328 is an 8-bit and 28 Pins AVR Microcontroller , manufactured by Microchip, follows RISC Architecure and has a flash type program memory of 32KB. If a new line is selected, the program will continue from that point. So each counter tracks 1/100th of all IDs. A Qwiic Upgrade for a DIY Keyboard. Download the Eagle schematic symbol and PCB footprint for free. We do transient analysis for finding instantaneous voltages and currents in a circuit in reponse to given inputs. The Cat Faucet connects to your house water supply with a Saddle Valve and high-pressure tubing, just like many ice makers do. • Build and test your Mod-7 counter. This prevents. Generally, counters consist of a flip-flop arrangement which can be synchronous counter or asynchronous counter. Shows the usage of basic gates like AND, OR, XOR and NOT. Simulation of any one register/counter circuit. A neon lamp is simply a small glass tube filled with a low pressure gas such as neon. I would say it is not a fixable problem, given the state of some models. View attachment 37129. Likewise, if I follow the instructions for using the SRFLOP symbol, applying a high on the "R" pin causes Q to go high. The most important use of this property is that. png) DipTrace schematics (. Finally Complete! Enjoy. First of all, I would like to tell you about importance of current sensing/measuring. Step 3: Let the three flip-flops be A, B and C. Generally, counters consist of a flip-flop arrangement which can be synchronous counter or asynchronous counter. op button as shown below:. The register cycles through a sequence of bit-patterns. Basic Circuit Simulation with LTspice July 30, 2015 by Trevor Gamblin LTSpice is a versatile, accurate, and free circuit simulator available for Windows and Mac. Medicines such as Claritin and Zyrtec are often prescribed to combat allergy symptoms. LM8560 Digital clock circuit diagram with alarm. The method makes use of the Arbitrary Behavior Current Source, or "bi" default library component. The always construct, highlighted in red text, describes how the counter should behave. But there’s a snag. Getting started: Open the simulation in LabVIEW; In the front panel view, click on the button indicated in the LabVIEW tutorial to start the simulation. In simulations, if i change the input AC voltage below 130VAC i am not getting the startup and unable to see the resonance effect during IGBT off. 1) March 14, 2019 07/01/2018 1. You can also do this on the bench if you have a suitable VFO and an RF millivoltmeter or oscilloscope, and a frequency counter. A CPE device is telecommunications hardware located at the home or business of a customer. The Simulator for Arduino is an Arduino Simulator program designed to fill in the gap since there were no professional Arduino Simulators available. Inductors are also known as coils or chokes. It was initially added to our database on 01/23/2014. LTspice comes with a wide range of symbols. Video: Linux Mint is a breeze. First please save your schematic design as a file. 8ft Tape Light 300 LEDs SMD5050 Waterproof Music Sync Color Changing + Bluetooth Controller + 24Key Remote Control Decoration for Home TV Party - APP Controlled. 274 DESIGNING SEQUENTIAL LOGIC CIRCUITS Chapter 7 higher area densities through efficient use of array structures and by trading off perfor-mance and robustness for size. LTwiki is for LTspice, SPICE, and Electronics help. As was mentioned in the first article about the Burton induction cooktop, we traced out the circuit and found some very interesting tidbits to share. subckt definition, compared to what is displayed by the symbol, so the description will follow the visual cues in the symbol, not the hard-coded notation. Comprehensive software tool for civil engineers. 基本的にYAHOO! GROUPSはFacebookやmixiなどのSNSのように使うことができますが、言語が英語なので少し使い方に戸惑ってしまうことがあるかもしれません。 簡単にですが、YAHOO! GROUPS「LTspice」の利用方法について解説してみます。. txt file into the library/ies. 1000 Threads found on edaboard. There are two methods for software debouncing. It has an EEPROM memory of 1KB and its SRAM memory is of 2KB. The CD4017 has a pin that resets the internal counter. The modulo 10 counter has a structural description with primitives: INV (1), BUFGP (1), LUT3 (1), OBUF(5), IBUF(1), LUT4(3), FDC (4) After synthesis LTSPICE code for simulation was added to the layout. (on LTspice and CADENCE). Figure 1 gives the circuit of one stage of common drain (CD) amplifier using n-channel FET. com 4 UG933 (v1. 54L90 : Decade Counter. Here we are employing two ICs and 7 segment to perform this action. 2 Digit Up Down Counter Circuit Principle. HD74HC160, HD74HC161, HD74HC162, HD74HC163 3. An up/down counter is written in VHDL and implemented on a CPLD. Thus the output has two stable states based on the inputs which is explained using JK flip flop circuit diagram. As with other sequential logic circuits counters can be synchronous or asynchronous. The adjustment period with C2, and counter circuits within the IC 4060 will be only 2 Hz frequency dividing out the pin 3. The model is. Presettable Counter Using Ic 74192. During simulation of behavioral model, all the flows defined by the ‘always’ and. Simulations to run are as follows:. Onforu 33ft LED Strip Light, 10m Dimmable Tape Light, 3000K Warm. In LTspice, the humble voltage source rarely gets to demonstrate its true capabilities. The hardware circuit that controls the counter is surprisingly simple to do. Its ten active high outputs can give time delay from few seconds to hours. Press button, get result. SPICE simulation of a 4 bits Synchronous Counter with J K Flip Flop. IC 4060 is an excellent integrated circuit for timing applications. I'm trying to find a spice model for a counter like the 4029 to use in LTSpice. txt file into the library/ies. LTSpice Version IV LTspice IV is a powerful free analog and mixed signal circuit simulation and schematic capture tool offering unmatched performance, speed and ease of use. Johnson counter is also called as Inverse feedback counter or twisted Ring counter. This is the ninth year of production and the DVD has been well recieved at Hamfests, eBay and the web. It's very important to understand the current direction convention LTspice is using for various components, as will be demonstrated. A voltage comparator based on opamp is shown here. Verilog A and AMS Simulation. 3 MOSFET Circuits at DC Reading Assignment: pp. Simulating a quadrature decoder with LTSpice and what has become of it. The RC filter composed of R1 and C2. ; The MSB is Q[0] and the width of the output bus is relative to it. The outputs change state synchronously with the LOW-to-HIGH transition of either clock input. ★ダウンカウンタの原理. In simulations, if i change the input AC voltage below 130VAC i am not getting the startup and unable to see the resonance effect during IGBT off. Then use the bounceless pushbutton with a pull-up resistor. Most digital logic does not have a SPICE model available. This family includes the 4N25, 4N26, 4N27, 4N28. LTSPICE does incorporate some basic digital functions, but it is not a full-fledged digital simulator. Note 8 msec of unsettled behavior before it finally decides to. The hardware circuit that controls the counter is surprisingly simple to do. 概要 LTspice の使い方 (部品の追加) はじめに LTspice は非常に便利に、回路のシミュレーションを行ってくれる。 しかし、どうも部品が足りない。 実際のところ「秋月」「千石」あたりで入手可能な部品で回路は作. i want to know what is the advantage of Pspice compare to other one that companies spend a lot of money to buy it while they can use LTspice for free. 0 V general purpose logic applications The high-speed CMOS HC(T) logic family offers the broadest range of functions in the industry. Integrate a weather system (temperature, humidity and sunshine). NM0S 1x10_Wright. in a part of my project i need to write about differences between this two softwares. Be the first to review "4 bits Synchronous Counter with J K Flip Flop" Cancel reply. A few notes: All the devices are idealized and their use should be fairly straight-forward. OrCAD Free TrialOrCAD Trial provides full version of the latest release of OrCAD electronic design software solutions for free for a limited time, including OrCAD Capture CIS, OrCAD PSpice Designer, OrCAD PCB Designer Professional, OrCAD Sigrity ERC, and more. Presettable Counter Using Ic 74192. I included my simulation results below that clearly shows each of these operations occurring. I was able to configure and run the simulation using the drop down tools menu and the little "running person" icon on the tool bar. What has this got to do with a frequency doubler you may ask. A ring counter is a type of counter composed of flip-flops connected into a shift register, with the output of the last flip-flop fed to the input of the first, making a "circular" or "ring" structure. The quartz crystal to produce a proportional frequency, which is the frequency to set up ICs and Electrocardiograms, can be generated based on capacitor and resistor connections. 54L90 : Decade Counter. 検証環境 OS: Windows 10 Pro 64bit 【はじめに】 ・LTspice XVII入門：LTspice XVIIがリリースされました。 【導入編】 ・LTspice XVII入門：入手とインストール ・LTspice XVII入門：ディレクトリ構造とモデルやサンプルファイルの場所. Click on a switch (square with "0") to toggle. asy file in LTspice's /lib/sym/CD4000 folder. /lbr/ltspice/. Multisim Live is a free, online circuit simulator that includes SPICE software, which lets you create, learn and share circuits and electronics online. Digital Circuit Simulation with Pspice A/D D. Find, apply for, and land your dream job at your dream company. Thus the output has two stable states based on the inputs which is explained using JK flip flop circuit diagram. Because the. A 3 flip-flop Johnson counter is to be implemented using D flip-flops. Direct calibration (see Figure 2) of the frequency counter using the WWV signal is also possible when the WWV signal is reasonably strong, and if a 20 dB gain preamp is placed between the TRF receiver output and the frequency counter. A CPE device is telecommunications hardware located at the home or business of a customer. Did you use Matlab? One thing that has held me up is the cost and licensing for Matlab. Traffic counter system The video introduces the traffic counter system using wireless sensor mesh network. I recommend you get an oscilloscope and measure what this terminal will do across a variety of different alternator speeds and loads. Simulation of any one register/counter circuit. Simulator designed based on two ICs 4521 and 4017, which is used for frequency division and counter. Colpitts Oscillator. What we have learned so far enables us to simulate most designs. Here a simple and very versatile method of creating a current dependent current source in LTspice is presented. PSpice Online Training - SPICE circuit simulator application for simulation and verification of analog and mixed-signal circuits. subckt definition, compared to what is displayed by the symbol, so the description will follow the visual cues in the symbol, not the hard-coded notation. 5g around 1g, with a frequency of 0-2Hz. Running LTspice IV on Mac OS X. When it reaches "1111", it should revert back to "0000" after the next edge. 555 Timer: This tutorial provides sample circuits to set up a 555 timer in monostable, astable, and bistable modes as well as an in depth discussion of how the 555 timer works and how to choose components to use with it. In LTspice, the humble voltage source rarely gets to demonstrate its true capabilities. 1 review for 4 bit Asynchronous Counter with J K Flip Flop. The graph shows the current to light relationship. It has a simple and friendly interface based on drag-and-drop gestures. Verilog A and AMS Simulation. In this article I will teach Monte Carlo Simulation using LTspice with Step by Step Tutorials. The 555 timer here is used for producing the clock pulses. FIG 1 shows the jig of the LTC3878 external FET buck converter with a resistive load of 80mOhms. Comparing. The article is stating that to match 52Ω to 2000Ω you will need a an inductive reactance of 318Ω and a capacitive reactance of 328Ω. In this question i checked my HDD health on a drive i had for roughly a year. A D Flip Flop has been simulated in the video. I am interested in using the LTspice. – Four 16-bit Timer/Counter with Separate Prescaler, Compare- and Capture Mode – Real Time Counter with Separate Oscillator – Four 8-bit PWM Channels – Six/Twelve PWM Channels with Programmable Resolution from 2 to 16 Bits (ATmega1281/2561, ATmega640/1280/2560) – Output Compare Modulator. Emf Equation of Transformer. National Instruments Multisim now has microcontroller unit co-simulation capabilities, allowing you to include a microcontroller, programmed in assembly or C code, within your SPICE modeled circuit. Power conditioning The schematics in here make use of the libraries presented so far but, while the schematics rely on the custom elements, the thematics are, in general, for power conditioning. This counter does everything I want including a maximum count of ~ 4Ghz. Alternately, LTspice's standard S/R flip-flop symbol may be used to stand in for the Counter with reset by editing its SpiceModel attribute from "SRFLOP" to "Counter" after it has been placed on the schematic (S becomes the clock input, R becomes the reset input and Q and Q̅ become the two outputs). Polarity is a very important concept, especially when it comes to physically building circuits. New Articles. How to set a specific "time step" when I want to run a Transient Analysis. SPICE simulation of a 4 bits Synchronous Counter with J K Flip Flop. Search For a Part. CSIR-UGC NET Result Dec 2019. In this animated activity, learners examine the construction of a binary counter using a JK flip-flop. I n most clinical laboratories, platelet counts are routinely and reliably performed by modern automated blood cell analysers. This tutorial is going to show you how to install Wine on Linux Mint 19. HD74HC160, HD74HC161, HD74HC162, HD74HC163 3.


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Rating: 5.0

# LCG and the X (worth 250+205 points)
Part of the P.W.N. University CTF 2018 (https://uni.hctf.fun/pages/home/)

CHECK OUT THIS NEW ON CAPUS FANCLUB!!!
The LCG and the X FANCLUB

The description includes a link to the service with the following description:

Hello!
This is the website for our on-campus fanclub of the band LCG and the X!
Everyone can signup for the club to:

Get the latest LCG news
Communicate with other fans
Save secret messages prefixed with "flag{" (which is always handy...)

Saving secret messages prefixed with "flag{" definitely sounds like something we want.

When signing up we can provide some info (name, address, country and phone). This shows us a new page with an (auto-incremented) user number and a "random" numerical password that we can use to login as well as a personal password recovery token in the form of a 128x128 black&white bitmap (see below).

![bitmap of the recovery token for user 42](2018_pwnctf_lcgandthex_1.bmp)

The News we can find on the website include:

[...]
I also just signed up to make sure the signup process works.
Then I created a secret flag, which worked as well!
[...]
Because of the new data protection laws in europe I decided to temporarily disable the secret flag storage... I hope I can bring it back up soon...

When accessing the flag storage we get the message:

The Flag storage is currently disabled, only flags that you already have submitted will be shown here.

So we know that the flag has been placed by the creator who most likely has the user number 1. If we could login as that user, we could see the flag.

Revisiting the registration site we noticed that the password recovery token hat a URL in the format of http://.../42.bmp where 42 was our (actual) user id (lucky, right?). Obviously we now also had access to the password recovery token of the first user (see below), but one question remained: How do we use this token?

![bitmap of the recovery token for user 1](2018_pwnctf_lcgandthex_42.bmp)

The site offers no functionality to recover a password by uploading a token, so we assumed that all relevant information is encoded in the bitmap. By creating some more accounts with the same inputs for name etc. we realized that the tokens appeared to be completely randomized each time, with the user number having no immediately visible imapct.

We played around a bit with the bitmap and tried interpreting it as ASCII encoded text, but that failed. We then noticed that at least the first four bits in each line were black, so we assumed this could be 128-bit binary numbers in each row with the four most significant bits being zero.

We came up with a short python script to parse the image and output the 128 numbers.

import math
import os
import sys
import imageio

if len(sys.argv) != 2:
print("Usage: %s file.bmp" % sys.argv[0])
sys.exit(1)

filename = sys.argv[1]

out = 0
for line in image:
tmp = 0
for x in range(len(line)):
tmp <<= 1
tmp |= 1 if line[x] == 255 else 0
print("% 40d" % tmp)

The output for user 42 is:

13285128405728512840572851284044
7321782569713832870711499107358401786
1589124231055101792582259868857807391
[124 more numbers]
6133478240011003618640769383369411060

The password for user 42 is 6429760596071210556499524060198881378, which unfortunately (but not unsurprisingly) was not among the output numbers.

To verify that these numbers actually make sense (you could interpret anything as binary encoded numbers even if it was not intended to be) we tried comparing the numbers of two sequential users and luckily noticed that the first numbers, when subtracted, showed a difference of 313373133731337313373133731337. That was too good to be coincidence, so we were definitely on the right track.

## LCG and the multiplier, addend and modulo
If you try to make sense of the challenge title you inevitably end up on the Wikipedia page about Linear Congruential Generators. This is a simple kind of (not cryptographically secure) random number generators. They have the general form of X(n+1) = (a*X(n) + c) mod m where a is the multiplier, c is the addend and m is the modulo. Together with the seed X(0) they uniquely define the behavior of the generator.

However, we just have a bunch of outputs but don't know anything about a, c and m. Luckily these generators are extremely easy to break if you have three complete states, i.e., three sequential and unmodified outputs. And even better, you don't actually have to understand how this works since smart people already did the work and posted their python scripts online (See: https://tailcall.net/blog/cracking-randomness-lcgs/ ). The details aren't covered here since the linked blog post explains it quite well, so go read it if you are interested.

Otherwise just run the included scripts to get the following values:

m = 16285270385112413720426683811263350667
a = 313373133731337313373133731337
c = 123456789012345678901234567890

At this point we only have to guess what output of the RNG is the password (Spoiler: it's the 129th), but we can do this easily by playing around with the token of a user which we know the password of. So just take the last number x127 from the recovery image and calculate ((a * x127) + c) % m to get the password.

To recover the password of the first user either download their recovery image and start from the last number or, alternatively, take the initial seed of your user with the known number (e.g. 13285128405728512840572851284044 for user 42) and subtract 41*313373133731337313373133731337 to get the initial seed of the first user. Now you can just calculate 128 steps of the RNG to get the same password.

With the password 6160325624856057770563639672902954513 we could then login as the first user to retrieve the flag flag{https://www.youtube.com/watch?v=NvS351QKFV4#Y0L0SW4G}.

Original writeup (https://github.com/ldruschk/ctf-writeups/blob/master/2018_pwnctf_lcgandthex.md).

format: plain


text:
# Angular Momentum

In this momentum learning exercise, students use linear momentum to determine velocity and angular momentum to determine angular velocity. This learning exercise has 1 problem to solve.


text:
Logarithmic Sobolev spaces on R^n ; entropy numbers and some application.

Preprint series: 98-15, Analysis

The paper is published: Forum Math., 12, 257-313, 2000

MSC:
46E35 Sobolev spaces and other spaces of smooth'' functions, embedding theorems, trace theorems
46E30 Spaces of measurable functions ($L^p$-spaces, Orlicz spaces, Kothe function spaces, Lorentz spaces, rearrangement invariant spaces, ideal spaces, etc.)
41A46 Approximation by arbitrary nonlinear expressions; widths and entropy
35P15 Estimation of eigenvalues, upper and lower bounds
35P20 Asymptotic distribution of eigenvalues and eigenfunctions for PDO
35J70 Elliptic partial differential equations of degenerate type

Abstract: In earlier papers we have studied compact embeddings of weighted function spaces on R^n, $id_H: H^{s_1}_{p_1}(w(\cdot),R^n) \longrightarrow H^{s_2}_{p_2}(R^n)$, $s_1>s_2$, $1<p_1\leq p_2<\infty$, $s_1-n/p_1>s_2-n/p_2$, and $w(x)$ of the type $w(x)=(1+|x|)^\alpha (\log(2+|x|))^\beta$, $\alpha\geq 0$, $\beta\in\real$.
We have determined the asymptotic behaviour of the corresponding entropy numbers $e_k(id_H)$. Now we are interested in the limiting case $s_1-n/p_1=s_2-n/p_2$.
Let $w(x)=\log^\beta\langle x\rangle$, $\beta>0$. Then $id_H$ cannot be compact (for any $\beta>0$), but replacing the Sobolev spaces $H^{s_i}_{p_i}$, $i=1,2$, by their logarithmic counterparts, $H^{s_i}_{p_i}(\log H)_{a_i}$, $a_i\in\real$, $i=1,2$, one can prove compactness of the so modified embedding $id_{H,a}$ in some cases. In an earlier paper we have followed this idea, introducing logarithmic Lebesgue spaces $L_p(log L)_a(R^n)$ for this purpose.
We continue and extend these results now, and study the entropy numbers $e_k(id_{H,a})$.
Finally we apply our result to estimate eigenvalues of the compact operator $\; B= b_2\circ b(\cdot, D)\circ b_1\;$ acting in some $L_p$ space, where $b(\cdot,D)$ belongs to some Hörmander class $\Psi^{-\varkappa}_{1,\gamma}$, $\varkappa>0$, $0\leq\gamma\leq 1$, and $b_1, b_2$ are in (weighted) logarithmic Lebesgue spaces on R^n.

Keywords: logarithmic spaces, function spaces, entropy numbers