In the case of the light sensor (phototransistor) and temperature sensors (LM-335) it is not necessary to connect the power, because they are powered with low current measurement input via a resistor pull-up (for microprocessor-based controllers with the CPU power supply 5V).
Katika kesi ya mwanga sensor (phototransistor) na sensorer joto (LM – 335) sio lazima kuunganisha nguvu, kwa sababu wao ni powered na pembejeo za sasa kipimo kupitia resistor kuvuta – up (kwa microprocessor – makao controllers na 5V CPU umeme) .