At last We weld the second negative, represented black in the schematic; Some models just weld it to the negative of the same circuit of the LEDs, but in the case of Syma X 8 this will produce a constant sound during the whole flight as shown in the next video, Since the leds lower luminosity to the Flash, but they do not go completely.
Hatimaye Sisi weld hasi pili, nyeusi ya kuwakilishwa katika schematic ya; Baadhi ya mifano tu weld ni kwa hasi ya mzunguko huo wa ya LEDs, lakini katika kesi ya Syma X 8 hii kuzalisha sauti mara kwa mara wakati ndege wote kama inavyoonyeshwa katika ya video ya pili, Tangu ya leds mng'ao chini kwa kiwango cha, lakini si kwenda kabisa.