Back to the forum again. Tmall Genie, Hey, what's up, master? Turn on the lights in the living room. OK, master, the lights in the living room are on.[img]file:///C:\Users\king\Documents\Tencent Files...
The figure below is a flyback multi-channel output circuit. If both 5V and 3.3V are output normally,
The voltage-dividing resistors R1 and R2 will bias the transistor Q1. If Q3 and Q2 are in the off s...