Tuya controlled RGB colorful light with switch function 583828A

1. Schematic diagram preparation: Basically, it is done according to the course idea. The Tuya WB3L A14 pin is used alone to control the relay on-off control RGB to realize the switching function. Note that a diode needs to be added to the relay drive circuit to consume the reverse current at the turn-off moment. ,this point is very important! Otherwise, it is easy to burn out the transistor of the driving circuit;
2. PCB drawing;
During the PCB drawing process, you need to pay attention to the elimination of copper coating in the antenna area. In addition, because the components were not placed in a standardized manner in the early stage, it was later found that many wire harnesses could not be routed, so several procedures were adopted. Hole routing, final test of normal use;
3. Arrival welding:
 
It is best to use a soldering station for welding during the welding process. After welding is completed, use board washing water to clean it, otherwise the flux residue will make the board ugly;
4. Debugging 
is already a face-to-face development, and it is already a debugged program;
it is successfully lit once: