【Training Camp】Internet of Things Confession Light +540724A

Using Tuya smart wb3s module development-free method, heart-shaped PCB, RGB color can be controlled 1. The power supply part can be powered by an Android phone data cable or an external battery. Use mc34063 to boost the voltage to 26V (replace the 20K resistor with 10K and it will boost to 12V) to power the RGB lamp. The series scheme used can be changed to a parallel scheme without the need for boosting. Use AMS1117-3.3V to power the Tuya WB3S module. There is no switch in the power supply because I don't need it. If you need it, you can add it yourself. 2. The Tuya wb3s module uses a development-free solution and selects the default pin configuration of the rgbcw lamp. I only used RGB lamp beads, the CW part is led out through pins and can be connected externally. Other pins of the wb3s module have been lead out. You can choose the mcu+wifi module solution and carry out secondary development by yourself. Let me praise Tuya’s development-free approach, which is really fast. 3. The usb to serial port part uses ch340c, which is for secondary development. I used the development-free method, so I did not solder this part. 4. The actual measured rgbcw pull-down resistor can be omitted. 5. Problems encountered: I used the 0603 package for the 100uf capacitor of C4 (wrong package), so I soldered a 10uf capacitor on it. The capacitor here plays a filtering role, so it can be replaced. The L1 inductor package is a bit smaller than the inductor I bought, so it is a bit difficult to solder.

[Link to Tuya IoT development platform] https://auth.tuya.com/?from=https://www.tuya.com/cn/&_source=cbc30f99f7a6c4aebca6755c2fab437f (contains detailed development documents)