Tuya Sandwich RGB Strip Lights Board

This topic describes the Tuya Sandwich function board designed for prototyping RGB strip lights. This board is used in tandem with the microcontroller board and power supply board.

Components

This board is composed of ten 5V RGB light beads, a sound pick-up circuit consisting of a microphone and operational amplifier, and the extension interfaces for an IR receiver circuit and external RGB strip lights. It has an interface for connecting to the Tuya NANO or Sandwich microcontroller board. The following table lists the key components:

Pin configuration

For the numbers in blue color:

1. RGB light beads: It has a built-in LED driver IC and is powered by a 5V supply.
2. Jumpers: They are used to set the control signals as the built-in LED beads (LED1 to LED10) or the connected external RGB strip lights (indicated by number 3).
3. Extension interface: It is used to connect to external RGB strip lights that are powered by a built-in supply or an external 12V Arduino board.
4. Microphone: It is used to pick up sounds.

Pin definition:

Power requirements

Supply voltage to the RGB strip lights board according to the operating voltage of the microcontroller board. 5V DC voltage is recommended.

Schematic diagram and PCB

• The schematic diagram of the board:

  

• The PCB board:

  

Things to note

• The RGB strip lights board must be used in tandem with the microcontroller board and power supply board.
• The power supply pin must not contact I/O pins to avoid shoot-through.