Tuya Sandwich Smart Pet Product Board

This topic describes the Tuya Sandwich function board designed for prototyping smart pet products. This board is used in tandem with the microcontroller board.

Scenarios

This board can be used to prototype smart pet feeders, pet water dispensers, and aquariums.

Components

This board consists of the following key components:

• A circuit used to measure weight, consisting of an analog-to-digital converter (ADC) and an external load cell.
• A circuit used to record and play audio, consisting of a microphone and a voice chip.
• A motor driver circuit.
• A circuit used to regulate the voltage of the water pump, consisting of a boost converter and peripheral circuits.
• A driver circuit used to connect to an external UV disinfection light and water heater.
• A temperature acquisition circuit.
• An interface to connect to an external OLED display.
• RGB indicator circuit.
• Key event detection circuit.

It has an interface for connecting to the Tuya NANO or Sandwich microcontroller board.

Pin functions

The board offers a variety of peripheral interfaces. The following table lists the pin functions.

Power requirements

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

Schematic diagram and PCB

Schematic diagram

The schematic diagram of the board:

PCB

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.

Reference

• Project Hub
• Tuya Sandwich Evaluation Kit