Raspberry Pi Relay Module Expansion Board with Isolated Optocoupler

Guide of using: https://drive.google.com/file/d/1P8upgPtRLUsqDX2xbi0YppGzprPyU0Q8/view?usp=sharing. Note: Raspberry Pi needs to be powered separately. The Raspberry Pi supplies power to the relay board through GPIO.​​​​​​​Circuit Isolation Design: Adopt double isolation circuit scheme. Raspberry Pi isolation and power control signal optocoupler isolation. Isolate the Pi outside the high-voltage circuit to avoid the high-voltage circuit switching from interfering with the operation of the Raspberry Pi.High Quality: The relay module is produced by automatic reflow soldering machine, and uses ultrasonic cleaning, which has stable performance and can effectively prevent functional short circuit.Use: 3-channel 10A relay module, can realize voice control, web page control and timing control. Make life easy and efficient.Application: The Relay Board gives your Raspberry Pi board the ability to control high voltage/high current devices, and easily makes normal home appliances become intelligen