MartinFowler

Three-way optocoupler isolation relay development board (WB3S/ESP8266)

Overview

The control module can use the Tuya WB3S module. The default plug-in firmware supports the control of up to seven relays (three onboard) and is equipped with relay main control power indication and control buttons. You can also use ESP-12S/12E/12F/07S and connect an external ESP-01S programmer through the interface to program firmware for the ESP8266 module, eliminating the need for a serial port download circuit! It can be connected to an external 220V power supply, and the 220V can be converted into a 5V power supply through the AC-DC conversion module. It can also be directly connected to an external 5V power supply or powered through a USB port. For the relay part, you can buy the original parts and weld them yourself, or you can buy 3 modules of this kind, fix them to the circuit board, and solder the terminal blocks!

Design Files

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Update:2025-06-19 03:30:41

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