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

All reference designs on this site are sourced from major semiconductor manufacturers or collected online for learning and research. The copyright belongs to the semiconductor manufacturer or the original author. If you believe that the reference design of this site infringes upon your relevant rights and interests, please send us a rights notice. As a neutral platform service provider, we will take measures to delete the relevant content in accordance with relevant laws after receiving the relevant notice from the rights holder. Please send relevant notifications to email: bbs_service@eeworld.com.cn.

It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.

Hot

Technical Resources More

Search Datasheet?

Supported by EEWorld Datasheet

Technical Videos More

Forum More

Update:2025-08-03 03:00:22

How to test the quality of crystal oscillator
As the title says, how do you determine whether a crystal oscillator is working properly? Do you need an oscilloscope?
S3C6410 SDboot program solution, send SDBOOT complete program.
When I compile, CPU_NAME reports an error. The assembly code is as follows: ;; Copyright (c) Microsoft Corporation. All rights reserved.;;; Use of this source code is subject to the terms of the Micro
Is there any integrated filter with a cutoff frequency of around 2K?
RT, thank you
Depressed, driver design
I have just been in the company for a week. I have been using .NET before. Now the company wants me to write some drivers. They gave me a book called "WIN2000 Driver Design". I have been reading it fo
2012TI Cup Discussion Group
2012TI Cup A Question 205737117 2012TI Cup B Question 205736989 2012TI Cup D Question 205736793 2012TI Cup E Question 40054205
I'm learning power pcb5.0.1 recently. Which big brother can help me solve a simple problem?
I'm learning Power PCB 5.0.1 recently. Can anyone help me solve a simple problem? How to place a pad, via, or mounting hole directly in the workspace? What command should I use?

Datasheet More

Circuits More