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NodeMCU8266 expansion board

Overview

## Introduction to the work This work is an expansion board designed for NodeMCU8266, which is compatible with two types of NodeMCU8266 on the market (the widths of the two are different). The design of the NodeMCU8266 expansion board on the market is very unreasonable. The signal and power interfaces are distributed on both sides of the entire board... The module wiring of the SVG 3Pin interface is even worse, so this work was created... This work was the first one two or three years ago. The first work designed by **Konja** (me) who came into contact with PCB design, ~~ I made many mistakes over and over again ~~... ## Schematic design ! [Schematic_8266 expansion board_2022-08-24. png]

The painting is a bit messy (~~**_It’s definitely not because I was not very good at using the Internet at that time_**~~) However, it does not affect the use! The old actor 7805 is used to reduce the voltage, expand the universal 3P interface, and connect the LED to the IO. The DIP switch controls the negative pole of the LED (main switch). ## Physical display ! [WeChat picture_20220824221348.jpg]

Note: This is not the final schematic version! ## Note: No (manual dog head) ## The demonstration video does not have an expansion board, so there is no need for demonstration... (manual dog head +1)

Design Files

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Update:2025-06-19 14:04:30

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