桂花蒸

Cost-effective customized keyboard USB adapter

Overview

Introduction

Take a look at the 32U4 that was often used before, and you will feel the shock of the price of tens of yuan per piece. If you use STM32, more level conversion and peripheral devices and the price will be a headache.

Are there cheaper, versatile HID equipment solutions? Yes, it is this CH9329. Its function is very simple, that is, it can be customized as a keyboard and mouse HID device, or a customized USB device, and then it can transmit character data or mouse commands.

In general, there are several advantages:

Cheap

Simple

Highly configurable

The modules we open source this time can be said to be very small. In this way, even if you don’t copy and paste, you can add it to any design by using it directly.

You can completely use a cheap MCU, and then use it to implement a USB keyboard or even mouse. This is its convenience.

Things have been verified and the official host computer can be used normally. Of course, more research needs to be done by yourself.

Relevant information from the official website

https://www.wch.cn/search?q=CH9329&t=downloads

https://www.wch.cn/downloads/CH9329EVT_ZIP.html

Design Files

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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.

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Update:2025-05-11 18:44:38

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