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CH552G customized function keyboard can be expanded

Overview

Functional design:
1. You can choose to use IIC screen display / 2 custom buttons
2. You can choose to use serial communication / LED indicator light to display status / 2 custom buttons
3. When using 2/4 custom buttons, you can Choose to cut off the excess board
4. It can be used as a development board for learning and use.
Note: The program comes from various websites and has only been tested for the time being. It can be used normally for a long time without being disconnected. Press the EC11 encoder to switch the rotation function to adjust the up and down music or volume, and press the button I wrote down 5 functions at random, but I haven’t figured out the design of the button functions yet, so it’s not perfect. The original author information has been lost. If there is any infringement, please contact us to delete it. Thanks.

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:2025-06-25 05:17:10

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