This project is based on ------- arduino pro micro --- the minimum system that needs to use 32U4 --- simple and practical. You can write the keys yourself or follow mine to write a small keyboard. It's simple.
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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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