TouchMIDI25key is an electric board that can output MIDI messages from the USB port by touching capacitive sensors ordered like a musical keyboard. You can use it as USB MIDI Keyboard just this one!
It also has pins that can be connected to YMF825board (Yamaha FM tone Generator), and a microprocessor contains firmware that operates YMF825 to play FM sound.
You can purchase this board here:
https://www.switch-science.com/catalog/3860/
Below is an example of a gadget by this board. I made a portable FM tone generator keyboard. Please check this short introduction.
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I've been working as embedded software engineer. Recently I enjoy developing not only software but also hardware.
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