midi-fader
by kcuzner
167 parts · 74 × 79 mm
heypcb · Circuit World · Community board
USB-MIDI Touch Keyboard Segment
by Sukaran@sukarxn
Single-octave USB-MIDI keyboard on 2-layer board. 12 piano-shaped capacitive touch keys plus octave up/down pads, read by the STM32F072's built-in touch controller. Shows up as a class-compliant MIDI device over crystal-less USB-C, with no drivers needed. Also has 3.5 mm TRS MIDI out, I2C chain connectors on both short edges to link several octaves, an OLED header, an optional speaker driver, SWD and a USB DFU boot button. Order with black solder mask so the silkscreen keys look
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Write a note about this board- Board size
- 170 × 60 mm
- Parts
- 86 parts
- Nets
- 76 nets
- Licence
- CERN-OHL-S v2
Published Oct 7, 2026
Published snapshot
Stored error counts · DRC: 1 · ERC: 0
stm32usb-midicapacitive-touchkeyboard
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