Simple Midi to gate module with 12 gates. It's in the KOSMO format made by Look Mum No Computer (20cm high, 7.5cm wide). Gates are 5V.
Download the lates release including the gerber files and Arduino code
The code can be found in the code directory and requires only a midi library. Install instructions for this lib can be found in the repo.
| Reference | Quantity | Value | Description |
|---|---|---|---|
| A1 | 1 | Arduino Nano | |
| C1, C2, C5 | 3 | 10u | EL cap |
| C3, C4, C6, C7, C8, C9, C10, C11 | 8 | 100n | ceramic disc cap |
| D1 | 1 | 1N4148 | diode |
| D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12, D13 | 12 | LED | legs should be |
| 25mm long | |||
| J1, J2 | 2 | MIDI jacks | |
| J1, J2 | 2 | Molex 3pin | for MIDI jacks, you can also solder directly |
| J3, ... J15 | 12 | Large jack sockets | |
| R1, R13, R14 | 3 | 220 | |
| R2, R3 | 2 | 10R | |
| R4, R5, R6, R7, R8, R9, R10, R11, R15, R16, R17, R18, R19, R20, R21, R22, R23, R24, R25, R26, R27, R28, R29, R30 | 24 | 1k | |
| R12 | 1 | 10k | |
| U1, U4, U5 | 3 | TL074 | opamp |
| U2 | 1 | 6N137 | optocoupler for midi |
| U3 | 1 | L7805 | 5V regulator |