Midi PCB
Please read the disclaimer before consdering to use this.
This is a PCB for the Mister FPGA that extends midi functionality through the Mister user port. It requires a Mister I/O board for that. Unlike other available solutions, it is designed to be mounted below the actual Mister stack. In addition, it has some LEDs for power, midi in and midi out signaling.
| Quantity | Label | Part | JLCPCB Preassembly |
|---|---|---|---|
| 2 | R6,R7 | 0805 10 ohm resistor | yes |
| 2 | R4,R5 | 0805 33 ohm resistor | yes |
| 6 | FB1,FB2,FB3,FB4,FB5,FB6 | 0805 Ferrite EMI Supression Filter 1k Ohm | yes |
| 1 | C1 | 0805 100nF ceramic capacitor | yes |
| 2 | C2,C3 | 0805 10uF tantalum capacitor | yes |
| 1 | R1 | 0805 2k ohm resistor | yes |
| 3 | R3,R8,R9 | 0805 220 ohm resistor | yes |
| 1 | R2 | 0805 470 ohm resistor | yes |
| 1 | D1 | 0805 1N4148 diode | yes |
| 1 | U1 | SMD H11L1 opto-coupler | yes |
| 1 | U2 | SMD 74HC14 | yes |
| 1 | D2 | 0805 LED green | yes |
| 1 | D3 | 0805 LED blue | yes |
| 1 | D4 | 0805 led white | yes |
| 1 | U3 | LM1117-3.3 | yes |
| 1 | J2 | USB3 Type-A connector - note: exact model untested! | no |
| 3 | J1,J3,J4 | DIN5 Midi connector | no |
In the Gerber directory, there are three relevant files:
- The Gerber ZIP
- The BOM File
- The CPL File
The latter two files can be used for buying a batch of PCBs with SMD parts preassembled from JLCPCB. In that case, there are just four through-hole parts left to solder (User port USB3 connector and 3 DIN5 connectors). These are the parts marked with JLCPCB preassembly "no" in the table above.
Make sure you get the right footprints.
The project is open-source and DIY. You can therefore build your own and even sell them if you want. If you don't want to build one for yourself and are located in the EU, you are welcome to contact me. I may build one on demand if I have the time.