4 layers102.9 × 96.7 mm
PicoGUS chipdown
polpo/picogus
Emulation of ISA sound cards and CD-ROM on Raspberry Pi Pico (GUS, SB/Adlib, MPU-401, Tandy, CMS, Panasonic CD-ROM) with USB mouse/joystick support
99 parts805
2 layers258.4 × 110.4 mm
Midi Keyboard pcb
ejfpanda/Midi-KeyboardA midi keyboard with pcb and cad and firmware
- Size
- 258.4 × 110.4 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 56
- Nets
- 60
- Pads
- 289
- Tracks, vias
- 409, 25
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 18 Jul 2026
- Updated
- 22 Jul 2026
Overview
Midi Keyboard pcb is an open-source printed circuit board by ejfpanda, from the ejfpanda/Midi-Keyboard repository on GitHub. It is a 2-layer board of 258.4 × 110.4 mm with 56 parts on 60 nets, routed with 409 tracks and 25 vias.
It is built around the PCM5100PW. Its parts include 23 switches, 22 diodes, 3 capacitors, 2 connectors and 1 IC. It belongs with the audio and music and keyboards and input boards and the RP2040 boards of this library.
Main components
1README
README.mdMidi-Keyboard
Overview
It has 20 keys, 2 rotary encoders, a digital-to-analog converter (I2S DAC), an sd card, LCD and uses a raspberry pi pico. You can use the rotary encoders to shift octaves and also change midi channels. The microcontroller is used to process user input into this midi keyboard.
CAD
PCB and schematic
Required parts:
| Component | Amount |
|---|---|
| Raspberry Pi Pico | 1x |
| MX-Style switches | 21x |
| 1N4148 Diodes | 20x |
| EC11 Rotary encoder | 2x |
| Case | 1x |
| PCB | 1x |
| M3x25mm screws | 4x |
| PCM5100 I2S DAC | 1x |
| ST7735R | 1x |
| SD Card | 1x |
Parts
56| Qty | Value | Footprint | References |
|---|---|---|---|
| 22 | 1N4148 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D1, D2, D3, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22 +6 |
| 20 | SW_Push_45deg | Button_Switch_Keyboard:SW_Cherry_MX_1.00u_PCB | SW1, SW2, SW3, SW4, SW5, SW10, SW11, SW12, SW13, SW14, SW15, SW16, SW17, SW18, SW19, SW20 +4 |
| 2 | 1uF | Capacitor_THT:CP_Axial_L10.0mm_D4.5mm_P15.00mm_Horizontal | C1, C3 |
| 2 | RotaryEncoder_Switch_MP | Rotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm | SW21, SW22 |
| 1 | 2.2uF | Capacitor_THT:CP_Axial_L10.0mm_D4.5mm_P15.00mm_Horizontal | C4 |
| 1 | PCM5100 | PCM5100APWR:SOP65P640X120-20N | U2 |
| 1 | RaspberryPi_Pico | Module:RaspberryPi_Pico_Common_Unspecified | A1 |
| 1 | SD Card | Connector_PinSocket_1.00mm:PinSocket_1x04_P1.00mm_Vertical_SMD_Pin1Right | J2 |
| 1 | ST7735R | Connector_PinSocket_1.00mm:PinSocket_1x08_P1.00mm_Vertical | J1 |
| 1 | ~ | Button_Switch_Keyboard:SW_Cherry_MX_1.00u_PCB | SW23 |
The 52 most common of 56 parts.
Questions
How big is the Midi Keyboard pcb PCB?
It measures 258.4 × 110.4 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Midi Keyboard pcb use?
56 parts, built around the PCM5100PW. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Midi Keyboard pcb KiCad files?
From the ejfpanda/Midi-Keyboard repository on GitHub, at the commit this page was made from: the board is Midi keyboard pcb/Midi Keyboard pcb.kicad_pcb and its schematic Midi keyboard pcb/Midi Keyboard pcb.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Midi Keyboard pcb design in my own project?
Its repository states no licence, so its author keeps all rights: ask ejfpanda before reusing the design.
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