
Audio board
stefvanson/audio-board
Audio interface board design (PCB) for recording and playing back audio, MIDI IO and some additional IO.

A basic PCB for the FlexMAFD device by dimant / FlexMAFD
FlexMAFD02 is an open-source printed circuit board by AndrewClaes, from the AndrewClaes/FlexMAFD-PCB repository on GitHub. It is a 2-layer board of 99.1 × 41.9 mm with 14 parts on 58 nets, routed with 87 tracks and 1 via.
It is built around the MCP4902-E/P, SJ1-3523N and 57PC5F. Its parts include 4 connectors, 3 ICs, 2 resistors, 2 diodes and 1 capacitor. It belongs with the NXP (LPC, Kinetis, i.MX RT) boards of this library.
A basic PCB for the FlexMAFD device by dimant / FlexMAFD
| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | SJ1-3523N | digikey-footprints:Headphone_Jack_3.5mm_SJ1-3523N | CON1, CON2, CON3 |
| 1 | 0.1uF | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P2.50mm | C1 |
| 1 | 1N4148 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D1 |
| 1 | 220 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1 |
| 1 | 470 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R2 |
| 1 | 57PC5F | componentsearchengine:57PC5F | J1 |
| 1 | 6N138 | digikey-footprints:DIP-8_W7.62mm | U1 |
| 1 | LED | LED_THT:LED_D3.0mm | D2 |
| 1 | MCP4902 | digikey-footprints:DIP-14_W3mm | U3 |
| 1 | Teensy-LC | teensy:Teensy30_31_32_LC | U2 |
The 12 most common of 14 parts.
It measures 99.1 × 41.9 mm and has 2 copper layers, 1.6 mm thick.
14 parts, built around the MCP4902-E/P, SJ1-3523N and 57PC5F. 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.
From the AndrewClaes/FlexMAFD-PCB repository on GitHub, at the commit this page was made from: the board is FlexMAFD02.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Its repository states no licence, so its author keeps all rights: ask AndrewClaes before reusing the design.

stefvanson/audio-board
Audio interface board design (PCB) for recording and playing back audio, MIDI IO and some additional IO.

JacobChrist/HackadayS8-OscilliscopeArt
https://hackaday.io/project/198922-oscilloscope-art-at-hackaday-supercon-8



electrified/rc2014-ym2149
KiCad schematics and gerbers for a YM sound card for the RC2014. See it in action here: https://www.youtube.com/watch?v=-iLwi9FagFE


electrified/rc2014-ym2151
Yamaha's DX21, DX27 and DX100 synthesisers used a derivative IC which is very similar.

dennowiggle/Retro-PETER
3.3V Retro computer project => FPGA + RCBUS + CPU boards making a custom system.