2 layers18.5 × 26 mm
24g2usb rp2350zero
joypad-ai/joypad-os
Universal controller firmware for building adapters, dongles, and custom controllers.
4 parts1.7kApache-2.0
2 layers
Soundcard
GLGPrograms/ceda-764891A soundcard for Ceda and a music player application running in CP/M
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 4
- Nets
- 58
- Pads
- 84
- Tracks, vias
- 101, 12
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 20 Jul 2025
- Updated
- 21 Jul 2025
Overview
Soundcard is an open-source printed circuit board by GLGPrograms, from the GLGPrograms/ceda-76489 repository on GitHub. It is a 2-layer board with 4 parts on 58 nets, routed with 101 tracks and 12 vias.
Its parts include 2 ICs, 1 capacitor and 1 connector.
README
README.mdceda-76489
Extend the Ceda/Sanco computer with a soundcard.
The soundcard is connected to the Z80 bus, exposed via the "EXBUS" connector on the Ceda's mainboard. The heart of the sound generation is the SN76489AN from Texas Instruments, a three voice (+1 for noise) programmable sound generator. In this project one can find the hardware schematic and protoboard design, a music player for CP/M able to read VGM music files, and an Arduino sketch that can be used to check the functionality of the 76489 chip.
The repository structure
soundcard: the circuit used for this project. The PCB was never realized, it's just a guideline for the protoboard placement and wiring;vgmplay: the music player. It can read .VGM files from the disk;arduino-76489: a proof-of-concept used to test the SN76489 chip before starting with the project.
Schematics
BOM
| Part No | Part ID/value | Description |
|---|---|---|
| U1 | SN76489AN | Programmable sound generator (*) |
| U2 | 74LS138 | 3-to-8 decoder |
| C1 | 100n | Ceramic/poly decopuling capacitor |
| J1 | 25x2 | IDC connector (same as SCSI) |
| J2 | - | Audio jack or screw terminal (audio out) |
(*) The usage of variants of this chip may require adjustments, i.e. the slower clock variant may require a separate clock.
Application
The application can be assembled with assembler included in z88dk toolchain. Open a terminal and launch
cd vgmplay
makeParts
4| Qty | Value | Footprint | References |
|---|---|---|---|
| 1 | 100n | Capacitor_THT:C_Rect_L7.0mm_W2.0mm_P5.00mm | C1 |
| 1 | 74LS138 | Package_DIP:DIP-16_W7.62mm_LongPads | U2 |
| 1 | EXBUS | Connector_IDC:IDC-Header_2x25_P2.54mm_Latch_Vertical | J1 |
| 1 | SN76489AN | Package_DIP:DIP-16_W7.62mm | U1 |
Questions
What parts does the Soundcard use?
4 parts. 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 Soundcard KiCad files?
From the GLGPrograms/ceda-76489 repository on GitHub, at the commit this page was made from: the board is soundcard/soundcard.kicad_pcb and its schematic soundcard/soundcard.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Soundcard design in my own project?
Its repository states no licence, so its author keeps all rights: ask GLGPrograms before reusing the design.
Similar boards
- 2 layers116 × 33 mm
- 2 layers19 × 18 mm
Daughter board
hackclub/OnBoard
💡 Join 1,000 teenagers and make your first PCB with a $100 grant!
4 parts915 - 2 layers24.8 × 24.8 mm
Nrf24 breakout
tardate/LittleArduinoProjects
a collection of "Little Electronic & Arduino Projects", most involving electronics or an Arduino in one way or another!
4 parts803MIT - 2 layers26 × 20 mm
Cap chain
drandyhaas/KiCadRoutingTools
A set of Python/Rust tools to aid routing in KiCad
4 parts744MIT - 2 layers34.7 × 20 mm
XG Station Power MSI
osy/XG_Mobile_Station
Open source eGPU dock for ROG Ally and ROG Flow
4 parts712CC-BY-4.0 - 2 layers20.3 × 24.5 mm
Jack power input
Luos-io/luos_engine
Open-source and real-time orchestrator for cyber-physical-systems, to easily design, test and deploy embedded applications and digital twins.
4 parts546MIT - 2 layers35.1 × 92.1 mm
SDEX2M2 MicroSD Express to M.2 NVMe Adapter for Switch 2 WIP
NVNTLabs/switch2-SDEX2M2
Micro SD Express to M.2 NVME Adapter for Nintendo Switch 2
4 parts542GPL-3.0