2 layers64 × 55 mm
2 layers187.8 × 39.8 mm
HWIO
423F26/project2ZynADAC is an Input/Output Audio Interface for the RBPi.
- Size
- 187.8 × 39.8 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 11
- Nets
- 26
- Pads
- 46
- Tracks, vias
- 21, 0
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 10 Aug 2026
- Updated
- 30 Oct 2026
Overview
HWIO is an open-source printed circuit board by 423F26, from the 423F26/project2 repository on GitHub. It is a 2-layer board of 187.8 × 39.8 mm with 11 parts on 26 nets, routed with 21 tracks and 0 vias.
It is built around the PJ-609BA.
Main components
1README
HW/piADAC/README.mdZynADAC
ZynADAC is an Input/Output Audio Interface for the RBPi.
It features:
- Burr Brown (Texas Instruments) PCM5242 (DAC)
- Burr Brown (Texas Instruments) PCM1863 (ADC)
- 2 x ultra-low jitter oscillators (44.1 & 48 KHz)
- 3 x dedicated ultra-low noise LDOs (analog DAC, analog ADC, digital)
This design is inspired in the Hifiberry soundcards.
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License
Parts
11| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | Conn_01x02_MountingPin | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J1, J3, J8, J9, J11 |
| 4 | PJ-609BA | EasyEDA:AUDIO-TH_PJ-609BA | J4, J5, J6, J7 |
| 2 | Conn_02x03_Odd_Even_MountingPin | Connector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_Vertical | J2, J10 |
Questions
How big is the HWIO PCB?
It measures 187.8 × 39.8 mm and has 2 copper layers, 1.6 mm thick.
What parts does the HWIO use?
11 parts, built around the PJ-609BA. 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 HWIO KiCad files?
From the 423F26/project2 repository on GitHub, at the commit this page was made from: the board is HW/I-O/HWIO/HWIO.kicad_pcb and its schematic HW/I-O/HWIO/HWIO.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the HWIO design in my own project?
Its repository states no licence, so its author keeps all rights: ask 423F26 before reusing the design.
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