2 layers85 × 115 mm
OSO BOOK C1
joeycastillo/The-Open-Book
For details on how to build, test and use Open Book, I've made documentation available here.
38 parts8.1kCC-BY-SA-4.0
2 layers20.5 × 35.5 mm
Girdad
ras-rap/girdadA modern USB-C dongle/device for IrDA SIR.
- Size
- 20.5 × 35.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 38
- Nets
- 33
- Pads
- 115
- Tracks, vias
- 157, 17
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 17 May 2026
- Updated
- 31 May 2026
Overview
Girdad is an open-source printed circuit board by ras-rap, from the ras-rap/girdad repository on GitHub. It is a 2-layer board of 20.5 × 35.5 mm with 38 parts on 33 nets, routed with 157 tracks and 17 vias.
It is built around the TFBS4711-TR1 and MCP2122-E/SN. Its parts include 10 capacitors, 6 resistors, 3 ICs and 1 connector.
Main components
2README
README.mdGIrDAd
A modern USB-C dongle/device for IrDA SIR.
What is this?
This is a IrDA VCOM device/dongle port thing, it has USB-C on one end, and an IrDA transceiver on the other.
Why did you make this
I bought a Cipherlab 8001 Mobile Computer at a thrift store, and I want to program it, but I dont want to buy one of the data cradles for it, as they are way too rare and expensive for some pogo pins and an IrDA transceiver, so now we have this, which can be used for much more than the thing I built it for.
How do I use it
Well that depends on what you're using it for, but you plug it into your computer, and open up whatever program wants an IrDA SIR port, and use it like you would a device from the late 90's early 2000's
Specs
- 115.2 kbp/s max transfer rate
- 870-910 nm wavelength
- 1m max usage distance
- 115200 max baud
Made by Ras_rap for Hackclub Fallout
Parts
38| Qty | Value | Footprint | References |
|---|---|---|---|
| 12 | LOGO | LOGO | G***, G***, G***, G***, G***, G***, G***, G***, G***, G***, G***, G*** |
| 10 | C_Small_US | Capacitor_SMD:C_0402_1005Metric | C1, C2, C3, C4, C5, C6, C7, C8, C9, C10 |
| 6 | R | Resistor_SMD:R_0402_1005Metric | R1, R2, R3, R5, R6, R7 |
| 1 | ASE-xxxMHz | Oscillator:Oscillator_SMD_Abracon_ASE-4Pin_3.2x2.5mm | OSC1 |
| 1 | CP2102N-Axx-xQFN28 | Package_DFN_QFN:QFN-28-1EP_5x5mm_P0.5mm_EP3.35x3.35mm | U1 |
| 1 | MCP2122-E/SN | MCP2122:SOIC8-N_MC_MCH | U2 |
| 1 | TFBS4711-TR1 | TFBS4711 (2):CONN6_4711-TR1_VIS | U3 |
| 1 | USB_C_Plug_USB2.0 | Connector_USB:USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | J1 |
The 33 most common of 38 parts.
Questions
How big is the Girdad PCB?
It measures 20.5 × 35.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Girdad use?
38 parts, built around the TFBS4711-TR1 and MCP2122-E/SN. 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 Girdad KiCad files?
From the ras-rap/girdad repository on GitHub, at the commit this page was made from: the board is girdad.kicad_pcb and its schematic girdad.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Girdad design in my own project?
Its repository states no licence, so its author keeps all rights: ask ras-rap before reusing the design.
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