2 layers77 × 97 mm
Rgb to hdmi
hoglet67/RGBtoHDMI
Bare-metal Raspberry Pi project that provides pixel-perfect sampling of Retro Computer RGB/YUV video and conversion to HDMI
76 parts1kGPL-3.0
2 layers59.9 × 25.7 mm
Buffer
hoglet67/RGBtoHDMI1kBare-metal Raspberry Pi project that provides pixel-perfect sampling of Retro Computer RGB/YUV video and conversion to HDMI
- Size
- 59.9 × 25.7 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 8
- Nets
- 19
- Pads
- 38
- Tracks, vias
- 187, 9
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 24 Apr 2017
- Updated
- 18 May 2026
Overview
Buffer is an open-source printed circuit board by hoglet67, from the hoglet67/RGBtoHDMI repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 59.9 × 25.7 mm with 8 parts on 19 nets, routed with 187 tracks and 9 vias.
Its parts include 6 connectors and 1 diode. It belongs with the interfaces and adapters and lEDs and displays boards of this library.
README
README.mdRGBtoHDMI
The RGBtoHDMI interface converts the "digital" RGB video signal from the BBC Micro or Electron to HDMI compatible with most modern TV/Monitors. The interface comprises a Raspberry Pi Zero and a specially designed Hat containing a small CPLD. Custom firmware on the Raspberry Pi, in conjunction with the CPLD, is able to correctly sample each of the Beeb's video modes to give a pixel-perfect rendition.
For more information, see the project Wiki.
Parts
8| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | Conn_01x01 | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | P6, P7 |
| 1 | Conn_01x04 | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | P2 |
| 1 | Conn_01x08_even | Connector_Harwin:Harwin_M20-89006xx_1x08_P2.54mm_Horizontal_EVEN | P5 |
| 1 | Conn_01x08_odd | Connector_Harwin:Harwin_M20-89006xx_1x08_P2.54mm_Horizontal_ODD | P4 |
| 1 | Conn_02x06_Odd_Even | Connector_PinSocket_2.54mm:PinSocket_2x06_P2.54mm_Horizontal | P1 |
| 1 | D_Schottky | Diode_SMD:D_SOD-123 | D1 |
| 1 | SolderJumper_2_Open | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP5 |
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Bare-metal Raspberry Pi project that provides pixel-perfect sampling of Retro Computer RGB/YUV video and conversion to HDMI
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hoglet67/RGBtoHDMI
Bare-metal Raspberry Pi project that provides pixel-perfect sampling of Retro Computer RGB/YUV video and conversion to HDMI
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hoglet67/RGBtoHDMI
Bare-metal Raspberry Pi project that provides pixel-perfect sampling of Retro Computer RGB/YUV video and conversion to HDMI
22 parts1kGPL-3.0 - 2 layers67.6 × 30.5 mm
Rgb to hdmi
hoglet67/RGBtoHDMI
Bare-metal Raspberry Pi project that provides pixel-perfect sampling of Retro Computer RGB/YUV video and conversion to HDMI
20 parts1kGPL-3.0
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Questions
How big is the Buffer PCB?
It measures 59.9 × 25.7 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Buffer use?
8 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 Buffer KiCad files?
From the hoglet67/RGBtoHDMI repository on GitHub, at the commit this page was made from: the board is kicad_Extender_12_bit_adapter/V1/buffer.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Buffer design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).