2 layers148 × 118.7 mm
2 layers133 × 75 mm
Printer Buffer
agben/Silicon-Heaven2The afterlife for obsolete equipment and software
- Size
- 133 × 75 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 12
- Nets
- 92
- Pads
- 200
- Tracks, vias
- 383, 49
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 22 Aug 2023
- Updated
- 29 Sep 2025
Overview
Printer Buffer is an open-source printed circuit board by agben, from the agben/Silicon-Heaven repository on GitHub. It is a 2-layer board of 133 × 75 mm with 12 parts on 92 nets, routed with 383 tracks and 49 vias.
It is built around the 74LS02PC and 74LS374PC. Its parts include 7 ICs, 3 capacitors and 2 connectors.
Main components
2README
README.mdSilicon Heaven
The afterlife for obsolete equipment and software.
For more on each entry see www.benningtons.net/index.php/category/silicon-heaven
Parts
12| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 47nF | Print-Buffer:C_Rect_L7.0mm_W2.0mm_P5.00mm | C2, C3 |
| 1 | 1nF | Print-Buffer:C_Rect_L7.0mm_W2.0mm_P5.00mm | C1 |
| 1 | 7404 | Print-Buffer:DIP-14_W7.62mm | U7 |
| 1 | 74121 | Print-Buffer:DIP-14_W7.62mm | U4 |
| 1 | 74125 | Print-Buffer:DIP-14_W7.62mm | U3 |
| 1 | 74LS02 | Print-Buffer:DIP-14_W7.62mm | U6 |
| 1 | 74LS138 | Print-Buffer:DIP-16_W7.62mm | U5 |
| 1 | 74LS374 | Print-Buffer:DIP-20_W7.62mm | U2 |
| 1 | Apple-II-Expansion-Slot | Print-Buffer:Connector_2x25_P1.27mm_Polarized_Edge | J1 |
| 1 | CONN_13X2 | Print-Buffer:IDC-Header_2x13_P2.54mm_Vertical_Lock | J2 |
| 1 | HM6116 | Print-Buffer:DIP-24_W15.24mm | U1 |
Questions
How big is the Printer Buffer PCB?
It measures 133 × 75 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Printer Buffer use?
12 parts, built around the 74LS02PC and 74LS374PC. 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 Printer Buffer KiCad files?
From the agben/Silicon-Heaven repository on GitHub, at the commit this page was made from: the board is Apple-II/Print-Buffer/Printer-Buffer.kicad_pcb and its schematic Acorn-Electron/Cumana-Disk-Interface/Cumana-Disk-Interface.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Printer Buffer design in my own project?
Its repository states no licence, so its author keeps all rights: ask agben before reusing the design.
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