4 layers165.5 × 51.6 mm
Panel
AlphaCassiopeiae/8800
Firmware and PCBs for aCassiopeiae, a minature Altair 8800 clone
222 parts1
2 layers220 × 160 mm
Backplane
AlphaCassiopeiae/88001Firmware and PCBs for aCassiopeiae, a minature Altair 8800 clone
- Size
- 220 × 160 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 25
- Nets
- 234
- Pads
- 1,311
- Tracks, vias
- 1,466, 642
- Pours
- 9
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 27 Jan 2025
- Updated
- 30 Apr 2025
Overview
Backplane is an open-source printed circuit board by AlphaCassiopeiae, from the AlphaCassiopeiae/8800 repository on GitHub. It is a 2-layer board of 220 × 160 mm with 25 parts on 234 nets, routed with 1,466 tracks and 642 vias.
It is built around the 10145891-0320J13LF and USB4105-GF-A. Its parts include 6 connectors, 5 resistors, 3 diodes, 1 IC and 1 switch.
Main components
2Parts
25| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 10145891-0320J13LF | Library:AMPHENOL_10145891-0320J13LF | J1, J2, J3, J4 |
| 2 | 10u | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | Cln_1, Cln_2 |
| 2 | 10u | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | Cout_1, Cout_2 |
| 2 | 150 | Resistor_SMD:R_0402_1005Metric | R4, R5 |
| 2 | 5.1k | Resistor_SMD:R_0402_1005Metric | R1, R2 |
| 2 | HEARTBEAT | LED_SMD:LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D2, D4 |
| 1 | 10 | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R3 |
| 1 | 100n | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | CB1 |
| 1 | 10k | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | RBot1 |
| 1 | 15u | Library:DR73-150-R | L1 |
| 1 | 1N4148 | Diode_SMD:D_0402_1005Metric_Pad0.77x0.64mm_HandSolder | DB1 |
| 1 | 31.6k | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | RTop1 |
| 1 | 500SSP1S1M7QEA | Library:SW_500SSP1S1M7QEA | S1 |
| 1 | 5017868090 | Library:CON_5017868090 | J6 |
| 1 | D_Schottky | Library:DO-214BA_MCH-L | D1 |
| 1 | MCP16331x-xCH | Package_TO_SOT_SMD:SOT-23-6 | U1 |
| 1 | USB4105-GF-A | Library:GCT_USB4105-GF-A | J5 |
Questions
How big is the Backplane PCB?
It measures 220 × 160 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Backplane use?
25 parts, built around the 10145891-0320J13LF and USB4105-GF-A. 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 Backplane KiCad files?
From the AlphaCassiopeiae/8800 repository on GitHub, at the commit this page was made from: the board is ecad/backplane/backplane.kicad_pcb and its schematic ecad/backplane/backplane.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Backplane design in my own project?
Its repository states no licence, so its author keeps all rights: ask AlphaCassiopeiae before reusing the design.
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