2 layers58.4 × 35.9 mm
2 layers58.4 × 68.4 mm
Cbm2rrcart
sjgray/CBM-II-Carts6My CBM-II cartridge designs plus cloned carts
- Size
- 58.4 × 68.4 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 13
- Nets
- 50
- Pads
- 163
- Tracks, vias
- 653, 39
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 6 Apr 2025
- Updated
- 18 Jul 2025
Overview
Cbm2rrcart is an open-source printed circuit board by sjgray, from the sjgray/CBM-II-Carts repository on GitHub. It is a 2-layer board of 58.4 × 68.4 mm with 13 parts on 50 nets, routed with 653 tracks and 39 vias.
It is built around the 74LS148P-E. Its parts include 4 ICs, 3 capacitors, 3 connectors and 1 switch.
Main components
1Parts
13| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | 0.1uf | Capacitor_THT:C_Disc_D3.4mm_W2.1mm_P2.50mm | C2, C3, C4 |
| 2 | 4K7 | Resistor_THT:R_Array_SIP7 | RN1, RN2 |
| 1 | 27C020 | Package_DIP:DIP-32_W15.24mm_LongPads | U2 |
| 1 | 7400 | Package_DIP:DIP-14_W7.62mm_LongPads | U4 |
| 1 | 74LS148 | Package_DIP:DIP-16_W7.62mm_LongPads | U1 |
| 1 | EXT. CS HEADER | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J2 |
| 1 | MEMOPT | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J1 |
| 1 | SW_DIP_x06 | Button_Switch_THT:SW_DIP_SPSTx06_Piano_10.8x16.8mm_W7.62mm_P2.54mm | SW1 |
| 1 | UM61512A | Package_DIP:DIP-32_W7.62mm | U3 |
| 1 | cbm-ii-cartedge | footprint:CBM2-Cart-Edge | P1 |
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Questions
How big is the Cbm2rrcart PCB?
It measures 58.4 × 68.4 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Cbm2rrcart use?
13 parts, built around the 74LS148P-E. 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 Cbm2rrcart KiCad files?
From the sjgray/CBM-II-Carts repository on GitHub, at the commit this page was made from: the board is RAMROMCart/cbm2rrcart.kicad_pcb and its schematic RAMROMCart/cbm2rrcart.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Cbm2rrcart design in my own project?
Its repository states no licence, so its author keeps all rights: ask sjgray before reusing the design.