2 layers162.2 × 134.6 mm
2 layers72 × 50.8 mm
Basic3
barbeque/sg100033A homebrew Sega SG-1000, with an eye towards SC-3000 compatibility
- Size
- 72 × 50.8 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 10
- Nets
- 47
- Pads
- 117
- Tracks, vias
- 366, 58
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 27 Mar 2020
- Updated
- 18 Oct 2026
Overview
Basic3 is an open-source printed circuit board by barbeque, from the barbeque/sg1000 repository on GitHub. It is a 2-layer board of 72 × 50.8 mm with 10 parts on 47 nets, routed with 366 tracks and 58 vias.
Its parts include 3 ICs, 2 capacitors and 1 switch. It belongs with the retro computing and games boards of this library.
README
cartridges/basic-iiib/README.mdThis folder contains the kicad source files to construct a clone of the Sega SC-3000 BASIC IIIB cartridge that uses UM61512 SRAM instead of the original DRAM, which makes it also compatible with the SK-1100-equipped SG-1000.
Parts
10| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 0.1µF | Capacitor_THT:C_Disc_D6.0mm_W2.5mm_P5.00mm | C1, C2 |
| 2 | Jumper_2_Bridged | Jumper:SolderJumper-2_P1.3mm_Bridged2Bar_RoundedPad1.0x1.5mm | JP1, JP3 |
| 1 | 27C512 | Package_DIP:DIP-28_W15.24mm | U1 |
| 1 | LOGO | Logos:Soggy | G*** |
| 1 | SG-1000-Cart | SoggyCartridge:CartridgeEdge | U2 |
| 1 | SW_SPDT | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | SW1 |
| 1 | SolderJumper_2_Bridged | Jumper:SolderJumper-2_P1.3mm_Bridged2Bar_RoundedPad1.0x1.5mm | JP2 |
| 1 | UM61512 | Package_DIP:DIP-32_W7.62mm | U3 |
Questions
How big is the Basic3 PCB?
It measures 72 × 50.8 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Basic3 use?
10 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 Basic3 KiCad files?
From the barbeque/sg1000 repository on GitHub, at the commit this page was made from: the board is cartridges/basic-iiib/basic3.kicad_pcb and its schematic cartridges/basic-iiib/basic3.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Basic3 design in my own project?
Its repository states no licence, so its author keeps all rights: ask barbeque before reusing the design.
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