Sg1000
About the Sg1000 PCB
Sg1000 is an open source PCB design by barbeque, published on GitHub under the CC-BY-NC-4.0 license. It is a 2-layer board measuring 162.2 × 134.6 mm, with 71 components from 54 distinct parts.
Other key parts include the SG-1000-CART, SN76489AN, 74LS32, 27C256 and 74LS573. By type, the board carries 23 resistors, 19 ICs, 12 capacitors, 3 connectors, 3 switches and 2 transistors.
It belongs with the retro computing designs in this gallery.
From the project
A homebrew Sega SG-1000, with an eye towards SC-3000 compatibility
Soggy-1000 is an open-source clone of the Sega SG-1000 home videogame system. The eventual goal of the project is to produce a copy of the SG-1000 main console, and the SK-1100 keyboard, so that the software made for the related Sega SC-3000 home computer can be preserved and enjoyed.
If you want to build and sell a handful of these systems to use up a "minimum board order," let me know. I'll probably be okay with it!
Main components on the Sg1000
Sg1000 bill of materials (BOM)
71 components, 54 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | SG-1000-CART SG-1000-Cart | SG1000_Cart | U1 |
| 1 | SN76489AN | DIP-16_W7.62mm_LongPads | U3 |
| 2 | 74LS32 | DIP-14_W7.62mm_LongPads | U4, U16 |
| 1 | 27C256 | DIP-28_W15.24mm_ZIF_Pads | U5 |
| 1 | 74LS573 | DIP-20_W7.62mm_Socket_LongPads | U6 |
| 1 | 74LS00 | DIP-14_W7.62mm_Socket_LongPads | U7 |
| 1 | Z80CPU | DIP-40_W15.24mm_Socket_LongPads | U9 |
| 2 | AS6C62256-DIP | DIP-28_W15.24mm_Socket_LongPads | U11, U103 |
| 1 | TMS9918A | DIP-40_W15.24mm_Socket_LongPads | U12 |
| 1 | 74LS139 | DIP-16_W7.62mm_LongPads | U13 |
| 1 | 74LS14 | DIP-14_W7.62mm_Socket_LongPads | U17 |
| 2 | 74LS257 | DIP-16_W7.62mm_Socket_LongPads | U18, U21 |
| 1 | 74HCT04 | DIP-14_W7.62mm_Socket_LongPads | U99 |
| 3 | 74HCT574 | DIP-20_W7.62mm_Socket_LongPads | U100, U101, U102 |
| 1 | 2N4401TF 2n4401 | TO-92_Inline_Wide | Q1 |
| 1 | 2n3906 | TO-92_Inline_Wide | Q1c1 |
| 1 | X1062 10.73863MHz | Crystal_HC49-U_Vertical | X2 |
| 1 | USB-B1HSB6 | OST_USB-B1HSB6 | J1 |
| 1 | RCJ-017 RCJ-014 | CUI_RCJ-017 | J2 |
| 1 | RCJ-017 RCJ-013 | CUI_RCJ-017 | J3 |
Show 34 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 0-20pF | Tayda_Variable_Trimmer_Cap | CV1 |
| 1 | 2315-FCC20202AATP 2A | Fuse_0805_2012Metric_Pad1.15x1.40mm_HandSolder | F1 |
| 2 | DB9_FEMALE DB9_Female | Assman-A-DS_09_A-KG-T2S-Correct | JOY1, JOY2 |
| 1 | 679-2428 Pause Key | SW_PUSH_6mm | SW1 |
| 1 | 401-1132 Power Toggle | PVA1_Switch | SW2 |
| 1 | 679-2428 Reset Key | SW_PUSH_6mm | SW3 |
| 1 | 641-1310-1 D | D_A-405_P7.62mm_Horizontal | D1 |
| 1 | 1497-1022 LED | LED_D3.0mm | D2 |
| 2 | FerriteBead_Small | L_1206_3216Metric_Pad1.22x1.90mm_HandSolder | FB1, FB16 |
| 2 | 1276-1099-1 0.1µF | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C1, C2 |
| 1 | 493-1037 22µF | CP_Radial_D5.0mm_P2.50mm | C3 |
| 1 | 1276-1099-1 0.22µF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C4 |
| 1 | 493-15121 220µF | CP_Radial_D6.3mm_P2.50mm | C5 |
| 1 | 1276-1298-1 10µF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C6 |
| 2 | 732-7817-1 33pF | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C7, C8 |
| 2 | 1276-1099-1 0.1µF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C9, C100 |
| 1 | 0.1µF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C16 |
| 1 | 6800pF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C17 |
| 1 | RMCF0805JT100R 100Ω | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R1 |
| 2 | RMCF0805JT560R 560Ω | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2, R9 |
| 1 | RMCF0805JT47K0 47kΩ | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R3 |
| 1 | RMCF0805FT1K00 1kΩ | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R4 |
| 1 | RMCF0805ZT0R00 0Ω | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R7 |
| 1 | RMCF0805JT1M00 1MΩ | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R8 |
| 1 | RMCF0805FT1K00 975Ω | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R10 |
| 1 | RMCF0805JT470R 470Ω | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R11 |
| 1 | RMCF0805FT1K00 1kΩ | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R12 |
| 2 | RMCF0805JT330R 330Ω | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R13, R15 |
| 1 | RMCF0805JT75R0 75Ω | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R14 |
| 2 | RMCF0805JT10K0 10kΩ | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R16, R17 |
| 2 | 10kΩ | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R18, R21 |
| 3 | 47kΩ | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R19, R20, R23 |
| 1 | 100kΩ | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R22 |
| 2 | R_NETWORK06_US 4.7kΩ | R_Array_SIP7 | RN1, RN2 |
Sg1000 design files
The KiCad project lives in the barbeque/sg1000 repository on GitHub; these links point at the commit this page was built from.
- Layoutsg1000.kicad_pcb
- Schematicsg1000.kicad_sch
- BOMsg1000-v0.3-bom.csv
Sg1000: common questions
How big is the Sg1000 PCB?
The Sg1000 measures 162.2 × 134.6 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Sg1000?
71 components, from 54 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Sg1000 design files?
From the barbeque/sg1000 repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Sg1000 design in my own project?
It is published under CC-BY-NC-4.0, which limits how it may be reused; read the license before building on it.
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