SBC3.2
About the SBC3.2 PCB
SBC3.2 is an open source PCB design by jacobtohahn, published on GitHub under the CERN-OHL-S-2.0 license. It is a 2-layer board measuring 127 × 96.5 mm, with 67 components from 28 distinct parts.
Other key parts include the Z80CPU, Z80SIO0, 28C256, Z80PIO and AS6C62256. By type, the board carries 24 resistors, 12 capacitors, 11 connectors, 9 ICs, 6 jumpers and 2 crystals.
It belongs with the retro computing designs in this gallery.
From the project
A Z80 computer system
This folder is a work in progress. The Getting Started guide has not been created yet. Check back soon!
Main components on the SBC3.2
SBC3.2 bill of materials (BOM)
67 components, 28 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | Z80CPU | DIP-40_W15.24mm | U1 |
| 1 | Z80SIO0 | DIP-40_W15.24mm | U2 |
| 1 | 28C256 | DIP-28_W15.24mm | U3 |
| 1 | Z80PIO | DIP-40_W15.24mm | U4 |
| 1 | AS6C62256 | DIP-28_W15.24mm | U5 |
| 1 | Z80CTC | DIP-28_W15.24mm | U6 |
| 1 | 74HC139 | DIP-16_W7.62mm | U7 |
| 1 | ULN2803A | DIP-18_W7.62mm | U8 |
| 1 | 74HC138 | DIP-16_W7.62mm | U9 |
| 1 | SYS_CLK | Oscillator_DIP-8 | X1 |
| 1 | 1.8432MHz | Oscillator_DIP-8 | X2 |
| 1 | ZTO-80 Bus | PinHeader_2x20_P2.54mm_Vertical | J1 |
| 3 | Conn_01x02 | PinHeader_1x02_P2.54mm_Vertical | J2, J10, J11 |
| 1 | 5V_IN | BarrelJack_CUI_PJ-102A_Horizontal | J3 |
| 1 | CPUHDR | PinHeader_1x09_P2.54mm_Vertical | J4 |
| 1 | CTCHDR | PinHeader_1x08_P2.54mm_Vertical | J5 |
| 2 | SIOHDR | PinHeader_1x06_P2.54mm_Vertical | J6, J9 |
| 2 | PIOHDR | PinHeader_2x05_P2.54mm_Vertical | J7, J8 |
| 6 | Jumper_2_Open | PinHeader_1x02_P2.54mm_Vertical | JP1, JP2, JP3, JP4, JP5, JP6 |
| 1 | Reset | SW_PUSH_6mm | SW1 |
Show 8 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | PWR_LED | LED_D3.0mm | D1 |
| 1 | RUN_LED | LED_D3.0mm | D2 |
| 11 | 0.1u | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C1, C2, C3, C4, C5, C6, C7, C8 +3 |
| 1 | 10u | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C12 |
| 10 | 10k | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R1, R2, R4, R11, R12, R13, R14, R15 +2 |
| 2 | 220 | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R3, R5 |
| 8 | 2.2k | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R6, R8, R9, R10, R17, R19, R20, R21 |
| 4 | 100k | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R7, R16, R18, R22 |
SBC3.2 design files
The KiCad project lives in the jacobtohahn/ZTO-80 repository on GitHub; these links point at the commit this page was built from.
- LayoutPCB/SBC/v3.2/SBC3.2.kicad_pcb
- SchematicPCB/SBC/v3.2/SBC3.2.kicad_sch
SBC3.2: common questions
How big is the SBC3.2 PCB?
The SBC3.2 measures 127 × 96.5 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the SBC3.2?
67 components, from 28 distinct parts. The full bill of materials is listed on this page.
Where can I download the SBC3.2 design files?
From the jacobtohahn/ZTO-80 repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the SBC3.2 design in my own project?
Yes, under the terms of its CERN-OHL-S-2.0 license, which jacobtohahn chose for the repository.
More boards in ZTO-80
SBC3.1
127 × 96.5 mm67 parts2LCERN-OHL-S-2.020
ZTO-80 SIO
99.1 × 57.2 mm32 parts2LCERN-OHL-S-2.020
ZTO-80 SBC Backplane 5
99.1 × 91.4 mm28 parts2LCERN-OHL-S-2.020
ZTO-80 Backplane 5
99.1 × 91.4 mm25 parts2LCERN-OHL-S-2.020
ZTO-80 CPU
99.1 × 57.2 mm24 parts2LCERN-OHL-S-2.020
ZTO-80 CTC
99.1 × 57.2 mm17 parts2LCERN-OHL-S-2.020
ZTO-80 Memory
99.1 × 57.2 mm10 parts2LCERN-OHL-S-2.020
ZTO-80 Template
99.1 × 57.2 mm4 parts2LCERN-OHL-S-2.020
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