Zeta sbc
About the Zeta sbc PCB
Zeta sbc is an open source PCB design by skiselev, published on GitHub under the GPL-3.0 license. It is a board measuring 170.2 × 100 mm, with 74 components from 45 distinct parts.
Other key parts include the Z84C00, ST39SF040, AS6C4008, PC16550D and CP82C55A. By type, the board carries 26 capacitors, 22 ICs, 6 connectors, 4 resistors, 3 diodes and 2 jumpers.
It belongs with the retro computing designs in this gallery.
From the project
Zeta SBC is an Zilog Z80 based single board computer. It is inspired by Ampro Little Board Z80 and N8VEM project. Zeta SBC is software compatible with RomWBW Firmware
Zeta SBC V2 is a redesigned version of Zeta SBC. Compared to the first version this version features updated MMU with four banks, each one of those banks can be mapped to any 16 KiB page in 1 MiB on-board memory. It adds Z80 CTC which is used for generating periodic interrupts and as a vectored interrupt controller for UART and PPI. The FDC is replaced with 37C65. Compared to FDC9266 used in Zeta SBC it integrates input/output buffers and floppy disk control latch. Additionally 37C65 FDC is easier to obtain than FDC9266. And lastly it is made using CMOS technology and more power efficient…
Main components on the Zeta sbc
Zeta sbc bill of materials (BOM)
74 components, 45 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | Z84C00 | IC_DIP40_600 | U1 |
| 1 | ST39SF040 | IC_DIP32_600 | U2 |
| 1 | AS6C4008 | IC_DIP32_600 | U3 |
| 1 | PC16550D | IC_DIP40_600 | U4 |
| 1 | CP82C55A | IC_DIP40_600 | U5 |
| 1 | WD37C65C | IC_DIP40_600 | U6 |
| 1 | Z84C30 | IC_DIP28_600 | U7 |
| 2 | 74LS670 | IC_DIP16_300 | U8, U9 |
| 1 | 74LS174 | IC_DIP16_300 | U10 |
| 1 | 74ALS139 | IC_DIP16_300 | U11 |
| 1 | 74LS138 | IC_DIP16_300 | U12 |
| 1 | 74LS125 | IC_DIP14_300 | U13 |
| 1 | 74LS74 | IC_DIP14_300 | U14 |
| 1 | 74LS32 | IC_DIP14_300 | U15 |
| 1 | 74LS14 | IC_DIP14_300 | U16 |
| 1 | 8MHz | OSC_Full_Half_Can_DIP14 | U17 |
| 1 | 1.8432 | OSC_Full_Half_Can_DIP14 | U18 |
| 1 | 16MHz | OSC_Full_Half_Can_DIP14 | U19 |
| 1 | MAX202 | IC_DIP16_300 | U20 |
| 1 | DS1302 | IC_DIP8_300 | U21 |
Show 25 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | DS1210 | IC_DIP8_300 | U22 |
| 1 | 32768Hz | CRYSTAL32768 | X1 |
| 1 | POWER | Conn_Power_Jack | P1 |
| 1 | RESET | Conn_Pin_Header_2x1_2.54mm_NoKey | P2 |
| 1 | SERIAL | Conn_Dsub_DE9M | P3 |
| 1 | PARALLEL | pin_array_13x2 | P4 |
| 1 | FLOPPY | Conn_Pin_Header_17x2_2.54mm_Shrouded | P5 |
| 1 | 5V | Conn_Friction_Lock_2P_2.54mm | P6 |
| 1 | CR2032 | Battery_Holder_CR2032_Universal | BT1 |
| 4 | CONN_1 | HOLE_3MM | HOLE1, HOLE2, HOLE3, HOLE4 |
| 1 | CONFIG | Conn_Pin_Header_2x1_2.54mm_NoKey | JP1 |
| 1 | PIN25 GND/VCC | Conn_Pin_Header_3x1_2.54mm | JP2 |
| 2 | 1k | Conn_SIL6 | RR1, RR2 |
| 2 | 4.7k | Conn_SIL6 | RR3, RR4 |
| 1 | RESET | Switch_Tactile_6mm_Right | SW1 |
| 1 | 1N4148 | Diode_762 | D1 |
| 1 | PWR | Conn_Pin_Header_2x1_2.54mm | D2 |
| 1 | HALT | Conn_Pin_Header_2x1_2.54mm | D3 |
| 19 | 0.1uF | Cap_Cer_508 | C1, C2, C3, C4, C5, C6, C7, C8 +11 |
| 5 | 0.1uF | Cap_Pol_508_3 | C20, C21, C22, C23, C24 |
| 1 | 47uF | Cap_Elec_Radial_5mm | C25 |
| 1 | 10uF | Cap_Pol_508_3 | C26 |
| 1 | 10 | Res_762 | R1 |
| 1 | 10k | Res_762 | R2 |
| 2 | 470 | Res_762 | R3, R4 |
Zeta sbc design files
The KiCad project lives in the skiselev/zeta_sbc repository on GitHub; these links point at the commit this page was built from.
- LayoutKiCad/Z80-SBC.kicad_pcb
Zeta sbc: common questions
How big is the Zeta sbc PCB?
The Zeta sbc measures 170.2 × 100 mm and is 1.6002 mm thick.
How many components are on the Zeta sbc?
74 components, from 45 distinct parts. The full bill of materials is listed on this page.
Where can I download the Zeta sbc design files?
From the skiselev/zeta_sbc repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Zeta sbc design in my own project?
Yes, under the terms of its GPL-3.0 license, which skiselev chose for the repository.
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