MinimalZ80
About the MinimalZ80 PCB
MinimalZ80 is an open source PCB design by 89Mods, published on GitHub under the MIT license. It is a 2-layer board measuring 132.6 × 60.5 mm, with 34 components from 16 distinct parts.
Other key parts include the 74HC00, 74HC02, Z80CPU, SM420561N and 74LS573. By type, the board carries 16 resistors, 8 ICs, 4 switches, 3 connectors, 1 crystal and 1 diode.
From the project
Misc microcomputer projects
Contains hardware schematics and PCB design files (if applicable) for each computer, as well as example software.
I hope this repo will help people with building their own computers. You can either re-build one of the systems from here, or reference my code and schematics when designing your own.
Main components on the MinimalZ80
MinimalZ80 bill of materials (BOM)
34 components, 16 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 74HC00 | DIP-14_W7.62mm | U1 |
| 1 | 74HC02 | DIP-14_W7.62mm | U2 |
| 1 | Z80CPU | DIP-40_W15.24mm | U3 |
| 1 | SM420561N | 7SegmentLED_LTS6760_LTS6780 | U4 |
| 1 | 74LS573 | DIP-20_W7.62mm | U5 |
| 1 | 28C256 | DIP-28_W15.24mm | U6 |
| 1 | CDP1824 | DIP-18_W7.62mm | U7 |
| 1 | 74HC240 | DIP-20_W7.62mm | U8 |
| 1 | CXO_DIP8 | Oscillator_DIP-8 | X1 |
| 1 | Screw_Terminal_01x02 | TerminalBlock_bornier-2_P5.08mm | J1 |
| 2 | Conn_01x08_Female | PinHeader_1x08_P2.54mm_Vertical | J2, J3 |
| 4 | SW_Push_Dual | SW_PUSH_6mm_H7.3mm | SW1, SW2, SW3, SW4 |
| 1 | LED | LED_D3.0mm_FlatTop | D1 |
| 1 | 100µF | CP_Radial_D4.0mm_P2.00mm | C1 |
| 15 | 10K | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R1, R2, R3, R4, R5, R7, R8, R9 +7 |
| 1 | 1K | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R6 |
MinimalZ80 design files
The KiCad project lives in the 89Mods/misc-computers repository on GitHub; these links point at the commit this page was built from.
MinimalZ80: common questions
How big is the MinimalZ80 PCB?
The MinimalZ80 measures 132.6 × 60.5 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the MinimalZ80?
34 components, from 16 distinct parts. The full bill of materials is listed on this page.
Where can I download the MinimalZ80 design files?
From the 89Mods/misc-computers repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the MinimalZ80 design in my own project?
Yes, under the terms of its MIT license, which 89Mods chose for the repository.
