2 layers20.3 × 27.9 mm
2 layers155.1 × 97.8 mm
Mini-8085
89Mods/8085SBC1Experimental 8085 single-board computer
- Size
- 155.1 × 97.8 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 67
- Nets
- 97
- Pads
- 376
- Tracks, vias
- 887, 86
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 1 Aug 2023
- Updated
- 17 Jan 2024
Overview
Mini-8085 is an open-source printed circuit board by 89Mods, from the 89Mods/8085SBC repository on GitHub, published under the MIT licence. It is a 2-layer board of 155.1 × 97.8 mm with 67 parts on 97 nets, routed with 887 tracks and 86 vias.
It is built around the 74LS573PC and NE555P. Its parts include 29 resistors, 11 diodes, 8 ICs, 7 capacitors and 7 connectors. It belongs with the computers and single-board computers boards and the FPGA and CPLD boards of this library.
Main components
2README
README.md8085 SBC
This repo contains all the source files for my i8085 SBC. For more information, see the READMEs in the sub-directories, and the writeup on my website.
Parts
67| Qty | Value | Footprint | References |
|---|---|---|---|
| 14 | 10K | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R7, R8, R9, R10, R11, R12, R13, R14, R22, R23, R24, R25, R26, R27 |
| 13 | 1K | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R1, R2, R3, R4, R5, R6, R15, R18, R19, R20, R21, R28, R29 |
| 10 | LED | LED_THT:LED_D3.0mm | D1, D2, D3, D4, D5, D6, D7, D8, D9, D10 |
| 4 | 10nF | Capacitor_THT:C_Disc_D4.3mm_W1.9mm_P5.00mm | C1, C2, C3, C6 |
| 4 | SW_Push | Button_Switch_THT:SW_PUSH_6mm_H7.3mm | SW1, SW2, SW3, SW4 |
| 2 | 100R | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R16, R17 |
| 2 | 74LS573 | Package_DIP:DIP-20_W7.62mm | U3, U8 |
| 2 | Conn_01x18_Female | Connector_PinHeader_2.54mm:PinHeader_1x18_P2.54mm_Vertical | J5, J6 |
| 1 | 10µF | Capacitor_THT:CP_Radial_D4.0mm_P1.50mm | C4 |
| 1 | 1µF | Capacitor_THT:CP_Radial_D4.0mm_P1.50mm | C7 |
| 1 | 28C256 | Package_DIP:DIP-28_W15.24mm | U2 |
| 1 | 30pF | Capacitor_THT:C_Disc_D3.4mm_W2.1mm_P2.50mm | C5 |
| 1 | 8085 | Package_DIP:DIP-40_W15.24mm | U1 |
| 1 | 81C55 | Package_DIP:DIP-40_W15.24mm | U6 |
| 1 | Conn_01x03_Female | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J2 |
| 1 | Conn_01x04_Male | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J4 |
| 1 | Conn_01x05_Socket | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical | J7 |
| 1 | Conn_01x06_Male | Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical | J3 |
| 1 | Crystal | Crystal:Resonator-2Pin_W7.0mm_H2.5mm | Y1 |
| 1 | D | Diode_THT:D_A-405_P12.70mm_Horizontal | D11 |
| 1 | GAL22V10 | Package_DIP:DIP-24_W7.62mm | U7 |
| 1 | IS61C256 | Package_DIP:DIP-28_W7.62mm | U4 |
| 1 | NE555P | Package_DIP:DIP-8_W7.62mm | U5 |
| 1 | Screw_Terminal_01x02 | TerminalBlock:TerminalBlock_bornier-2_P5.08mm | J1 |
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Questions
How big is the Mini-8085 PCB?
It measures 155.1 × 97.8 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Mini-8085 use?
67 parts, built around the 74LS573PC and NE555P. 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 Mini-8085 KiCad files?
From the 89Mods/8085SBC repository on GitHub, at the commit this page was made from: the board is HW/mini-8085/mini-8085.kicad_pcb and its schematic HW/i2c-cartridge/i2c-cartridge.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Mini-8085 design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).