2 layers99.1 × 99.1 mm
Vga
rjw57/simplest-80s-computer
This is my rough scratch repo where I keep experiments to do with desiging 80s computer peripherals. It is not in any sensible shape to be used by others yet, apologies.
45 parts
2 layers99.1 × 99.1 mm
Computer
rjw57/simplest-80s-computerThis is my rough scratch repo where I keep experiments to do with desiging 80s computer peripherals. It is not in any sensible shape to be used by others yet, apologies.
- Size
- 99.1 × 99.1 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 39
- Nets
- 71
- Pads
- 326
- Tracks, vias
- 0, 0
- Pours
- 2
- Routed
- Not yet
- KiCad
- KiCad 4
- Created
- 15 Apr 2018
- Updated
- 28 Jul 2018
Overview
Computer is an open-source printed circuit board by rjw57, from the rjw57/simplest-80s-computer repository on GitHub. It is a 2-layer board of 99.1 × 99.1 mm with 39 parts on 71 nets.
It is built around the 74HC595, 74HC573 and 74HC27D, with the 74HC30S among its other parts. Its parts include 13 connectors, 10 ICs, 9 capacitors and 6 resistors.
Main components
4
74HC595
SOP-16-40℃~+85℃ 1 100ns@5V,50pF 10MHz 2V~6V 74HC 8 Serial-to-Serial or Parallel Tri-State SOP-16 Shift Registers ROHSGRShift Registers
74HC573
SOP-20-40℃~+85℃ 14ns 1ns 2V~6V 4ns 74HC 8 8uA D Latch Tri-State SOP-20 Latches ROHSHXY MOSFETLatches
74HC27D
SOP-14-40℃~+125℃ 1.5V~4.2V 1.9V~2V、3.98V~4.32V、4.4V~4.5V、5.48V~5.81V、5.9V~6V 100mV、100mV、100mV、260mV、260mV 18ns@4.5V,50pF 2V~6V 2uA 3 3 5.2mA 5.2mA 500mV~1.8V 74HC Series NOR Gate SOIC-14 Logic Gates ROHSNexperiaGates74HC30S
SOP-140℃~+60℃ 1 1.5V~4.2V 1.9V~5.9V 100mV 25ns@5.0V,15pF 2V~6V 5.2mA 5.2mA 5.5uA 500mV~1.8V 74HC Series 8 NAND Gate Push-pull SOP-14 Logic Gates ROHSGRLogic Gates
README
README.mdExperimental repo for retro computing
This is my rough scratch repo where I keep experiments to do with desiging 80s computer peripherals. It is not in any sensible shape to be used by others yet, apologies.
Parts
39| Qty | Value | Footprint | References |
|---|---|---|---|
| 9 | 100n | Capacitors_THT:C_Disc_D5.0mm_W2.5mm_P2.50mm | C1, C2, C3, C4, C5, C6, C7, C8, C9 |
| 6 | 330R | Resistors_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R2, R3, R4, R5, R6 |
| 4 | MOUNT | Mounting_Holes:MountingHole_3.2mm_M3_Pad | J1, J2, J3, J4 |
| 3 | 74HC595 | Housings_DIP:DIP-16_W7.62mm_Socket_LongPads | U4, U5, U6 |
| 2 | 74HC573 | Housings_DIP:DIP-20_W7.62mm_Socket_LongPads | U9, U10 |
| 1 | 74HC27 | Housings_DIP:DIP-14_W7.62mm_Socket_LongPads | U8 |
| 1 | 74HC30 | Housings_DIP:DIP-14_W7.62mm_Socket_LongPads | U7 |
| 1 | ADDR1 | Pin_Headers:Pin_Header_Straight_1x08_Pitch2.54mm | J9 |
| 1 | ADDR2 | Pin_Headers:Pin_Header_Straight_1x08_Pitch2.54mm | J8 |
| 1 | AS6C4008 | Housings_DIP:DIP-32_W15.24mm_Socket_LongPads | U2 |
| 1 | CPU1 | Pin_Headers:Pin_Header_Straight_1x08_Pitch2.54mm | J11 |
| 1 | CPU2 | Pin_Headers:Pin_Header_Straight_1x08_Pitch2.54mm | J12 |
| 1 | DATA | Pin_Headers:Pin_Header_Straight_1x08_Pitch2.54mm | J10 |
| 1 | NANO | Pin_Headers:Pin_Header_Straight_1x08_Pitch2.54mm | J13 |
| 1 | NANO PWR | Pin_Headers:Pin_Header_Straight_1x02_Pitch2.54mm | JP1 |
| 1 | Nano | Modules:Arduino_Nano | U3 |
| 1 | PORTA | Pin_Headers:Pin_Header_Straight_1x08_Pitch2.54mm | J6 |
| 1 | PORTB | Pin_Headers:Pin_Header_Straight_1x08_Pitch2.54mm | J7 |
| 1 | POWER | Pin_Headers:Pin_Header_Straight_1x08_Pitch2.54mm | J5 |
| 1 | Z84C00 | Housings_DIP:DIP-40_W15.24mm_Socket_LongPads | U1 |
Questions
How big is the Computer PCB?
It measures 99.1 × 99.1 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Computer use?
39 parts, built around the 74HC595, 74HC573, 74HC27D and 74HC30S. 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 Computer KiCad files?
From the rjw57/simplest-80s-computer repository on GitHub, at the commit this page was made from: the board is hw/computer.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Computer design in my own project?
Its repository states no licence, so its author keeps all rights: ask rjw57 before reusing the design.
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