2 layers90.2 × 99.1 mm
Control logic
codemonkey76/DIY-8-Bit-Computer
DIY 8-Bit Computer, based on the design by Ben Eater
94 parts
2 layers72.4 × 74.9 mm
Output register
codemonkey76/DIY-8-Bit-ComputerDIY 8-Bit Computer, based on the design by Ben Eater
- Size
- 72.4 × 74.9 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 35
- Nets
- 45
- Pads
- 185
- Tracks, vias
- 654, 58
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 25 Aug 2019
- Updated
- 25 Aug 2019
Overview
Output register is an open-source printed circuit board by codemonkey76, from the codemonkey76/DIY-8-Bit-Computer repository on GitHub. It is a 2-layer board of 72.4 × 74.9 mm with 35 parts on 45 nets, routed with 654 tracks and 58 vias.
It is built around the HDSP-7403, 24C16 and 74LS139PC, with the 74LS273PC among its other parts. Its parts include 10 ICs, 4 capacitors, 3 resistors, 3 connectors and 1 switch. It belongs with the retro computing and games boards of this library.
Main components
4
HDSP-7403
DIP-10-40℃~+100℃ 0.3 1 12.7mm 2.2V 2.74mcd 7 Segment 7.62mm 80mW Common Cathode Yellow DIP-10 LED Segment Displays ROHSBroadcom LimitedLED Segment Displays
24C16
SOP-8SOP-8 EEPROM ROHSGAOGE MICROCHIPEEPROM
74LS139PC
PDIP-1622ns 74LS 8mA Decoder Single Supply PDIP-16 Signal Switches, Multiplexers, DecodersonsemiSignal Switches, Multiplexers, Decoders
74LS273PC
PDIP-201 15ns 27mA 27ns@5V,15pF 30MHz 5ns 74LS Series 8 D-Type Reset Rising Edge PDIP-20 Flip Flops ROHSonsemiFlip Flops
README
README.mdDIY-8-Bit-Computer
Based off schematics and design of breadboard computer by Ben Eater, available in kit form at: https://eater.net/8bit/kits
Parts
35| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | HDSP-7403 | Display_7Segment:HDSP-7401 | U7, U8, U9, U10 |
| 2 | 100nF | Capacitor_THT:C_Disc_D3.0mm_W1.6mm_P2.50mm | C3, C4 |
| 2 | 10nF | Capacitor_THT:C_Disc_D3.0mm_W1.6mm_P2.50mm | C1, C2 |
| 1 | +5V | TestPoint:TestPoint_Pad_1.5x1.5mm | TP9 |
| 1 | 100K | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R2 |
| 1 | 10K | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R1 |
| 1 | 1K | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R3 |
| 1 | 24C16 | Package_DIP:DIP-24_W7.62mm_Socket | U5 |
| 1 | 74LS08 | Package_DIP:DIP-14_W7.62mm_Socket | U1 |
| 1 | 74LS139 | Package_DIP:DIP-16_W7.62mm_Socket | U6 |
| 1 | 74LS273 | Package_DIP:DIP-20_W7.62mm_Socket | U3 |
| 1 | 74LS76 | Package_DIP:DIP-16_W7.62mm_Socket | U4 |
| 1 | BUS_0 | TestPoint:TestPoint_Pad_1.5x1.5mm | TP1 |
| 1 | BUS_1 | TestPoint:TestPoint_Pad_1.5x1.5mm | TP2 |
| 1 | BUS_2 | TestPoint:TestPoint_Pad_1.5x1.5mm | TP3 |
| 1 | BUS_3 | TestPoint:TestPoint_Pad_1.5x1.5mm | TP4 |
| 1 | BUS_4 | TestPoint:TestPoint_Pad_1.5x1.5mm | TP5 |
| 1 | BUS_5 | TestPoint:TestPoint_Pad_1.5x1.5mm | TP6 |
| 1 | BUS_6 | TestPoint:TestPoint_Pad_1.5x1.5mm | TP7 |
| 1 | BUS_7 | TestPoint:TestPoint_Pad_1.5x1.5mm | TP8 |
| 1 | Bus | Connector_JST:JST_PH_S8B-PH-K_1x08_P2.00mm_Horizontal | J1 |
| 1 | GND | TestPoint:TestPoint_Pad_1.5x1.5mm | TP10 |
| 1 | LM555 | Package_DIP:DIP-8_W7.62mm_Socket | U2 |
| 1 | Misc | Connector_JST:JST_PH_S3B-PH-K_1x03_P2.00mm_Horizontal | J3 |
| 1 | Negative | Button_Switch_THT:SW_PUSH_E-Switch_FS5700DP_DPDT | SW1 |
| 1 | Power | Connector_JST:JST_PH_S2B-PH-K_1x02_P2.00mm_Horizontal | J2 |
The 31 most common of 35 parts.
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Questions
How big is the Output register PCB?
It measures 72.4 × 74.9 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Output register use?
35 parts, built around the HDSP-7403, 24C16, 74LS139PC and 74LS273PC. 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 Output register KiCad files?
From the codemonkey76/DIY-8-Bit-Computer repository on GitHub, at the commit this page was made from: the board is Output Register/output-register.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Output register design in my own project?
Its repository states no licence, so its author keeps all rights: ask codemonkey76 before reusing the design.