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 × 50.8 mm
Address register
codemonkey76/DIY-8-Bit-ComputerDIY 8-Bit Computer, based on the design by Ben Eater
- Size
- 72.4 × 50.8 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 39
- Nets
- 32
- Pads
- 104
- Tracks, vias
- 317, 31
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 25 Aug 2019
- Updated
- 25 Aug 2019
Overview
Address 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 × 50.8 mm with 39 parts on 32 nets, routed with 317 tracks and 31 vias.
It is built around the 74LS157PC, 74LS173SC and A1, with the A2 and A3 among its other parts. Its parts include 6 resistors, 6 diodes, 4 connectors, 2 ICs and 2 switches. It belongs with the retro computing and games boards of this library.
Main components
5
74LS157PC
PDIP-160℃~+70℃ 4.75V~5.25V Single Supply PDIP-16 Signal Switches, Multiplexers, Decoders ROHSTexas InstrumentsSignal Switches, Multiplexers, Decoders74LS173SC
CDIP-160℃~+70℃ 10ns 10ns 28mA 30MHz 4 4.75V~5.25V 40ns@5V,15pF 74LS Series Asynchronous D-Type Reset Rising Edge Tri-State CDIP-16 Flip FlopsTexas InstrumentsFlip Flops
A1
SOD-123FLDiodes - General PurposeWild GooseA2
SOD-123FL-55℃~+150℃ 1 Independent 1.1V@1A 100V 1A 30A 50uA SOD-123FL Diodes - General Purpose ROHSZhengxinDiodes - General PurposeA3
SOD-123FL-55℃~+150℃ 1 Independent 1.1V@1A 1A 200V 30A 50uA SOD-123FL Diodes - General Purpose ROHSZhengxinDiodes - General Purpose
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
39| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | 220R | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R1, R2, R3, R4, R5, R6 |
| 1 | +5V | TestPoint:TestPoint_Pad_1.5x1.5mm | TP14 |
| 1 | 100nF | Capacitor_THT:C_Disc_D3.0mm_W1.6mm_P2.50mm | C1 |
| 1 | 74LS157 | Package_DIP:DIP-16_W7.62mm_Socket | U2 |
| 1 | 74LS173 | Package_DIP:DIP-16_W7.62mm_Socket | U1 |
| 1 | A0 | LED_THT:LED_D5.0mm | D3 |
| 1 | A1 | LED_THT:LED_D5.0mm | D4 |
| 1 | A2 | LED_THT:LED_D5.0mm | D5 |
| 1 | A3 | LED_THT:LED_D5.0mm | D6 |
| 1 | AUTO | LED_THT:LED_D5.0mm | D1 |
| 1 | A_0 | TestPoint:TestPoint_Pad_1.5x1.5mm | TP10 |
| 1 | A_1 | TestPoint:TestPoint_Pad_1.5x1.5mm | TP11 |
| 1 | A_2 | TestPoint:TestPoint_Pad_1.5x1.5mm | TP12 |
| 1 | A_3 | TestPoint:TestPoint_Pad_1.5x1.5mm | TP13 |
| 1 | Address | Connector_JST:JST_PH_S4B-PH-K_1x04_P2.00mm_Horizontal | J4 |
| 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 | TP5 |
| 1 | BUS_3 | TestPoint:TestPoint_Pad_1.5x1.5mm | TP7 |
| 1 | Bus | Connector_JST:JST_PH_S4B-PH-K_1x04_P2.00mm_Horizontal | J2 |
| 1 | CLK | TestPoint:TestPoint_Pad_1.5x1.5mm | TP4 |
| 1 | CLR | TestPoint:TestPoint_Pad_1.5x1.5mm | TP6 |
| 1 | GND | TestPoint:TestPoint_Pad_1.5x1.5mm | TP9 |
| 1 | Misc | Connector_JST:JST_PH_S4B-PH-K_1x04_P2.00mm_Horizontal | J3 |
| 1 | PROG | LED_THT:LED_D5.0mm | D2 |
| 1 | PROG | TestPoint:TestPoint_Pad_1.5x1.5mm | TP8 |
| 1 | Power | Connector_JST:JST_PH_S2B-PH-K_1x02_P2.00mm_Horizontal | J1 |
| 1 | SW_DIP_x04 | Button_Switch_THT:SW_DIP_SPSTx04_Slide_9.78x12.34mm_W7.62mm_P2.54mm | SW1 |
| 1 | SW_DPDT_x2 | Button_Switch_THT:SW_PUSH_E-Switch_FS5700DP_DPDT | SW2 |
| 1 | ~MI~ | TestPoint:TestPoint_Pad_1.5x1.5mm | TP3 |
The 35 most common of 39 parts.
Questions
How big is the Address register PCB?
It measures 72.4 × 50.8 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Address register use?
39 parts, built around the 74LS157PC, 74LS173SC, A1 and A2. 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 Address register KiCad files?
From the codemonkey76/DIY-8-Bit-Computer repository on GitHub, at the commit this page was made from: the board is MAR/address-register.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Address register design in my own project?
Its repository states no licence, so its author keeps all rights: ask codemonkey76 before reusing the design.
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