Bus
About the Bus PCB
Bus is an open source PCB design by Robert-Riordan-UCD, published on GitHub under the CERN-OHL-P-2.0 license. It is a 4-layer board measuring 62.2 × 274.1 mm, with 50 components from 13 distinct parts.
By type, the board carries 24 connectors, 18 resistors and 8 diodes.
It belongs with the dev boards & breakouts designs in this gallery.
From the project
PCB version of Ben Eaters 8-bit breadboard computer
This is my version of Ben Eaters 8-bit breadboard SAP-1 CPU, converted to a PCB. I have made some minor changes as I could not find all of the components as listed in Ben's part list.
1. RAM IC's have been replaced with ATMega328-PU's. This should allow me to have persistant programs between power cycles.
CERN Open Hardware Licence Version 2 - Permissive
Bus bill of materials (BOM)
50 components, 13 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | Conn_01x05_Pin | PinHeader_1x05_P2.54mm_Vertical | J1, J11 |
| 8 | Conn_01x10_Pin | PinHeader_1x10_P2.54mm_Vertical | J2, J4, J6, J8, J10, J17, J19, J21 |
| 4 | Conn_01x04_Pin | PinHeader_1x04_P2.54mm_Vertical | J3, J5, J7, J22 |
| 2 | Conn_01x07_Pin | PinHeader_1x07_P2.54mm_Vertical | J9, J12 |
| 2 | Conn_01x08_Pin | PinHeader_1x08_P2.54mm_Vertical | J13, J14 |
| 1 | Conn_01x06_Pin | PinHeader_1x06_P2.54mm_Vertical | J15 |
| 3 | Conn_01x03_Pin | PinHeader_1x03_P2.54mm_Vertical | J16, J18, J20 |
| 1 | USB_C_Receptacle_PowerOnly_6P | USB_C_Receptacle_GCT_USB4085 | J23 |
| 1 | Conn_02x03_Counter_Clockwise | PinHeader_2x03_P2.54mm_Vertical | J24 |
| 8 | LED | LED_D5.0mm | D1, D2, D3, D4, D5, D6, D7, D8 |
| 8 | 10k | CF_series_Resistors_THT | R1, R2, R3, R4, R5, R6, R7, R8 |
| 8 | 220 | CF_series_Resistors_THT | R9, R10, R11, R12, R13, R14, R15, R16 |
| 2 | 5.1k | CF_series_Resistors_THT | R17, R18 |
Bus design files
The KiCad project lives in the Robert-Riordan-UCD/8_Bit_CPU_PCB repository on GitHub; these links point at the commit this page was built from.
- LayoutBus/bus.kicad_pcb
- SchematicBus/bus.kicad_sch
Bus: common questions
How big is the Bus PCB?
The Bus measures 62.2 × 274.1 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Bus?
50 components, from 13 distinct parts. The full bill of materials is listed on this page.
Where can I download the Bus design files?
From the Robert-Riordan-UCD/8_Bit_CPU_PCB repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Bus design in my own project?
Yes, under the terms of its CERN-OHL-P-2.0 license, which Robert-Riordan-UCD chose for the repository.
More boards in 8_Bit_CPU_PCB
Control
144.8 × 73.9 mm64 parts2LCERN-OHL-P-2.00
AVR/ArduinoRAM
133 × 58.5 mm57 parts2LCERN-OHL-P-2.00
ALU
100.4 × 56.8 mm33 parts2LCERN-OHL-P-2.00
ClockModule
81.5 × 52.5 mm30 parts2LCERN-OHL-P-2.00
Registers
89.8 × 50.6 mm27 parts2LCERN-OHL-P-2.00
MemoryAccessRegister
84.3 × 39.3 mm22 parts2LCERN-OHL-P-2.00
Output
109.7 × 49.5 mm15 parts2LCERN-OHL-P-2.00
ProgramCounter
58.6 × 38 mm13 parts2LCERN-OHL-P-2.00
Similar boards
88 Pin Vag Breakout
rusefi
142 × 58 mm91 parts2LGPL-3.01.2k
134pin 7-967288-1
139.7 × 73.7 mm38 parts2LGPL-3.01.2k
Breakout 60pin EEC-IV
139.7 × 62.2 mm15 parts2LGPL-3.01.2k
Breakout 112pin Connector
174 × 58 mm39 parts2LGPL-3.01.2k
Eecv breakout
140.8 × 53.7 mm9 parts4LGPL-3.01.2k
Rj45 breakout
rene-dev
15.2 × 53.8 mm3 parts2LGPL-3.0979