4 layers158.8 × 104.1 mm
2 layers55.2 × 23.5 mm
An 8-Bit Computer
- Size
- 55.2 × 23.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 9
- Nets
- 33
- Pads
- 62
- Tracks, vias
- 62, 0
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 4
- Created
- 23 Aug 2019
- Updated
- 2 Aug 2020
Overview
Pi I2C is an open-source printed circuit board by frenchie, from the frenchie/8-Bit-Computer repository on GitHub. It is a 2-layer board of 55.2 × 23.5 mm with 9 parts on 33 nets, routed with 62 tracks and 0 vias.
It is built around the BSS138. Its parts include 4 resistors, 3 connectors and 2 transistors.
Main components
1README
README.mdAn 8-bit Computer
My take on breadboard computer designs from Ben Eater (YouTube) and James Bates (YouTube).
Licensing
- The AVR Code for the 7-segment display driver, ALU & Clock are available to use under a MIT license
- The Microcode generator & associated tools are available to use under a MIT license
- All KiCAD design files are licensed Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
- The AVR In-System Programmer AVR includes Peter Fluery's i2c library and is licensed under the GPLv3
- The Included AVR Makefiles are Public Domain.
Parts
9| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 10k | Resistors_SMD:R_0805 | R3, R4 |
| 2 | BSS138 | TO_SOT_Packages_SMD:SOT-23 | Q1, Q2 |
| 2 | R | Resistors_SMD:R_0805 | R1, R2 |
| 1 | CONN_01X40 | Pin_Headers:Pin_Header_Straight_2x20 | P1 |
| 1 | I2C0 3V3 | Pin_Headers:Pin_Header_Straight_1x04 | P2 |
| 1 | I2C1 5V | Pin_Headers:Pin_Header_Straight_1x04 | P3 |
Questions
How big is the Pi I2C PCB?
It measures 55.2 × 23.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Pi I2C use?
9 parts, built around the BSS138. 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 Pi I2C KiCad files?
From the frenchie/8-Bit-Computer repository on GitHub, at the commit this page was made from: the board is KiCAD/Pi I2C 3.3V to 5V Level Shifter/Pi-I2C.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Pi I2C design in my own project?
Its repository states no licence, so its author keeps all rights: ask frenchie before reusing the design.
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