Busext
About the Busext PCB
Busext is an open source PCB design by Noah1989, published on GitHub under the MIT license. It is a 2-layer board measuring 160 × 100 mm, with 13 components from 7 distinct parts.
Other key parts include the 74HC244 and 74HC245. By type, the board carries 5 capacitors, 4 ICs, 2 connectors, 1 diode and 1 resistor.
From the project
An 8-bit microcomputer for the 21st century
- ... independent: - contains all the tools required to design another version of itself - does not require high soldering skills, uses through-hole parts only - uses only "evergreen" parts that have been in production for decades and are still made today
- ... aproachable: - simple through reduction - NO hidden complexity behind brittle abstractions - open source and self-documenting
Main components on the Busext
Busext bill of materials (BOM)
13 components, 7 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 3 | 74HC244 | DIP-20_W7.62mm_Socket_LongPads | U1, U2, U3 |
| 1 | 74HC245 | DIP-20_W7.62mm_Socket_LongPads | U4 |
| 2 | C96ABC | DIN41612_C_3x32_Male_Horizontal_THT | J1, J2 |
| 1 | BAT46 | D_DO-35_SOD27_P7.62mm_Horizontal | D1 |
| 4 | 100nF | C_Rect_L7.2mm_W2.5mm_P5.00mm_FKS2_FKP2_MKS2_MKP2 | C1, C2, C3, C4 |
| 1 | CP | CP_Radial_D5.0mm_P2.00mm | C5 |
| 1 | 10k | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1 |
Busext design files
The KiCad project lives in the Noah1989/loopmicro repository on GitHub; these links point at the commit this page was built from.
Busext: common questions
How big is the Busext PCB?
The Busext measures 160 × 100 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Busext?
13 components, from 7 distinct parts. The full bill of materials is listed on this page.
Where can I download the Busext design files?
From the Noah1989/loopmicro repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Busext design in my own project?
Yes, under the terms of its MIT license, which Noah1989 chose for the repository.
