GPIOExpansion
About the GPIOExpansion PCB
GPIOExpansion is an open source PCB design by ja1umi, published on GitHub under the MIT license. It is a 2-layer board measuring 155 × 114 mm, with 33 components from 10 distinct parts.
Other key parts include the 74HCT245, TBD62783A, GAL16V8, 74HCT574 and 74HCT138. By type, the board carries 15 capacitors, 14 ICs and 4 connectors.
From the project
Various design materials for building my 8-bit-microprocessor-based single board computer(s)
MUTIF09 (or shortly MUTIF) project is my hobby project for developent of tiny homebrew computers and their add-on/expansion boards (e.g. Arithmetic coprocessor and I/O expansion board) simple enough for building and maintenance, focusing on around 1980s-era microprocessors (e.g. Motorola's MC6809, Harris' HD-6120) just for fun.
Updates are available when they are released.
Main components on the GPIOExpansion
GPIOExpansion bill of materials (BOM)
33 components, 10 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 4 | 74HCT245 | DIP-20_W7.62mm | U1, U2, U3, U4 |
| 4 | TBD62783A | DIP-18_W7.62mm | U5, U7, U10, U12 |
| 1 | GAL16V8 | DIP-20_W7.62mm_Socket | U6 |
| 4 | 74HCT574 | DIP-20_W7.62mm_Socket | U8, U11, U13, U14 |
| 1 | 74HCT138 | DIP-16_W7.62mm | U9 |
| 1 | Conn_01x02 | Pin_Header_Straight_1x02_Pitch2.54mm | J1 |
| 2 | HEADER_02x20 | Pin_Header_Angled_2x20_Pitch2.54mm | J6, J11 |
| 1 | HEADER 02x20 | Pin_Header_Straight_2x20_Pitch2.54mm | J7 |
| 14 | 0.1u | C_Disc_D5.0mm_W2.5mm_P5.00mm | C1, C2, C3, C4, C5, C6, C7, C8 +6 |
| 1 | 10u | CP_Radial_D5.0mm_P2.50mm | C15 |
GPIOExpansion design files
The KiCad project lives in the ja1umi/MUTIF09Project repository on GitHub; these links point at the commit this page was built from.
GPIOExpansion: common questions
How big is the GPIOExpansion PCB?
The GPIOExpansion measures 155 × 114 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the GPIOExpansion?
33 components, from 10 distinct parts. The full bill of materials is listed on this page.
Where can I download the GPIOExpansion design files?
From the ja1umi/MUTIF09Project repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the GPIOExpansion design in my own project?
Yes, under the terms of its MIT license, which ja1umi chose for the repository.
