GPIO expander board
About the GPIO expander board
GPIO expander board is an open source PCB design by Open-2-Photon-Microscope, published on GitHub under the CERN-OHL-1.2 license. It is a 2-layer board measuring 49 × 59.5 mm, with 12 components from 10 distinct parts.
By type, the board carries 9 connectors and 3 capacitors.
From the project
a controller system to operate motors and microscope XYZ stage
A manipulator device to operate microscope stage XYZ translations. This project was specifically designed for the OpenFlexure Delta Stage.
GPIO expander board bill of materials (BOM)
12 components, 10 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | Endstop C | JST_XH_S2B-XH-A_1x02_P2.50mm_Horizontal | J1 |
| 1 | Endstop B | JST_XH_S2B-XH-A_1x02_P2.50mm_Horizontal | J2 |
| 1 | Endstop A | JST_XH_S2B-XH-A_1x02_P2.50mm_Horizontal | J3 |
| 2 | Conn_01x16 | PinHeader_1x10_P2.54mm_Vertical | J4, J6 |
| 1 | pcf8575 IO expander | PinHeader_1x05_P2.54mm_Vertical | J5 |
| 1 | INT | PinHeader_1x02_P2.54mm_Vertical | J7 |
| 1 | CONN_01X02 LCD | JST_XH_B4B-XH-A_1x04_P2.50mm_Vertical | P1 |
| 1 | input | JST_XH_B4B-XH-A_1x04_P2.50mm_Vertical | P2 |
| 2 | 22NF 33nF | C_Disc_D6.0mm_W4.4mm_P5.00mm | C1, C2 |
| 1 | 33nF | C_Disc_D6.0mm_W4.4mm_P5.00mm | C3 |
GPIO expander board design files
The KiCad project lives in the Open-2-Photon-Microscope/3-axis-controller repository on GitHub; these links point at the commit this page was built from.
GPIO expander board: common questions
How big is the GPIO expander board?
The GPIO expander board measures 49 × 59.5 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the GPIO expander board?
12 components, from 10 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the GPIO expander board design files?
From the Open-2-Photon-Microscope/3-axis-controller repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the GPIO expander board design in my own project?
Yes, under the terms of its CERN-OHL-1.2 license, which Open-2-Photon-Microscope chose for the repository.
