0x31: IDC connector Pi Top Module




The Pi Top is becoming a popular platform for software development using the Raspberry Pi singleboard computer. However, interfacing hardware to the Pi Top can be challenging, since the hub does not conform with the RPi GPIO header. This module enables easy interfacing of external boards using a 40-way IDC cable connected to the 34-way Pi Top hub header.


This design breaks out the conventional 40-way RPi GPIO from the 34-way Pi Top hub connector and allows external hardware to be easily interfaced to the Pi Top using a standard 40-way IDC cable.

License terms
The 0x2C design is published under the Creative Commons Unported 3.0 License.  I do not profit from this design, neither should you. You are welcome to adapt, modify, and redistribute this design as long as the license terms are respected.

Physical size of PCB

40 mm (width) by 56 mm (height). Double-sided.

Rendering and photos

DipTrace 3D rendering, frontside with components


DipTrace 3D rendering, backside with components



0x31 module mounted in a Pi Top 2


0x31 module mounted in a Pi Top 2 connected to an external circuit board via IDC cable


Bill of materials

1 pcs. 40-way IDC connector (for connecting external boards with polarised IDC cables – recommended option)

1 pcs. 2×17, 90 degree, 2.00 mm pitch, male header

1 pcs. 5-way terminal block, 5.08 mm pitch


Estimated cost

An IDC connector,  a male angled header, and a 5-way terminal block should not cost more than EUR 5,-.



Schematic PDF: 0x31_schematic

DipTrace v. 3 schematic file: 0x31_schematic

DipTrace v. 3 PCB design file: 0x31_ratlined_public

Gerber files: 0x31_Gerber



Comments are closed.