If you don't want to have a breakout PCB made you can use a 1/4 size PermaProto board, headers, and screw terminal blocks instead. This works great too, you just won't have the fancy silkscreen labels and extra per-button GND pins to work with, but you can daisy-chain your ground connections as shown in the Case Assembly section, so that shouldn't be a problem.
Parts Prep
Here's what you'll need:
- 1/4 Sized PermaProto board
- Female header pins cut into two 13-pin strips
- Male header pins (come with KB2040)
- 2 ea. 0.1" Pitch Terminal Block 10-pin
- 2 ea. 0.1" Pitch Terminal Block 3-pin
Solder Screw Terminal Blocks
Now, solder the 10- and 3-pin terminal blocks. Make sure to orient them so the wire entry positions face "out" toward the edges of the PCB, otherwise it'll be spectacularly difficult to insert wires!
Insert the KB2040 with the USB port facing out and you're ready to use it.
Page last edited March 04, 2026
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