
Kevin Rye writes:
I came up with the idea that it would be cool to have a little button breakout board that I could quickly pop on to my breadboard when I suddenly found myself in need of some buttons. Instead of scrounging for buttons and resistors and taking up a whole ton of space, I could just simply connect a “mini keyboard” to the breadboard and be up and running in seconds.
Via the contact form.

What a coincidence – I’m currently making [with KiCAD] a small keypad. Uses low profile switches [Panasonic EVQ-PQHB55] and a TI TCA8418 encoder. PMOD compatible connector.
I should wrap it all up and post on github, I suppose.
If anyone wants to make one, the source files are on my website. Just follow the link above to my page and scroll to the bottom.