When I saw this I knew I had to make it. I've wanted a better keyboard for my pocket chip, and had been speculating on designing one using bottom hinged keys like old HP calculators. Well "anthonysvatar" beat me to it.
This works quite well. much less fatiguing than mashing on the domes, and it looks quite professional.
I used .039" (1mm) music wire for the hinges. It fit quite well. .12mm layers and the holes in the faceplate and keys are fine.
I printed the faceplate in "natural" (clear) PLA to maintain the original theme. I had lifting on the upper corners (which messed up the fit there) and will have to reprint to get this right, but it is good enough to allow me to test it all.
The keys are colored by functional groups.
I have one of those rainbow selection of short lengths of PLA filament on order. I plan on printing a key set that reflects the "mad scientist Barbie" color scheme of the PocketCHIP. Definitely with a "gold" key for the fn shift key to reflect the HP heritage.
I strongly recommend this project to anyone out there with a PocketCHIP and access to a 3D printer.
Upper corners lifted on faceplate. This may need attention if you make one.