2018-05-03 (Th) ModuKey

Three different sized boards were assembled with ICs, keyswitches and a pullup resistor on the RESET pin. All three boards were assembled from the first batch of circuit boards so the next version will already have spots for pull-up resistors on the RESET pin as well as all the inputs.

RESET pins held high with IMT resistors

Links between the boards were an easy matter because of the header arrangement. Four short jumpers to each IO board were added at the right locations. This will be easier on the next generation of board which have the holes labeled. Leads from a trimmed resistor were bent into shape for the purpose.

Soldering four leads between boards

A wooden base was made for the keyboard. It was laser cut so it would match the exact alignment of the boards and it could be installed with ordinary wood screws. The fit was perfect the first time. It was made nine units wide so this may be an unusual size. It was the minimum size to make a functional typing keyboard for one hand.

PCBs installed on a wooden base

The rest of the posts for this project have been arranged by date.

First time here?

Completed projects from year 1
Completed projects from year 2
Completed projects from year 3
Completed projects from year 4
Completed projects from year 5

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