2015-11-22 (Su) Desktop Chording Keyboard

Wires for the keyboard were made by stripping the sheathing from one end of a short piece of Cat5e and crimping an RJ45 end to the other. Wire color coding was matched to the wrist mounted version to ensure compatibility. Since microswitches with flat spade terminals were used each of the key wires was given a receptacle capable of attaching to the switch. Ground wires were configured differently since a ground was required on each switch. Splitting flat spade terminals were used on the first switch of each keypad and each subsequent switch had two wires crimped in the receptacle except the last one.

Set of wires for desktop keyboard to RJ45 end
Close up of wire ends

Wire colors were matched to the switches and the keypads were attached to a programmed Arduino Micro to test all the switches. No problems were seen aside from a debounce issue which was fixed in the code. Switches in this model seem to require a longer debounce time compared to the mini tactile switches used previously.

Wired and functional keyboard

To do:
  • Build base
    • Construct or shape
    • Drill wiring holes
    • Stain
    • Finish
    • Attach keypads
  • Wire buttons to RJ45 connector
  • Attach to controller and test
  • Write instructions

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

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2015-08-16 (Su)