2019-02-04 (M) ModuKey

One of the biggest reasons for adding piezo elements to ModuKey was to add a clicking noise while typing. This was meant to replace clicky keyswitches, but it could be muted with a physical switch or a combination of existing keys. No matter how it was coded, there was not enough sound produced from a single power cycle to the piezo elements.

To create a consistent sound when keys were pressed, the loudest frequency, at least in my hearing range, was approximated and a sound mode was programmed which emitted a short tone whenever a key was pressed. The sound would stop whenever any key was released. A second mode was written which sustained the tone when a key was pressed and stopped the tone whenever a key was released. Both modes are demonstrated in the twenty-three-second video below.

ModuKey tone demonstration (0:23)

The default sound style was pseudo-random notes but this was switched to silent.

ModuKey on GitHub

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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