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Touchwheels

Some capacitive sense rotary touchwheels.

These work by using only three capactive touch pads in a specific interleaved geometry and measuring the relative ratio of analog capacitive touch values between the pads to compute a distance along the slider.

Touchwheels made so far:

Demos:

There are several examples on how to use the touchwheel:

What's in Tindie touchwheel0 kit:

The touchwheel0 kit on Tindie comes with:

It makes a pretty good "first SMD soldering" exercise as the 0805 resistors are relatively big and not very heat sensitive.

Demo videos:

Useful links: