Idea: Use a capacitive touch surface to wake from sleep

scottbez1 / smartknob

Haptic input knob with software-defined endstops and virtual detents

https://www.youtube.com/watch?v=ip641WmY4pA

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Idea: Use a capacitive touch surface to wake from sleep #89

Open hedelmasalaatti opened 2 years ago

hedelmasalaatti commented 2 years ago

Using a capacitive touch surface on the outside of the knob would allow for disabling the magnetic sensor/display to conserve energy in battery powered devices. This would also make UI options like letting go of the knob or tapping the knob to interact possible. Most of this could probably be done using the strain gauges but capacitive sensing allows for detection before the user even touches the knob, allowing the user to wake the display by hovering over the knob.

mrjonny2 commented 2 years ago

It is possible to do proximity based capacitive sensing so that the knob wakes up as you get within about 10cm. https://www.ti.com/tool/FDC2214PROXSEN-EVM?keyMatch=FDC2214PROXSEN-EVM