Here is todays’ images
The black PLA is electrically conductive 3D Printed filament and the yellow is regular insulating filament.
Not touching light off
…
Touching, light on
So lets try 2 capacitors. First a traditional parallel plate.
It worked but very low values even with larger resistors on the voltage divider. I maxed out at 100K ohm resistor so maybe it would work if I got into the M ohms.
Next a forked capacitive touch sensor design I saw on Thingiverse but I could not re-find it so I made my own.
This worked very well from a reading point of view. The voltage divider showed about ~1100 without touching the sensor and ~300 with touching the sensor. I did notice a bit of wobble with the numbers so I don’t think things are really stable, but it did work!
All in all a good day. I did make a spherical capacitor but the insulator was too thin so it did not work.
I am working on a Cr2025 double battery holder and then will try to string several components together.