I think the Theremin is the way to go. I've known this instrument for a long time but this is the first time I made the connection with my current project. Let's say my plate is the theremin, I want the switch (plate) to work like a dimmer on a lightbulb: brighten the light when the hands are...
Thank you for your reply Skogsgurra!
It is no problem that it also reacts to other body parts or animals, and also the weather is not a problem since it will be for indoor use only. A presence indicator is not a solution, I want to implement the ability to detect the presence in the object...
I am looking for a way to make a switch which is activated by moving your hand in the vicinity (<5cm) of a steel plate (dimensions +/- 500x40x0,5mm).
My initial idea is to generate a (magnetic?) field around this sheet and detect if there are any changes in this field. Since I have very little...
