This is a circuit comprising of two oscillators. One's frequency is adjustable by means of a preset pot, the other changes due to changes in the capacitance of the antenna, caused by, in this case, a hand. The two oscillators beat against each other when mixed, and this is amplified by my guitar amplifier, connected to the red and green crocodile leads.
Yes, I know prototyping boards are not ideal for this application, but are the best option at present.
Well, it could be used to detect all sorts of things which affect the capacitance of the antenna. It could detect a person, it could detect water and other similar things.
SciGuy16
P.S. "?"
SciGuy16 2 years ago
What would be an application of this circuit
Cygnus017 2 years ago