Google "sliding tubular variable capacitor"... _------------------------------------- Using: 1. Aluminium foil 2. 2 different PVC pipes or even cardboard pipe or any insulator with cylindrical shape. One pipe should be smaller in diameter than the other. Process: Then, stick the aluminium foil on top of both cylinders. Now insert one pipe into the other pipe. Just attach one wire each to the the foils.
how to make?
Google "sliding tubular variable capacitor"...
_-------------------------------------
Using:
1. Aluminium foil
2. 2 different PVC pipes or even cardboard pipe or any insulator with cylindrical shape.
One pipe should be smaller in diameter than the other.
Process:
Then, stick the aluminium foil on top of both cylinders. Now insert one pipe into the other pipe. Just attach one wire each to the the foils.