How can I build inductor of any value at home ?? Any idea ?
Just take a wire and coil it up. I've used old transformers for inductors before. They work as long as you don't short the secondary wires.
Depends on the type of inductor you want. If you want one that you can show is working, take a nail, one that you can pick up with a magnet. To to the hardware store and buy a roll of doorbell wire. Unwrap a single conductor, and wrap a couple hundred turns around the nail. Connect this to a battery and you'll find that you've created an electormagnet, able to turn the needle on a compass, or to pick up small metal objects.
