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# I already built a metal detector by using 555 timer IC. My problem is 10mh inductor?

Can you give me a details of 10mh inductor?

1. The number of wires?

2. The number of turns?

3. The coil diameter?

4. The coil length?

Thank you. I am hoping for your sonnest reply.

## Comments

Best Answer 8 years ago

Air cored, 25mm long, 25mm diameter, 800 turns.

8 years ago

You need to do some pretty heavy math, or use a wizard calculator:

http://www.diyaudioandvideo.com/Calculator/Inductor/

I searched for 'inductor calculator' and came up with that; it will figure out exactly what you need - substitute the numbers you know to find out what you need to know.