Hello everyone I want to show you my last project, a Credit Card Sized Metal Detector.
This is a Pocket and flat version of the original instructable:
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Step 1: Previous Versions
I was happy with a previous version that I build, it was working very well, but the huge coil was giving it a Ghostbuster look. so I started wondering how to shrink it.
First I tried with a smaller coil, it worked better and was more compact, but I was still not happy.
So I went for the flat version and the coil was the biggest challenge.
I have tried several configurations, at the end I recycled a coil from a phone splitter.
Step 2: Components
- Arduino nano
- lipo battery
- Voltage up-converter (any)
- 10nF ceramic capacitor
- 1k resistor
- 330-ohm resistor
- Support (in my case credit card)
- Coil (highest inductance as possible, check with tester on 200-ohm)
- Glue (epoxy)
- Cables (from broken LAN cable for added rigidity)
Step 3: The Code and Circuit
As I said this project is a modification of the following original instructable:
Step 4: Final Version
As you can see, it is very fast and with good sensitivity.
Participated in the
Pocket Sized Contest