Minimal metal detector  

Category:
Metal Detector Circuits
Added on
Nov 4, 2012
This circuit is on oscillator with LI being a 4` diameter coil of 35 turns of #26 magnet wire. Metal in proximity to LI will cause the oscillator to shift frequency. An AM transistor radio is used to detect the frequency shift.
Minimal metal detector - schematic

The transistor is the MPS5172 or use a similar.




Leave Comment

characters left:

.