Minimal metal detector

Posted 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
Click here to download the full size of the above Circuit.

The transistor is the MPS5172 or use a similar.

Leave Comment

characters left:

New Circuits



Popular Circuits

IR Link
30 LED audio frequency analyzer
High-frequency crystal oscillator
Simple Dc/Ac Inverter Circuit
Schematic diagram of a USB player Schematic Diagram
applied robotics
motion detector schematics
Automatic Mains Disconnect
difference between half full bridge plasma speaker 2
Power Supply
Intro to Intan Amplifier Chips
MS1/Extra Ignition Hardware Manual
ld168 audio control circuit diagram of a voltage-controlled flash decoration
Direct Box (instant music recording instrument for Musicians)