Simple BFO Metal Detector

Posted on Sep 5, 2012

A Very Simple `Beat Frequency Oscillator` type of Metal Detector. These are about the Simplest of all Metal Detector types, But still quite useful for many Detecting applications. And although this one is particularly simple, I find it works very well.

Simple BFO Metal Detector
Click here to download the full size of the above Circuit.

If there is Enough Interest in this Project, I will create a PCB for it and Elaborate on the coil Construction. But for now, Only the Schematic is Presented here. L1 is a Standard RF Choke. My choke was made by "Delivan", and I can supply th

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