Coil Coupled Metal Detector


Posted on Jan 25, 2013

A Coil Coupled Operation Metal Detector made from readily obtainable components and using an ordinary medium receiver as a detector. The metal detector shown here may well represent a new genre. At any rate, after some exposure, it is regarded as such by those who have seen it. It is based on a standard transformer coupled oscillator (TCO) - hence the name Coil Coupled Operation (CCO) Metal Detector. Although requiring a BFO (in this case provided by a Medium Wave radio), it differs from a typical BFO detector in that its performance far outstrips that of BFO. Also, unlike BFO, it is dependent on the balance of two coils to boost sensitivity.


Coil Coupled Metal Detector
Click here to download the full size of the above Circuit.

It also differs from IB, in that its Rx section is an active, rather than passive, component of the oscillator. Further, unlike IB, the design does not require critical placement of the coils. As with both BFO and IB, the design provides discrimination. Experiments with different embodiments of the idea have shown that it has the potential to match the best of IB. Happy hunting!




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Sound-level-meter
beeper circuit
Mini LOGGER V1.0 Block Diagram
dimmer circuit puzzle
14-20dB gain simple active antenna circuit diagram
Flyback Transformer Driver
DIY TCI + CDI Trigger
MAGNETOSTRICTION TV REMOTE CONTROL
Voltage-controlled voltage source second order band-pass filter circuit
Using TX05C new infrared burglar alarm circuit diagram



Top