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![A Simple Metal Detector Circuit Using Beat Frequency Oscillator (BFO](https://i2.wp.com/freecircuitdiagram.com/wp-content/uploads/2008/11/metal_detector.gif)
A Simple Metal Detector Circuit Using Beat Frequency Oscillator (BFO
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![BFO_MULTIPLEXER - Basic_Circuit - Circuit Diagram - SeekIC.com](https://i2.wp.com/www.seekic.com/uploadfile/ic-circuit/20097720856759.gif)
BFO_MULTIPLEXER - Basic_Circuit - Circuit Diagram - SeekIC.com
![Electroluminescent Receiver - BFO/Amplifier](https://i2.wp.com/www.qsl.net/wn5y/elrbfopro.gif)
Electroluminescent Receiver - BFO/Amplifier
![455_kHz_BFO - Signal_Processing - Circuit Diagram - SeekIC.com](https://i2.wp.com/www.seekic.com/uploadfile/ic-circuit/s200971615044202.gif)
455_kHz_BFO - Signal_Processing - Circuit Diagram - SeekIC.com
![Simple Beat Frequency Oscillator (BFO) Metal Detector Circuit Explianed](https://4.bp.blogspot.com/-i9Ke_aIE2PQ/UblJ7HQtMdI/AAAAAAAAETY/6_BZ9E_E23o/s1600/bfo+metal+detector+circuit.png)
Simple Beat Frequency Oscillator (BFO) Metal Detector Circuit Explianed