Metal Detector Circuit Diagram Using Transistor

This metal detector sensor project is easy to make and is an application of colpitts oscillator.

Metal detector circuit diagram using transistor.

The circuit is claimed to be tested but the difficult part in building this circuit is with winding the tapped coil. The above circuit diagram is of a low cost metal detector using a single bc548 transistor and an old radio. Here is a simple metal detector circuit using a ca3140 ic. The circuit can sense a soda can at a depth of six inches and metal pipes at an even greater distance.

1 x tda0161 proximity detector ic. Four transistor metal detector schematic. Surprising enough i found many metal detector circuits that work only with a help of a single transistor like the once shown below this circuit uses a single bc547 npn transistor. Circuit diagram working explanation.

1 x 2n2222a npn transistor. The following image shows the circuit diagram for the metal detector circuit. A simple metal detector circuit diagram and schematic using a single transistor and a radio. The unit is powered by two 9v batteries in series.

As a result the batteries should last a long time. 2 x 47nf capacitors ceramic capacitor code 473 1 x 1 kω resistor 1 4 watt 1 x 330 ω resistor 1 4 watt 1 x 100 ω resistor 1 4 watt 1 x 5 kω potentiometer.