With the EKI 2004 Metal Detector find the buried treasure in your backyard with this simple metal locator circuit.
Transmits a signal to an AM radio (not included) that varies depending on distance and type of metal found. 9V battery not included. Principles taught: communications, LC oscillator, transmitters. Components: 2 resistors, poten tiometer, 2 capacitors, coil, transistor, slide switch, battery snap