Metal Detector Wiring Diagrams. Metal detector coil operates at a frequency of 3 khz. The capacitor between pin2 and pin1 should not be changed as it is need to generate audible frequencies.
Metal detector circuit diagram parts list circuit diagram this simple circuit consists of the following parts. The capacitor between pin2 and pin1 should not be changed as it is need to generate audible frequencies. The thickness of the wire used for metal detector coils is 03mm but the writer is using 07mm.
Schematic diagram of beat frequency metal described in the text.
If there are any questions or comments about the manual please call eriez at 814 835 6000 for model 1235 metal detector assistance. This is the circuit diagram of a low cost metal detector using a single transistor circuit and an old pocket radiothis is nothing but a colpitts oscillator working in the medium frequency and a radio tuned to the same frequency bandfirst the radio and the circuit are placed closethen the radio is tuned so that there is no sound from radioin this condition the radio and the circuit will be in. The opera tion of the circuit is based on superheterodyning principle which is commonly used in superhet receivers. Components required 1 x tda0161 proximity detector ic 2 x 47nf capacitors ceramic capacitor code 473 1 x 1 kω resistor 14 watt 1 x 330 ω resistor 14 watt 1 x 100 ω resistor 14 watt 1 x 5 kω potentiometer 1 x 2n2222a npn transistor.