Metal detector circuit with TDA0161


Posted on Mar 4, 2013

These metal detector circuit diagram is based on the TDA0161 monolithic integrated circuit , designed for metallic body detection by detecting the variations in high frequency Eddy current losses. For detecting metals , TDA0161 require an external LC tuned circuit . Output signal is determined by supply current changes. Independent of supply voltage, this current is high or low according to the presence or the absence of a close metallic object. This metal detector circuit use two LEDs , which offer an visual indication of presence or absence at a metals ,around the coil . To adjust the circuit you need to make sure there is no metal near the coil and then set the fine adjustment to a `Mid position`. After that you need to adjust the course adjustment to turn on the LED and , adjust the fine adjustment to turn off the LED.


Metal detector circuit with TDA0161
Click here to download the full size of the above Circuit.

This detector electronic circuit operates over a wide range input voltage of 4 -35 volts . If you want you can use other values for the Cx capacitor and for L1 inductor ( changing this value will affect the frequency oscillation and the detection range ) .




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Line-level preamplifier
IR Remote Control Transmitter ATtiny28
Dc-gain-controlled-video-amplifier
Audio 5 Band equalizer using IC BA3812L
Speakers
vu meter
0-50v 2a bench power supply
Tl5001 Pulse-width-modulation (pwm) Controller Coupled With A Tps2817 Mosfet Driver
Speech Board for SPO256
22kW and below hoist with Y- transfer power-saving circuit



Top