Circuit Diagram Of Mobile Detector. The signal contains electromagnetic rf radiation from the phone. Circuit diagram components required ic lm358 buzzer led red color transistor bc548 npn variable resistor 1mω resistor 100kω 220kω 1kω capacitor 1µf2 100µf generic gsm antenna or aerial antenna.
Below image is the construction of the circuit you will see that the radio is placed on the hand stick of the complete detector. Due to which v comes on pin 5 of ic lm3914. Mobile phone detector circuit detects only electromagnetic signals caused by active mobile phones and it cant located switched off mobiles.
Mobile phone sensor circuit detector project.
You can check our previous project based on lm358 ic. The circuit diagram is given below. As soon as an alcoholic exhales in front of the mq3 sensor v starts getting at the output pin 5 of the sensor. 2 solder capacitors c1 c2 c3 on the pcb board.