This is a very simple circuit that can be used to sense electromagnetic radiations. The circuit can even detect hidden wrings. A 1mH inductor is used for sensing the electric field. The electric field will induce a small voltage in the sensor inductor and this induced voltage is amplified by the opamp.
The headphone connect at the output of the opamp will give an audio indication of the electric field. For example, the electric field around a mains transformer can be heard as a 50 Hz hum. The POT R4 can be used to adjust the gain of the amplifier. By keeping the sensor inductor near to a telephone line, you can even hear the telephone conversations.
1 comments:
Click here for commentsr04-20-2023
Kiran Manchekar:
(1.) Hi, there. Have some questions about your ELECTROMAGNETIC FIELD SENSOR.
(2.) Would you list the specific components used, including the voltage, wattage, percentage, etc., as it might apply to each item?
(3.) Also, if you have time, could you show how this is put together on a breadboard?
(4.) Very new to electronics, so still needing as many visuals as possible.
(5.) Thanks.
(6.) Toodles!