ELECTROMAGNETIC FIELD (EMF) DETECTOR WITH LM358
Original Source: http://www.instructables.com/id/Electromagnetic-Field-EMF-Detector-With-LM358/
Parts List:
- 1x - EMF detector PCB (or you can use perfboard)
- 1x - 9V battery clip (6f22)
- 1x - stereo audio jack 3.5 mm
- 1x - LM358 - or any other pin compatibile dual opamp (TL072 works fine)
- 2x - 100mH radial inductor (may be labeled as 104J)
- 1x - LED (whatever color/parameters)
- 1x - potentiometer 500kΩ stereo linear
- 1x - 1N4148 or any other general purpose diode
- 3x - 1kΩ resistor
- 2x - 10kΩ resistor
- 2x - 100kΩ resistor
- 2x - 100µF electrolytic capacitor (any voltage rating)
- 4x - 2.2µF electrolytic capacitor (any voltage rating)
- 1x - SPDT switch if you want
- 1x - 8 pin socket if you want