Build a magnetic field detector with this simple oscillator circuit. This 2-channel project recovers a ferrite rod and coil from an old Medium Wave receiver to detect the Earth magnetic field and create a remarkable audible response....
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Detect electromagnetic fields from 50Hz to 100kHz with this sensitive circuit featuring an LF351 operational amplifier and 1mF choke. Build your own powerful EMF detector and explore paranormal activity or measure fields in your environment....
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