This simple circuit measures the strength of a radiated signal from a transmitter. It is commonly used by model airplane builders to check whether their transmitter are really transmitting the radio ...

It’s something [mircemk] demonstrates, with an Arduino-powered magnetic field strength meter that uses a UGN 3503U Hall effect device. The circuit is extremely simple, comprising the sensor ...

These days when electronic circuits can be found almost anywhere ... If you believe that these experts are right, the magnetic-field meter described will help you find sources of SMFs and determine ...