Measuring electromagnetic fields

I have built a circuit using a hall effect device and 5V voltage regulator, with a digital voltmeter to measure the change in the electromagnetic field. The digital voltmeter measures from 8-30V. When I have the voltage regulator in the circuit, there is nothing registered on the voltmeter. What could be the cause? Does the voltage regulator decrease the voltage to a level that is unreadable by the voltmeter?

by karenl
September 02, 2018

Read the spec.

by mikerogerswsm
September 02, 2018

What Hall effect device and what is your circuit?

by mikerogerswsm
September 02, 2018

1 Answer

Answer by seantsheep

  1. Is the hall effect device a reverb device?

  2. What are you using to connect the components? E.g: Guitar cables, electrical wire, solder.

+1 vote
by seantsheep
September 02, 2018

Hall effect devices are a well known way of detecting a static magnetic field. A supply is connected across two terminals and the small voltage difference between the other two terminals is approximately proportional to the magnetic field across the device.

by mikerogerswsm
September 02, 2018

Modern three-pin sensors may have regulator and opamp built-in. In this case the supply goes into two pins and the third pin is the output.

by mikerogerswsm
September 02, 2018

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