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 |
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+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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