Building Gauss Meter with Hall Effect or Mosfets - CoolMagnetMan

  • Context: Undergrad 
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SUMMARY

The discussion focuses on building a gauss meter for measuring magnetic fields, specifically using Hall effect transistors. Due to the unavailability of these transistors in Egypt, the user seeks alternative devices, such as MOSFETs. An alternative method mentioned involves using basic components like wire, an operational amplifier (op-amp), a resistor, a capacitor, and a voltmeter, leveraging Faraday's Law for measurement. This approach is viable for uniform magnetic fields within a specified volume.

PREREQUISITES
  • Understanding of Hall effect transistors and their applications in magnetic field measurement.
  • Familiarity with MOSFETs and their potential use as alternatives in electronic circuits.
  • Basic knowledge of operational amplifiers (op-amps) and their role in signal processing.
  • Comprehension of Faraday's Law of electromagnetic induction and its mathematical representation.
NEXT STEPS
  • Research alternative magnetic field sensors, including fluxgate magnetometers.
  • Learn about the design and implementation of circuits using operational amplifiers for sensor applications.
  • Explore the principles of electromagnetic induction and its practical applications in measuring devices.
  • Investigate the specifications and characteristics of MOSFETs for potential use in magnetic field measurement circuits.
USEFUL FOR

This discussion is beneficial for electronics enthusiasts, hobbyists building measurement devices, and engineers involved in sensor technology and magnetic field applications.

prince7
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im working in a project requires a measuring of magnetic Fields
all i need right now is a device to build up a gauss meter i have found a one using a hall effect
transistor here in this link http://www.coolmagnetman.com/magmeter.htm
but these hall effect transistor isn't found in Egypt
so anyone can tell me ant other device can be used
like a certin transistor maybe Mosfets
thanks;
 
Physics news on Phys.org
There is an easy way to measure magnetic fields using only wire, an op-amp, a resistor, capacitor, and a voltmeter, if you have a big enough volume of uniform field (about a 5-cm cube). This because Faraday's Law may be written

∫V·dt = -∫B·dA

(So volts times seconds = Teslas times m2)

See my post # 27 in

https://www.physicsforums.com/showthread.php?t=70290&highlight=flip+coil&page=2

Bob S
 

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