Building Gauss Meter with Hall Effect or Mosfets - CoolMagnetMan

[prince7]

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;

 

[Bob S]

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