A Simple Magnetic Probe
Created 03/04/05
The following is a simple gauss meter which utilises a Hall Effect IC. The output can be read on a DVM or an oscilloscope. Positive voltages indicate a NORTH Pole and Negative voltages indicate a SOUTH Pole. If correctly calibrated, the circuit can indicate correct field strength also. However in order to minimise space i have not used a split voltage supply as shown in the circuit diagram, I have used a 9v battery with 5v regulator. The output voltage is then set to 2v, a voltage higher than 2v then indicates one pole and if the voltage drops below 2v the other pole is indicated.
FLUKE 123 METER IN DC VOLTAGE TREND PLOT RECORDER MODE (SHOWING AVERAGE VOLTAGE)
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