ECE 110/Equipment/Hall Effect Sensor

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Pins

• 1 (left): Supply voltage $$\E{V}{CC}}$$, typically 5 V
• 2 (middle): GND
• 3 (right): vout between 0 and $$\mathrm{V}_{\mathrm{CC}}$$

Operation

The voltage on the third pin will vary depending on the supply voltage and the magnetic flux density through the Hall effect sensor. If the magnetic flux density is 0 G (where G stands for gauss), the third pin will read

Assuming a 5 V external supply, pin 3's voltage will be between 0 and 5 V. A voltage of 0 V indicates the strong presence of a south pole while a voltage of 5 V indicates the strong presence of a north pole. An output of 2.5 V indicates no magnetic field. The sensitivity is 5 mV/G (where G stands for gauss)

• https://www.allegromicro.com/en/products/sense/linear-and-angular-position/linear-position-sensor-ics/a1324-5-6 A1324, A1325, A1326: Low Noise, Linear Hall Effect Sensor ICs with Analog Output ]