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Hall Sensor Tachometer

This demo uses a Hall Effect Sensor and an interrupt to measure the RPM of a gearmotor. The motor speed and direction are controlled with an H-bridge and potentiometer, and the RPM is shown on a 4-digit LED display.

Parts and Code

  • Arduino Uno, Breadboard, Wires

  • ​NorthPada Power Supply 9V 2A Charger AC Adapter for Arduino UNO R3

  • HiLetgo Hall Effect Magnetic Sensor Module 3144E A3144

  • 12V GearMotor

  • L293D Quadruple Half-H Driver

  • 10K Ohm Knurled Shaft Linear Rotary Taper Potentiometer with Cap

  • HiLetgo 0.36" 4-Digit Tube LED Segment Display Module

  • Magnets

Wiring Schematic

Hall Sensor Tachometer.png

Demos created by A. Torp, D. Zhu, and S. Marra

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