DIY Analog Hall Effect Tachometer with Arduino Uno | RPM Display on I2C LCD

DIY Analog Hall Effect Tachometer with Arduino Uno | RPM Display on I2C LCD

In this video, I walk you through my homemade digital tachometer project using an analog Hall effect sensor and magnets mounted to a rotating shaft. This simple yet effective setup allows you to measure RPM accurately using an Arduino Uno.

Project Features:

Analog Hall sensor on A0 with LED indicator for visual feedback

2 magnets mounted to the shaft

2x16 I2C LCD shows real-time RPM (calculated every second)

RPM logic uses analog thresholds to detect magnetic field strength changes

Designed to work reliably even with noisy analog input signals

You'll see how the code handles pulse counting and debounce logic, and how RPM is calculated based on magnet count and timing.
I also added a visual LED indicator connected to the sensor output so you can see when a magnet passes by.

This is a great project for anyone learning about sensors, Arduino timing, and RPM measurement!

🔧 Components Used:

Arduino Uno

Analog Hall Effect Sensor

2x16 I2C LCD

2x Magnets

LED + Resistor

Rotating Shaft (e.g., toy fan or motor)

📜 Code is included in the video description.

Let me know what you think, and subscribe for more electronics experiments and Arduino tutorials!

#Arduino #Tachometer #HallEffect #RPMsensor #ElectronicsProject #DIYElectronics #UncleDuncansShack