Fidget Spinner RPM Counter

Hi everyone! This is my next project, Fidget Spinner RPM Counter or Arduino Tachometer with Hall-Effect Sensor.

1: Requirements
Parts Required:

Fidget Spinner
neodyimium magnet
Arduino Uno
LED + resistor 220 Ohm
Hall-Effect Sensor - a3144
resistor 10 k
Wires
Breadboard
LCD 1602
2: Hall-Effect Sensor
Using Hall-Effect Sensor we can measure the speed of rotation. I used Hall-Effect Sensor - a3144.


RPM (Revolutions per minute) – the number of revolutions per minute. Revolutions per minute – a unit of measurement of rotational speed: the number of complete rotations made by the body (fidget spinner, wheel etc.) around a fixed axis. Used to describe the speed of rotation of the mechanical components in the mechanisms and machines.

3: How does it work?
To measure the speed of rotation on the Fidget Spinner must be mounted a part of neodyimium magnet that affect the Hall sensor after each complete turn of the Spinner.


4: Indication
The presence of a magnetic field is indicated on the LED.


LCD 1602 indicates current RPM, maximum RPM and tachometr bar (from 0 up to 1260rpm). 1260 rpm is my personal record.


Also you can use Arduino IDE serial port.

5: Notes
I used a Hall-Effect Sensor A3144 and it worked well just connected to the pin 2 of Arduino Uno board. Also I tried to use a Hall-Effect Arduino module just like this one and it worked very bad.


I recommend not using this module bacause of false harmonics.

Thank you all! Please, write in comments about your Fidget Spinner RPMs!

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