Hi everyone! This is my next project, Fidget Spinner RPM Counter or Arduino Tachometer with Hall-Effect Sensor.
- Fidget Spinner
- neodyimium magnet
- Arduino Uno
- LED + resistor 220 Ohm
- Hall-Effect Sensor – a3144
- resistor 10 k
- 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.
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.
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!
For more detail: Fidget Spinner RPM Counter