Electro18 posted a tutorial on how to make a portable digital optical tachometer using an Arduino Uno, an instructable here:
A tachometer is a device used to measure the RPM or Revolutions Per Minute of any rotating body. Tachometers can be contact based or non-contact ones. The non-contact or contact-less optical tachometers usually use laser or Infrared beam to monitor the rotation of any body. This is done by calculating time taken for one rotation.
FEATURES
- It can measure RPM over 20k
- Sensor range extends upto 7~8 cm
- Displays Maximum RPM
Check out the video after the break.
Thanks for a great instructable. I’ll be giving this a go at my next HackSpace meeting, I was wondering what to make before reading the tutorial.
Thanks :)