Day 19 Arduino Advent Calendar
First published at Tuesday, December 19 2017
Arduino Advent Calendar Day 19 - Laser Module!
Do not look into the Laser Module when it is powered on. Looking into lasers can cause permanent eye damage!
Today we're going to have a look at the laser module (for the purposes of build a laser trip wire)!
Remember lasers are dangerous and you should never look directly into a laser whilst it is powered.
A laser generates an intense beam of coherent (the photons are all moving in parallel) monochromatic light (the light is all the same wavelength).
The lasers we use, are a type of diode and when viewed really closely look similar to LEDs.
We can build a laser trip wire by pointing our laser at a light dependent resistor and measuring the change when an object cuts the beam.
Yup, enough talking about it let's go and build up the circuit over at guides.littlebird.com.au !
We're happy to help!
If you find you're getting stuck with today's guide, hit up our team of highly trained Arduino ninjas on this forum thread.