A great educational tutorial on making your own laser tripwire with Raspberry Pi. via raspberry.org
In this resource you will make a laser tripwire, using a laser pointer and a Raspberry Pi.
What You Will Learn
By creating a laser tripwire with your Raspberry Pi, you will learn:
How to use GPIO pins
How to create a circuit on a breadboard
Controlling GPIO pins with Python code and GPIO Zero
How to use a capacitor to get readings from analogue sensors
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