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Make an Alarm System and Visitor Counter for your room! #piday #raspberrypi @Raspberry_Pi

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From instructables user ottojo:

You want to get notified when someone enters your room?

You want to know how many visitors you had?

You want a device that says “Goodbye” everytime someone leaves?

In this instructable i will explain how to do this using a Raspberry Pi and a photoelectric barrier unsing laser sensors.

Full instructable


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