This is a simple and cheap home security system that costs only $ 15, to ward off nosy siblings and burglars alike. It comprises of a laser used as a ‘tripwire’ and a photosensor to detect whether this laser beam is blocked or not. If it is blocked an intruder, an ‘alarm’ will sound off using the piezo buzzer. The alarm I chose is the beautiful sounds of Pachelbel’s Canon in D major.
I was inspired to make this from spy movies with high-end home laser security systems where the protagonists sprays aerosol and navigate around a complex laser setup.
Make a robot friend with Adafruit’s CRICKIT – A Creative Robotics & Interactive Construction Kit. It’s an add-on to our popular Circuit Playground Express, FEATHER and other platforms to make and program robots with CircuitPython, MakeCode, and Arduino. Start controlling motors, servos, solenoids. You also get signal pins, capacitive touch sensors, a NeoPixel driver and amplified speaker output. It complements & extends your boards so you can still use all the goodies on the microcontroller, now you have a robotics playground as well.
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