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![A fun and Simple Arduino Beginner Tutorial: Laser Alarm Security [external source] - Education and Teaching - Arduino Forum](https://europe1.discourse-cdn.com/arduino/original/4X/2/1/f/21fcfcd4ea5eff333fdc84b600a49dfa10e01338.jpeg "A fun and Simple Arduino Beginner Tutorial: Laser Alarm Security [external source] - Education and Teaching - Arduino Forum")
A fun and Simple Arduino Beginner Tutorial: Laser Alarm Security [external source] - Education and Teaching - Arduino Forum
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