Laser Light Security System

During our 1st semester me & my group had purchased some Light Detecting Resistors for a project, at the moment I was in 4th semester & I found that stuff, wanted an application for them, thought of an idea & designed this laser lights security system 🙂 A laser continuously falls on the photo diode & as soon as a barrier is noticed between laser light & my LDR, the arduino comes to know & sounds the alarm to notify about any possible thief or so 🙂

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