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Picture of Stand alone video surveillance system with Raspberry Pi

This tutorial describes how to build a stand alone video surveillance system based on Raspberry Pi. We will use a Raspberry Pi Camera that continuousl.

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How LED's work - A light-emitting diode (LED) is a two-lead semiconductor light source. It is a pn-junction diode, which emits light when When a suitable voltage is applied to the leads, electrons are able to recombine with electron holes wi