Motion sensor alarms are readily available in the market, but these are expensive. Here is a simple and inexpensive Arduino based motion sensor alarm with voice alert. It can be used for security purposes. Typically, for outdoor monitoring, motion sensor alarm consists of a PIR (passive infrared) sensor that detects the movement of human beings […]
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Credit- EFY. Published by Department of EEE, ADBU: tinyurl.com/eee-adbu
