Abstract
We created a rough prototype of the device on paper, in order to create the product rapidly and efficiently. Further, we researched about various sensors and microcontrollers to make it as affordable as possible. Understanding the working for a passive infrared sensor was a major part of building the circuit. The PIR sensor had a 3-pin connection at the side, one pin was the ground, another signal and the last one was power. we powered the PIR with the help of 5V battery and connect ground to ground; then connected the output to a digital pin. After attaching the PIR and testing it with the help of an LED, we attached the ISD1820, to play the required sound.
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