Abstract
In this project, we are going to make a motion detection security alarm using Arduino uno. It can detect the motion of an intruder with help of a PIR Sensor. It is based on infrared motion sensing that is every body emits heat energy in the form of infrared rays which are invisible to human naked eye but can be detected using elecronic motion sensor. The main objective is that it focuses on detection of motion without any external touch. The applications are as a automatic door bell circuit,in defense applications and other electronic devices.The passive infrared sensor detects the IR radiations emitted from humans within its range and it sends the signal to arduino uno then the led glows amd then it triggers buzzer, hence motion is detected.
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