Auto On & Off Lights by using PIR sensor and Ultrasonic sensor

[@durgaprasad-tk1cd]

Super keep it up

[@Lord5oth]

why do you need the arduino ? , you can just use a transistor or a mosfet with the PIR sensor

[@MKinventionsMadhanChiruguri]

Yes we can, but along with PIR sensor i am using ultrasonic sensor for object detection with in the range and using the timers to turn off the relay after few seconds if no object or motion is detected.