APPLICATION OF ULTRASONIC AND PIR SENSOR

In an attempt to mitigate problems such as poor water allocation, inefficient use, and lack of adequate and integrated water management, Automatic Water level controller system is designed to monitor liquid level in an overhead tank or any liquid storage system with an automatic pumping system attached to it to refill the tank once the liquid gets to the lower threshold, while switching OFF the pump once the liquid gets to the higher threshold. You must have seen automatic door openers in shopping malls and other commercial buildings.It uses a motion-detecting sensor (PIR sensor) to open or close the door which detects the infrared energy emitted from human's body. When someone comes in front of the door, the infrared energy detected by the sensor changes and it triggers the sensor to open the door whenever someone approaches the door. The signal is further sent to arduino that controls the door.

GYROSCOPE

In fact, most devices with spinning wheels exemplify a gyroscope! Some air- and space-related uses include measuring orientation changes in planes and changing orientation in satellites and space vehicles. ... The gyroscopic motion (i.e. spinning) helps stabilize each of these objects