i want detail concept of paddle controlled door opening system

A system of automatic opening and closing of the door by detecting any movement of the body near the door. This is achieved with the aid of a PIR (infrared passive) sensor. A living body generally emits infrared energy which is detected by the PIR sensor from a considerable distance. This detection signal is fed to a micro-controller to operate a gate motor through the IC motor controller.When a body approaches within the operating range of the sensor, it sends a logic command to open the door. The door closes automatically with a fixed time delay. If there is no additional movement within the operating range of the PIR. Interrupt signals are used through the limit switches to avoid the locked rotor condition of the motor.

In addition, this project can improve the interconnection of a counting arrangement to maintain a record of entry and exit of people in a particular place. This can be achieved by interconnecting the system with an EEPROM (non-volatile memory) to avoid loss of stored data even if the power fails.