Model No. 221: This project is designed as a security system based on photo sensing arrangement. It uses a 14- stage ripple carry binary counter to sense the light intensity through LDR. The output drives a buzzer and a relay for necessary action. This concept is very useful to deter burglars from banks, malls, jewellery stores and also in homes.
For more information about this project, kindly visit http://www.edgefxkits.com/electronic-eye-controlled-security-system
