Description, this project is work on lesser light beam and this lesser beam constant receiving on lesser diode, when lesser beam breaks any reason then automatically buzzer on. This project is best for 10th 11th 12th physics school project and engineering students; this project is investigatory school and engineering project. These projects have main function lesser transmitter and receiver, this project have lesser light is light transmitter and lesser diode is a lesser receiver, this project work on 9volt battery so not need electrical supply. This project ready to use and it with all technical details provide by project report format. This project more explanation available in our YouTube channel “Santos the project maker” thank you for you visit our website www.Projectmaker.in
