Alarm System using LDR and a Laser pointer
This alarm system employs LDR and laser technology to sound an alarm whenever the laser is not focused on the LDR sensor. The system is made up of the following parts:
1. Using an Arduino uno as a microprocessor
2. A light sensor (LDR) to detect the intensity of light
3. A buzzer that emits a sound to warn of a break-in.
4. An LED that flashes if an intruder is detected.
5. A laser pointer primarily directed at the light sensor
6. Connecting jumper wires, resistors, and a breadboard.