At its core, the system offers automatic check-in/check-out detection, real-time timestamping using an RTC module ... powering the Arduino, or in my case, we use 2S Lithium-ion battery connecting to ...

A laser-based intrusion detection system built using Arduino. It triggers a buzzer and sends an SMS alert when the laser beam is interrupted. Developed for the Digital Logic Design Lab at FAST NUCES. ...