Alarm Circuits

5 Results

Laptop Security Alarm

Want to keep your laptop/notebook securely? Introduced here is the idea of a simple yet effective laptop/notebook antitheft alarm device with a security cable that fits in the USB port of the laptop/notebook. The security […]

Optical Smoke Alarm

Optical smoke alarms, also known as photo-electric smoke alarms, are particularly useful in bedrooms, lounges, hallways, and in other areas where we can otherwise expect false alarms from the common ionization smoke alarms. An optical […]