Fuse Monitor / Alarm circuit | Next Electronics

Each zone uses a normally closed contact. These can be micro switches or standard alarm contacts (usually reed switches). Zone 1 is a timed zone which must be used as the entry and exit point of the building. Zones 2...

Security Monitor

This circuit can be utilized in a garden setting to detect unusual sounds or wildlife noises. It can also monitor sounds around a car parked in a remote location. The cable used for the setup can either be visible or...

Elderly lost alarm circuit

The circuit utilizes an RMIB multivibrator component that operates at a maximum distance. When the distance exceeds a specific threshold, the output pin of the receiver goes low, effectively stopping the oscillation. The NE555 multivibrator, which is part of the...

5 Zone Alarm Circuit

Each zone uses a normally closed contact. These can be micro switches or standard alarm contacts (usually reed switches). Zone 1 is a timed zone which must be used as the entry and exit point of the building. Zones 2...

Simple 6-Input Alarm

This simple alarm circuit was designed for use in a combined garage and rumpus room. It can be assembled on Veroboard and uses just one IC plus a handful of additional components. The alarm circuit is based on a single integrated...

electronic circuit breaker

A circuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by overload or short circuit. Its basic function is to detect a fault condition and, by interrupting continuity, immediately discontinue electrical flow....

electronic hotel door vulnerability using stealth lock circuit

The term "pentester" refers to a penetration tester, individuals who assess security vulnerabilities. Many high-end hotels globally depend on keycard locks for securing hotel rooms. However, recent incidents of theft have shown that these locks may not be as secure...

Security alarm

This alarm features both open-loop and closed-loop detection systems along with an automatic alarm shutoff mechanism. It provides a 15-second delay for exit and entrance. Additionally, the alarm activation time can be adjusted from 1 to 15 minutes. The alarm system...

Induction high pressure alarm circuit

It utilizes the KD153 type "ding-dong" music integrated circuit (IC) to produce a "ding-dong" sound alarm. The reference number is 221611, and it is related to a refrigerator door alarm circuit. The KD153 integrated circuit is designed specifically for generating melodic...