Fuse Monitor / Alarms
#fuse monitor
#alarm circuit
#safety
#electrical protection
#fault detection
#alert system
#circuit monitoring
#overcurrent protection
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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...
Single Zone AlarmCircuit - Project
The circuit includes automatic entry and exit delays, a timed bell cut-off, and a system reset feature. It accommodates both normally open and normally closed switches, making it compatible with common input devices such as pressure mats, magnetic reed contacts,...
House Alarm Loop
This circuit features open and closed loop contacts (switches 1, 2, 3) that activate the alarm, which remains activated for 5 to 10 minutes. The triggering delay for entrance and exit is set to 27 seconds. Additionally, this simple alarm...
High-Output Pulsed-Tone/Light-Activated Alarm Circuit
This circuit is capable of generating up to 1 W of audio power to drive a speaker or horn. When the CDS cell is exposed to light, its resistance decreases, activating NOR gate (a). This activation causes gates (a) and...
Night Safety Light For Autos
This circuit activates the brake lights of a parked car when headlights from an approaching vehicle are detected, alerting the driver of the oncoming vehicle about the stationary car. LDR4 serves as the sensor, while LDR1 deactivates the circuit by...
House Alarm Loop
This circuit features open and closed loop contacts (switches 1, 2, 3) that activate the alarm, which remains activated for 5 to 10 minutes. The triggering delay for entrance and exit is set to 27 seconds. Additionally, this simple alarm...
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...
Simple Fuse Monitor Indicators
This is a circuit diagram for a fuse monitor circuit indicator. This very simple circuit utilizes only two components: a single resistor and an LED. This circuit provides a visual indication when the fuse has blown. LED1 typically remains off,...
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...