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In electronic security systems, a physical device or change/presence of any electronic signal/logic which causes trigger to electronic circuit to perform application specific operation. In electronic alarm systems the use of this trigger event done by such devices is to turn on the alarm or siren producing sound and/or perform a security ...
This produces a very compact and small device. In this device, in addition to the mechanical system, there are electronic circuits for control, acquisition and conditioning of the signal able to sense the environment. [9] MEMS accelerometer can be divided into two groups, piezoresistive and capacitive-based accelerometers.
Dual-loop is a method of electrical circuit termination used in electronic security applications, particularly modern intruder alarms. It is called 'dual-loop' because two circuits (alarm and anti-tamper) are combined into one using resistors. Its use became widespread in the early 21st century, replacing the basic closed-circuit system, mainly ...
Electronic sirens incorporate circuits such as oscillators, modulators, and amplifiers to synthesize a selected siren tone (wail, yelp, pierce/priority/phaser, hi-lo, scan, airhorn, manual, and a few more) which is played through external speakers. It is not unusual, especially in the case of modern fire engines, to see an emergency vehicle ...
When used as part of a security system, the electronics in the PIR typically control a small relay. This relay completes the circuit across a pair of electrical contacts connected to a detection input zone of the burglar alarm control panel. The system is usually designed such that if no motion is being detected, the relay contact is closed—a ...
A panic button alarm is a self-contained electronic device powered by an internal long-life battery, typically Waterproof and designed to be shock resistant and highly durable. In a medical emergency, the advantage over a simple cell phone is that the person in distress may not have the ability to dial the three digits for 911, and may not have ...