High Temperature Fire Alarm Circuit Using Transistors

The post narrates the making of a simple high temperature fire alarm circuit using transistors only, and not with conventional heat sensors. Though we don’t pay much heed to fire alarm usually, it is in fact a necessary factor that should be maintained as a de facto. Accident is unfortunate, but if you remain a […]

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Simple Laser Alarm Circuit

The article details an uncomplicated laser beam dependent security alarm circuit that could be set up in agricultural areas and fields for detecting just about all potential intrusions, sometimes by a human being or an animal and alarming this to the user, and guaranteeing a powerful defense to the vegetation against these kinds of intrusions […]

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Laser Operated Security Alarm Circuit

We all might have usually observed laser alarm system as an important part of security solution specifically for a location which ought to get hi-level security. Starting from a museum conserving priceless historical possession; to a safety bank vault; and even in thriller flicks where the protagonist is seen on and often tied in the […]

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Simple Door Security Alarm Circuit

This circuit produces a beep and/or lights up a LED if a person hits the door-handle from outside. The alarm system will signal until the circuit might be switched-off. The over-all circuit is encapsulated in a compact plastic-type or timber container and needs to be hanged-up to the door-handle using a thick cable link up […]

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Simplest Water Level Controller Circuit with Buzzer

This simple and inexpensive circuit sounds an alarm Ca whistle) when water level in a Container, such as an over- head water-tank, reaches a predetermined level. The basic circuit is an audio oscillator with positive feed- back. The output from Tl transistor is fed back to the base of T2 transistor via the mass of […]

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How to Build a Laptop Anti-theft Security Alarm Circuit

The publish clearly shows a clear-cut security alarm circuit which could be utilized with any specific involved object for example a laptop which ought to be guarded, when an intruder attempts to approach the unit or tends to make an make an effort to steal it the associated alarm is immediately brought up. The circuit […]

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How to Make a Power ON Alarm with Auto OFF Circuit

The submit talks about a basic monostable dependent power turn on alarm circuit which automatically switches OFF after an adjustable preset delay. The asked for power activate alarm circuit utilizing a delay OFF circuit might be observed in the presented diagram. It’s essentially developed around a regular IC 555 monostable multivibrator configuration. The procedures are […]

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How to Make a Office Call Bell Network Circuit with LED Monitor

The submit describes a call bell network system for office complexes which might be employed for contacting and tracking office member’s attendance and reply from the specific meant office chamber. The suggested office call bell network as required above might be summarized provided below: The central head office ought to be attached to each of […]

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How to Build a Heart Rate Monitor, Alarm Circuit

The publish explores a straightforward circuit which can be employed for supervising the essential heart rate of a patient (senior citizen), the circuit furthermore consists of an alarm for showing the condition. In the earlier article we picked up to create a heart rate sensor circuit with processor, which might be properly utilized in the […]

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How to Make a Refrigerator Door Open Alarm Circuit

This shown circuit alarm updates you after some time at any time your refrigerator door is left open. This circuit turns into easy to carry, simply because in the event the door is left as a result of carelessness might cause tremendous increase in the consumption and influence the lifespan of the fridge. Circuit procedure […]

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