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 […]

Read More »

How to Make a Power Interruption Alarm Circuit

This circuit will warn you the moment there’s a power failure or an interruption in the mains. In some specific situations it might be crucial to understand whether the mains that powers some appropriate system or circuit is missing. How the power failure alarm functions This suggested circuit is hooked up to the power mains […]

Read More »

Motion Activated PIR Relay Circuit

The submit reveals an easy motion activated PIR relay circuit widely available for activating lights only in the occurrence of a human, as a result conserving important electric power. Following is an ordinary circuit that activates a relay when a living being (a human) is detected by the PIR sensor. Here PIR symbolizes Passive Infrared […]

Read More »

How Microwave Sensors Work

The KMY24 microwave sensor module is planned and constructed on the thought of Doppler result. When appropriately designed it radiates an unfavorable power microwave signal of around 2.45 GHz across the guided place. When an object (focus on) that might be possibly a human being, is offered in the range of the released signal, the […]

Read More »

Stop Dog Barking with this Circuit

The mentioned circuit is made to deter dogs from barking in the specific area by the systems of a synchronized ultrasonic sound waves due to a number of preliminary barking of a specific dog. The circuit once appropriately designed will generate a very high pitched ultra sonic sound whenever it detects a dog bark. Because […]

Read More »

Simple Fire Alarm Circuit

The post discusses a simple fire alarm circuit that you can build and install at home or shop. At the point when there is a fire breakout in the room the temperature increments. This ultra smaller and minimal effort blaze alert faculties fire breakout in light of this. Transistor BC177 (Q1) is utilized as the […]

Read More »