Introduction This guide will teach you how to make a Power ON Alarm with Auto OFF Circuit. This simple yet effective circuit is perfect for those who want to be alerted when their electronic equipment … Read more
alarm circuits
Introduction Nowadays safety is a major concern around the World. Many people employ guards for this purpose but many times these guards also get hit by intruders. The IR Based Security Alarm is a safety … Read more
IR Based Security Alarm using 555 Timer
Introduction Security is the major issue. Public places like malls, government places like parliament, and courts. edu In this tutorial, we are going to make a “PIR Burglar Alarm Circuit”. The PIR sensors have two … Read more
PIR Burglar Alarm Circuit
In this tutorial, we are going to make a “Door Open Alarm Circuit using Hall effect Sensor”. A door alarm is a very common and useful device for security purposes. They are used to detect … Read more
Door Open Alarm Circuit using Hall effect Sensor
Introduction Does that happen to you that you place your device for charging and someone removed the device to charge theirs? Does that make you angry? Because the time when you want the device to … Read more
Charger Circuit Failure Alarm
In this tutorial, we are going to make a “Door Knob Touch Alarm Circuit”. There are many simple alarm devices for personal use in bedrooms or hotel rooms. In which a metal chain attached to … Read more
Door Knob Touch Alarm Circuit
The Panic Alarm allows a person under duress to quickly call for help in the event of an emergency. There are many types of panic alarm circuits available. Some have a single pushbutton and others … Read more