laser security alarm project

The laser security alarm circuit utilizes laser sensors for intruder detection. The main components of the laser security alarm circuit are infrared motion sensors and an alarm unit. It works by heat detection radiating from a … Read more

Laser Security Alarm Circuit

darkness detector circuit using ldr

A darkness detector is a circuit that detects darkness using light-dependent resistors, it’s used to automatically turn on the lights when it becomes dark. Hardware Components The following components are required to make Darkness Detector … Read more

Darkness Detector Circuit Using LDR

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Nowadays, different types of doorbells are available in the market and they produce different types of sounds depending on their circuitry. The most commonly used doorbells in the home produce “ding dong” sound and we … Read more

Ding Dong DoorBell Circuit using 555 timer

555 timer modes

The 555 timer IC was developed by Signetic Corporation in the year 1970. It is basically a monolithic timing circuit that produces accurate and highly stable time delays and it is used in many applications … Read more

555 Timer IC Operating Modes

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

Simple Panic Alarm Circuit