Ultrasonic Alarm Circuit USING LM741

Introduction Ultrasonic alarms emit high-frequency sound waves that are not audible to the human ear but can be used to detect the presence of objects or movements within a specific range. These alarms are widely … Read more

Ultrasonic Alarm Circuit LM741

Sound Operated Music Bell

Introduction Picture a world where a beautiful melody chimes in response every time a sound is made. With a bit of creativity and some basic materials, this world can be a reality with the creation … Read more

Sound Operated Music Bell

How to make a Laser Security Alarm

Introduction Safety is a major concern around the World. Many people employ gatekeepers, for this purpose but many times these guards also get hit by intruders. The LASER-Based Security Alarm is a safety purpose circuit … Read more

How to make a Laser Security Alarm

Police Siren Circuit using NE555

Introduction We have heard many electronic sounds like a doorbell, phone alarm, and vehicle horn but the sound which makes people scared and worried is the siren of a police van. It would be a … Read more

Police Siren Circuit using NE555

Infrared Sensor Detector Circuit

Introduction As electronic students, we have always heard that IR technology is used extensively in the Industrial sector for making different devices and products. For example, the television we used in our homes uses an … Read more

Infrared Sensor/Detector Circuit