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Ultrasonic

Ultrasonic Burglar Alarm Circuit

Last Updated on January 3, 2024 by Swagatam 20 Comments

ultrasonic burglar alarm circuit

An ultrasonic burglar alarm circuit is an electronic device which transmits ultrasonic waves to detect the movement of an intruding person. The ultrasonic waves hit the intruder and the reflected waves are picked up by the circuit. This reflected wave is used to activate a loud alarm which alerts the owner about the presence of […]

Filed Under: Security and Alarm Tagged With: Alarm, Burglar, Ultrasonic

Ultrasonic Motion Detector Circuit

Last Updated on May 3, 2023 by Swagatam 20 Comments

T and R 40 kHz ultrasonic transducer pair compressed

This ultrasonic motion detector circuit project picks up movement of any object including human beings from a distance of 4 to 7 meters away. As soon as the motion is detected, the output of the circuit illuminates a red LED indicating the presence of an obstacle or an intruder. However, using supplemental circuit stages connected […]

Filed Under: Sensors and Detectors Tagged With: Detector, Motion, Ultrasonic

Ultrasonic Detector Circuit [Extend your Ear’s Sensitivity]

Last Updated on January 8, 2024 by Swagatam 10 Comments

ultrasonic receiver compressed

The ultrasonic detector or receiver circuit will be able to detect all those high frequency sounds that are beyond the hearing capacity of humans. The units will be able to hear all those frequencies that are perhaps only audible to some animals like dogs, cats and bats. The ultrasonic receiver circuit can be used for […]

Filed Under: Sensors and Detectors Tagged With: Detector, Extend, Sensitivity, Ultrasonic

Ultrasonic Hand Sanitizer Circuit

Last Updated on October 4, 2020 by Swagatam 3 Comments

HC SR04 Ultrasonic Sensor

The ultrasonic hand sanitizer circuit detects the presence of human hand through reflected ultrasonic waves, and triggers a relay solenoid pump momentarily for dispensing the sanitizing liquid on the hands of the user. The project uses the popular HC-SR04 ultrasonic sensor module for the required sensing function. Using HC-SR04 The HC-SR04 ultrasonic sensor module is […]

Filed Under: Health related Projects Tagged With: Hand, Sanitizer, Ultrasonic

Ultrasonic Fire Alarm Circuit using Air Turbulence Detection

Last Updated on October 3, 2020 by Swagatam 8 Comments

ultrasonic fire circuit min 1

The simple ultrasonic fire alarm circuit I have explained below detects a fire hazard situation by picking up the variations in the surrounding air waves, or the air turbulence. The high sensitivity of the circuit ensures that even the slightest of air turbulence created by a temperature difference or fire is quickly detected and an […]

Filed Under: Security and Alarm Tagged With: Alarm, Detection, Fire, Turbulence, Ultrasonic

6 Best Ultrasonic Circuit Projects for Hobbyists and Engineers

Last Updated on July 2, 2023 by Swagatam 112 Comments

555 ultrasonic

In this post I have explained a 6 very useful yet simple ultrasonic transmitter and receiver circuit projects which can used for many crucial applications, such as ultrasonic remote control, burglar alarms, electronic door locks, and for listening to frequencies in the ultrasonic range which are normally inaudible to human ears. Introduction Many commercial ultrasonic […]

Filed Under: Mini Projects Tagged With: Best, Engineers, Hobbyists, Projects, Ultrasonic

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