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Simple Ultrasonic Sound Sensor Alarm Circuit using Opamp

Last Updated on February 23, 2020 by Swagatam 9 Comments

This article discusses a simple ultrasonic sound sensor alarm circuit which may be appropriately set for detecting sound pressures well above the normal human listening capacity, that may range from […]

Filed Under: Mini Projects, Security and Alarm, Sensors and Detectors, Simple Circuits, Ultrasonic Projects

How to Make Ultrasonic Remote Control Circuit

Last Updated on June 17, 2020 by Swagatam 8 Comments

This ultrasonic remote control circuit can be used to switch and control any appliance ON/OFF through a relay in the receiver circuit. Written by: S.S. Kopparthy Using Ultrasonic Waves This […]



Filed Under: Remote Control, Ultrasonic Projects

How to Make Ultrasonic Directive Speaker Circuit

Last Updated on November 7, 2019 by Swagatam 126 Comments

parametric speaker circuit

The post explains the construction of a ultrasonic directive speaker system also called parametric speaker which may be used to transmit an audio frequency over a targeted spot or zone […]

Filed Under: Audio and Amplifier Projects, TL494 IC, Ultrasonic Projects

Ultrasonic Weapon (USW) Circuit

Last Updated on June 2, 2022 by Swagatam 97 Comments

transducer driver coil details

The post discusses a simple ultrasonic weapon circuit also called USW, using very ordinary parts such as IC 555 and a few other passive components to generate the required ultrasonic […]

Filed Under: Security and Alarm, Ultrasonic Projects



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