ultrasound circuits - related electronic projects and circuit diagrams (schematics), this helps you finding desired informations and facilitates your site navigation through all articles database. In every website page you will find a special section (at the beginning or the end) with tags just like this and also different tags associated with the current article. Tags inter-links stories with related ultrasound articles.
This circuit generates inaudible ultrasound to make a barrier across the entry. At the moment the circuit detects a break in the sound barrier, it generates a loud alarm indicating the entry of a person. This can be used to protects the entry passages and helps to detect unauthorized entry of persons in protected areas.
Ultrasonic Pest Repellers are used as substitute for Mosquito coils and liquids to avoid inhaling of toxic fumes. It is the non toxic way to repel pests like mosquitoes.This article describes the relationship between Ultrasound and Insects.
D.MOHAN KUMAR
