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Ultrasonic Circuits


An ultrasonic level or sensing system requires no contact with the target. For many processes in the medical, pharmaceutical, military and general industries this is an advantage over inline sensors that may contaminate the liquids inside a vessel or tube or that may be clogged by the product.

A common ultrasound application is an automatic door opener, where an ultrasonic sensor detects a person's approach and opens the door. Ultrasonic sensors are also used to detect intruders; the ultrasound can cover a wide area from a single point.

The flow in pipes or open channels can be measured by ultrasonic flowmeters, which measure the average velocity of flowing liquid. Ultrasonic Aplications includes motion sensors and flow measurements, non-destructive testings, ultrasonic range finders, ultrasound Identification (USID), imaging, acoustic microscopy, biomedical applications, ultrasonic cleaning, ultrasonic humidifiers, etc.


How the circuit works: The transmitter emits an ultrasonic signal (40kHz). The 555 timer chip of the transmitter provides the driving 40kHz signal. Every time the reset pin (pin4) of the 555 timer ...

'Electronic Circuit for Emitting Ultrasonic Sounds' job on Work on this job or post your own for free!

It's well known that many animals are particularly sensitive to high-frequency sounds that humans can't hear. Many commercial pest repellers based on this principle are available, most of them oper...

This pre-assembled sensitive ultrasonic motion detector circuit uses a quartz crystal to lock the detector frequency for maximum stability and reliabi.

Secondly an ultrasonic wave transmitter consists of IC3/1, IC3/2, IC3/3, C15, R27, R28 and VR4. They IC3/2 and IC3/3 are oscillator generator circuit with frequency about 40 Khz, then they is ampli...

Explaining the difference in two Branson Ultrasonic Cleaners ( CPX1800 & CPX1800H ) and why we need to use ultrasonic cleaners for electronic circuit board repair and assembly. Posted on November 2...

Ultrasonic PCB cleaning

Ultrasonic Humidifier Circuit for Nebulizer, Atomizer & Fogger

ultrasonic sound generator (3-4 W) with tweeter (schematic)

Ultrasonic sensor. Operating principle