A X100 transistor Amplifier is followed by a zero cross detector circuit, using a voltage comparator. The output is a TTL logic signal, corresponding to the received 40KHz signal[.. Circuit by David A. Johnson P.E., 01/29/06] - This crystal controlled circuit drives a 40KHz piezo transducer with a 30v peak to peak signal[..

Sep 29, 2013 - I am looking for a circuit diagram for a high power ultrasonic amplifier. Needs to drive an underwater transducer rated at 50 watts. Ultrasonic generator circuit and ultrasonic generator to drive ultrasonic transducer for cleaning,its frequency from 17khz to 135khz,voltage 110v-120v,220v. Lego mindstorms scorpion program.

Hobby Circuit designed by David Johnson P.E., 01/29/06] - This crystal controlled circuit drives a 40KHz piezo transducer with a 30v peak to peak signal[.. Circuit by Dave Johnson P.E., 01/29/06]. A X100 transistor amplifier is followed by a zero cross detector circuit, using a voltage comparator. The output is a TTL logic signal, corresponding to the received 40KHz signal..

Circuit by David A. Johnson P.E.-January, 2006 - This crystal controlled circuit drives a 40KHz piezo transducer with a 30v peak to peak signal.. Hobby Circuit designed by David Johnson P.E.-January, 2006 - Do you need to add a distance sensor to your embedded project? Build this simple ultrasonic range finder! This quick dirty PIC ultrasonic range finder will find a place in numerous projects: presence detector, robotics, car parking, distance__ - 04/21/11 EDN Technical Article: Use an ultrasonic transducer to measure air temperature in an olive jar. __ Circuit Design by Jim Williams, EDN's most revered contributor, passed away in June 2011 after a stroke.

- Build it and avoid those parking mishaps.__ SiliconChip - Linear Technology AN131 __ Designed by Jim Williams - Apr 26th, 2011 - Most readers would know that you can obtain small ultrasonic cleaners for jewellery and similar small items. So why not a much larger version? It would be great for cleaning automotive and other mechanical parts, fabrics which cannot be machine washed, ornate bric-a-brac and a host of other hard-to-clean items.__ SiliconChip - Detect objects through ultrasonic sound waves. __ Contact Jameco Electronics - Everybody knows the speed of the sound in the dry air is around 340 m/s.

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Send a short ultrasonic pulse at 40 Khz in the air, and try to listen to the echo. Of course you won't hear anything, but with an ultrasonic sensor the back pulse can be detected. If you know the time of the forth & back travel of the ultrasonic wave, you know the distance, divide the distance by two and you know the range from the ultrasonic sensor to the first obstacle in front of it. __ Designed by Bruno Gavand - 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 operating in the range of 30 to 50 kHz. __ Designed by Tomaz Lazar-Ljubljana, Slovenia - 04/21/11 EDN Technical Article: Use an ultrasonic transducer to measure air temperature in an olive jar. __ Circuit Design by Jim Williams, EDN's most revered contributor, passed away in June 2011 after a stroke.