Acoustic Circuit s Acoustic/Ultrasonic Circuits: Last Updated: December 25, 2017 01:43 PM Circuits Designed by Dave Johnson, P.E.: 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 29, 2006 This crystal controlled circuit drives a 40KHz piezo transducer with a 30v peak to peak signal.. Hobby Circuit designed by David A. Johnson P.E.-July 9, 2006 This crystal controlled circuit drives a 40KHz piezo transducer with a 30v peak to peak signal.. Circuit by Dave Johnson P.E.-July 9, 2006. Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors: - circuit presented here can be used for connecting two telephones in parallel and also as a2-line intercom. 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..

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Circuit by David A. Johnson P.E.-January 29, 2006 This crystal controlled circuit drives a 40KHz piezo transducer with a 30v peak to peak signal..

Hobby Circuit designed by David A. Johnson P.E.-July 9, 2006 - Do you need to add a distance sensor to your embedded project? Build this simple ultrasonic range finder!

Jan 28, 2016 - Building driving circuit for ultrasonic transducer - 100khz 60W. I would advise you to use a transformer and a push-pull amplifier FET. I am looking for a circuit diagram for a high power ultrasonic amplifier.Needs to drive an underwater transducer rated at 50 watts.Currently using a single Hfet driving a 1:25 toroid to 1000vpp, but I need to increase the duty cycle past 1% for more output power.

This quick dirty PIC ultrasonic range finder will find a place in numerous projects: presence detector, robotics, car parking, distance. 01/21/99 EDN-Design Ideas - (Scroll to find this one) As digital communications and data compression/decompression proliferate, signal-processing functions grow in importance. Whether you’re dealing with hard-wired logic or programmable engines, an understanding of binary-arithmetic rounding is important in getting correct and consistent results.

Before we discuss rounding, consider a binary number (Figure 1) Page includes several designs. __ Circuit Design by Tom Balph, Motorola SPS, Tempe, AZ 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 WilliamsApr 26th, 2011 The Simple Bat Detector is a frequency division type device. Frequency division type detectors allow you to hear ultrasonic sound by digitally scaling the frequency down into the human hearing range. For instance, a western pipistrelle bat emits ultrasonic sound in the range __ Designed by Tony Messina-Las Vegas, NV 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 The Simple Bat Detector is a frequency division type device. Frequency division type detectors allow you to hear ultrasonic sound by digitally scaling the frequency down into the human hearing range. For instance, a western pipistrelle bat emits ultrasonic sound in the range __ Designed by Tony Messina-Las Vegas, NV Detect objects through ultrasonic sound waves. __ Contact: Jameco Electronics - Circuit Ideas for Designers App Note __ Advanced Linear Devices, Inc - Circuit Ideas for Designers App Note __ Advanced Linear Devices, Inc - Everybody knows the speed of the sound in the dry air is around 340 m/s.