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Acoustic Circuit
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Acoustic/Ultrasonic Circuits:  A - T      U - Z
 

Last Updated: December 25, 2017 01:43 PM

Circuits Designed by Dave Johnson, P.E. :

40Khz Ultrasound Receiver 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

40Khz Ultrasound Transducer Driver uses Medium Power 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

Medium Power 40Khz Ultrasound Transducer Driver 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:

2 Line Intercom Plus a Telephone Changeover Switch -  circuit presented here can be used for connecting two telephones in parallel and also as a2-line intercom.  

40Khz Ultrasound Receiver 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

40Khz Ultrasound Transducer Driver uses Medium Power 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

A Cheap Ultrasonic Range Finder -  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

A primer on binary-arithmetic rounding -  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

An introduction to acoustic thermometry 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.  He was 63.

An Ultrasonic Parking Radar Build it and avoid those parking mishaps. __ SiliconChip

AN131An Introduction to Acoustic Thermometry Linear Technology AN131 __ Designed by Jim WilliamsApr 26th, 2011

Bat Detector 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

Build a Large Ultrasonic Cleaner 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

Build a Simple Circuit Bat Detector 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

Build an Ultrasonic Proximity Detector Detect objects through ultrasonic sound waves. __ Contact: Jameco Electronics

Charge Integrator-175.0 -  Circuit Ideas for Designers App Note __ Advanced Linear Devices, Inc

Charge Integrator-42001.0 -  Circuit Ideas for Designers App Note __ Advanced Linear Devices, Inc

Cheap Ultrasonic Range Finder based on PIC16F877A with a 8MHz crystal -  Everybody knows the speed of the sound in the dry air is around 340 m/s.  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

Consider the Deboo Single-Supply Integrator -  App Note #DI392, July 2002 __ Maxim Integrated

Differential Integrator with Frequency Controlled Gain -  Circuit Ideas for Designers App Note __ Advanced Linear Devices, Inc

Dog Whistle -  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

Fast Integer Multipliers Fit In FPGA -  05/12/94 EDN-Design Ideas You can fit a fast and compact digital multiplier into a field-programmable gate array(FPGA].  The technique involves using small look-up tables to find partial products and then adding the partial products.  The key factor for making the design compact, fast, and easy to implement is to make the look-up tables for the partial products as small as possible.  This multiplier can quickly multiply a number by a constant; changing the constant momentarily takes the multiplier off-line __ Circuit Design by Kenneth David Chapman, Xilinx Ltd, byfleet, Surrey, UK

Guider Camera Signal Processing & Bias Voltages -  Each signal processing channel features a well-known dual-slope integrator circuit topology, optimized in this case for fast-settling time

Introduction to acoustic thermometry 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.  He was 63.

Introduction to Acoustic Thermometry Linear Technology AN131 __ Designed by Jim WilliamsApr 26th, 2011

IR Detector/Emitter This is a very basic infrared detector/emitter circuit.  One major downside of this circuit, is that ambient infrared light will interfere with its detecting obstacles __ Designed by Andy Wilson

Medium Power 40Khz Ultrasound Transducer Driver 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

PIC16F873 Ultrasonic Range Meter -  On these pages, I will introduce the Ultrasonic Range Meter with PIC16F873.  As for the range meter which doesn't use PIC, refer to "Ultrasonic Range Meter".  I created the PCB pattern for this circuit using EAGLE CAD.  With this circuit, the following features of PIC16F873 are used. __ Designed by Seiichi Inoue

Receiver-Ultrasonic Switch -  The circuit described generates (transmits) ultrasonic sound of frequency between 40 and 50 kHz.  As with any other remote control system this cirucit comprises of a mini transmitter and a receiver circuit.  Transmitter generates ultrasonic sound and the receiver senses ultrasonic sound from the transmitter and switches on a relay __ Designed by Andy Wilson

Simple Light & Sound Indicator for Mains Power Supply -  While repairing or installing electrical machines in a building, the AC mains power supply is switched off from the mains electrical switchboard installed outside the building.  There is a chance that __ Electronics Projects for You


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Acoustic Circuits

Acoustic/Ultrasonic Circuits:  A - T      U - Z


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