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

Last Updated: June 02, 2021 01:44 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 and designs for engineers, hobbyists, students & inventors:

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. 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. 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

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 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. 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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