Electronic Circuits and electronic circuits, electronic schematics plus an extensive resource for hobbyists, inventors and engineers

DiscoverCircuits.com has links to 45,000+ electronic circuits, cross-referenced
into 500+ categories.    We have searched the web to help you find quick design ideas.

HOME Schematics Hobby Corner Dave's Circuits Electronic Resources Contact Info
Imagineering Ezine    Discover Solar Energy Dave Johnson & Associates Faraday Touch Switches
Welcome to DiscoverCircuits.com - online since 2002

See Media Kit for
Advertising Opportunities

Attention Designers:  Please alert us by eMail if we have linked to sites
where your original material has been copied without your permission.
We will change to the LINK to your site.  
Thank you.

 


Sensors / Detectors:  Proximity Detectors

Sensors / Detectors -- Main Page

 

Last Updated: October 18, 2017 05:04 AM


Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

555 Based IR Proximity Detector -  Scroll down for this project.     Sometimes you want a simple solution to a problem and you don't mind if your main controller has to do the work.  This iRPD requires the main robot processor to choose which side to look at, and requires it to "debounce" the results for reliably operation.  But, it still works really well without any complex program code. __ Designed by Dennis Clark

555 Based IR Proximity Detector -  Sometimes you want a simple solution to a problem and you don't mind if your main controller has to do the work.  This iRPD requires the main robot processor to choose which side to look at, and__ 

Body Detector -  if someone comes within cooee it will catch 'em! __ SiliconChip

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

Detect Digital RFSignals -  The F.E.D. (Frequency Emissions Detector) will, of course, detect anyone's cell phone, so the detector really responds to just about anybody with more than two pennies to rub together.  Most phones occasionally transmit short bursts to the nearest cell tower, even when the phone isn't in use, so a typical 21st century loiterer will eventually set off the detector.  On the other hand, a deer can stare at it for an hour with no effect.  Let's face it, even most burglars emit digital signals these days.  So, in a sense, the F.  E.  D.  is a human detector.  With that in mind, consider using the output to activate a digital camera or video recorder to capture a record of the prowlers.  A recorded barking dog or, one of my favorites, a recording of police radio traffic will scare off most crooks.  Add some hidden flashing red and blue lights to the police chatter and the culprits will actually run away.   __  Contact:  Charles Wenzel of Wenzel Associates, Inc.

Dual Comparator -  forms temperature-compensated proximity Detector __ Maxim Integrated

Dual comparators stabilize proximity Detector -  02/16/98 EDN Design Ideas:  (File contains several circuits, scroll to find this one)  __ Circuit Design by Arthur Harrison, US Army Research Laboratory, Adelphi, MD, and Joseph Stern, Maxim Integrated Products, Sunnyvale, CA

Frequency Emissions Detector -  The F.E.D. (Frequency Emissions Detector) will, of course, detect anyone's cell phone, so the detector really responds to just about anybody with more than two pennies to rub together.  Most phones occasionally transmit short bursts to the nearest cell tower, even when the phone isn't in use, so a typical 21st century loiterer will eventually set off the detector.  On the other hand, a deer can stare at it for an hour with no effect.  Let's face it, even most burglars emit digital signals these days.  So, in a sense, the F.  E.  D.  is a human detector.  With that in mind, consider using the output to activate a digital camera or video recorder to capture a record of the prowlers.  A recorded barking dog or, one of my favorites, a recording of police radio traffic will scare off most crooks.  Add some hidden flashing red and blue lights to the police chatter and the culprits will actually run away.   __  Contact:  Charles Wenzel of Wenzel Associates, Inc.

High-Speed Op Amp Enables IR-Proximity Sensing -  06-Aug-09 EDN Design Ideas:  IR (infrared]-proximity sensors can sense the presence of an object, its distance from a reference, or both.  Applications include speed detection, sensing of the hand in automatic faucets, automatic counting or detection of objects  __ Circuit Design by Arpit Mehta, Maxim Integrated Products Inc, Sunnyvale, CA

Infrared beam barrier / proximity Detector -  This circuit can be used as an infrared beam barrier as well as a proximity detector.  The circuit uses the very popular Sharp IR module (Vishay module can also be used).  The pin nos.  shown in the circuit are for the Sharp & Vishay modules.  For other modules please refer to their respective datasheets.  The receiver consists of a 555 timer IC working as an oscillator at __ Contact http://www.tronicszone.com

Infra-red Level Detector -  Useful for liquids level detection and proximity devices; Up to 50 cm.  range, optional relay operation __ Contact Flavio Dellepiane, fladello @ tin.it

Infrared Motion Detector -  Pyroelectric infrared sensor and associated circuits detect infrared radiation from human or animal body.  General purpose motion detector with normally open relay output.16 pages.  __ Golab.com

Infrared Proximity Detector -  This proximity detector using an infrared detector (Fig.1) can be used in various equipment like automatic door openers and burglar alarms.  The circuit primarily consists of an infrared transmitter and...__ Electronics Projects for You

Infra-Red Proximity Detector -  The detector is intended for the recognition of obstructions at distances of a few millimeters to a few centimeters.  Similar detectors are used in the industry and health services, for instance, to open a water tap via a magnetic valve.  The sensor, IC 2, is a Type SFH900 optoisolator from Siemens or similar.  A phase-locked loop__ 

IR Proximity Sensor -  it is the same principle in ALL infra-Red proximity sensors.  The basic idea is to send infra red light through iR-LEDs, which is then reflected by any object in front of the sensor.  Then all you have to do is to pick-up the reflected IR light.  For detecting the reflected IR light, we are going to use a very original technique: we are going to use another iR-LED, to detect the IR light that was emitted from another LED of the exact same type! This is an electrical property of Light Emitting Diodes (LEDs) which is the fact that a LED Produce a voltage difference across its leads when it is subjected to light.  As if it was a photo-cell, but with much lower output current.  __ 

Magnetic Proximity Switch -  Here is an interesting circuit for a magnetic proximity switch which can be used in various applications. The circuit, consists of a reed switch at its heart.  When a magnet is brought...__ Electronics Projects for You

Person Detector -  This is a circuit thich I originally included in my book, 22 Tested Transistor Projects, published by BabanI Press in 1976 (iSBN 0 900162 63 S).  it is one I had great fun with.  it uses the PUT Complimentary Feedback Pair as a sensitive detector of changing electric fields to switch on an oscillator and make a noise.  it is so sensitive that it can be difficult to get it working on a test bench because of all the electric fields, but put it on a table and leave it.   __ Designed by Richard Torrens

Proximity Alarm -  This simple circuit is sure to have the police beating a path to your door, however, it has the added advantage of alerting you to their presence even before their footsteps fall on the doormat.  The circuit transmits on Medium Wave (this is the small problem with the police).  IC 1a, together with a sensor (try a 20cm x 20cm sheet of tin foil) oscillates __ Designed by Rev. Thomas Scarborough

Proximity Detector -  Here is a Simple but Very Effective One __ Designed by G.L. Chemelec

Radio Wave Alarm -  This simple circuit is sure to have the police beating a path to your door, however, it has the added advantage of alerting you to their presence even before their footsteps fall on the doormat.  The circuit transmits on Medium Wave (this is the small problem with the police).  IC 1a, together with a sensor (try a 20cm x 20cm sheet of tin foil) oscillates __ Designed by Rev. Thomas Scarborough

RS-232C link Monitors animal activity -  11/06/97 EDN Design Ideas:  A common need in biological experimentation is the ability to unobtrusively monitor the activity of small caged animals, such as mice, rats, and rabbits, as they move about their enclosures.  This monitoring must be over long periods and around the clock.  The circuit in __ Circuit Design by W Stephen Woodward, University of North Carolina--Chapel Hill

The F.E.D. Detects digital RF signals -  The F.E.D. (Frequency Emissions Detector) will, of course, detect anyone's cell phone, so the detector really responds to just about anybody with more than two pennies to rub together.  Most phones occasionally transmit short bursts to the nearest cell tower, even when the phone isn't in use, so a typical 21st century loiterer will eventually set off the detector.  On the other hand, a deer can stare at it for an hour with no effect.  Let's face it, even most burglars emit digital signals these days.  So, in a sense, the F.  E.  D.  is a human detector.  With that in mind, consider using the output to activate a digital camera or video recorder to capture a record of the prowlers.  A recorded barking dog or, one of my favorites, a recording of police radio traffic will scare off most crooks.  Add some hidden flashing red and blue lights to the police chatter and the culprits will actually run away.   __  Contact:  Charles Wenzel of Wenzel Associates, Inc.

Ultrasonic Proximity Detector -  We the humans can hear sound of up to 20kHz frequency only. This proximity detector works at a frequency of 40 kHz. it uses two specially made ultrasonic transducers: One transducer...__ Electronics Projects for You

Ultrasonic Proximity Detector 2 -  This ultrasonic proximity detector comprising independent, battery-powered transmitter and receiver sections makes use of a pair of matched ultrasonic piezoceramic transducers operating at around 40 kHz each.  This circuit can be...__ Electronics Projects for You

Versatile Proximity Detector with Auto Reset -  Electrochemical processes taking place in our body generate complex sig-nals (hum) that are continuously being passed along the nerve fibres throughout the body.  Any physical activity such as muscle movement increases...__ Electronics Projects for You

Got Designs?
Please eMail
if you want me to link to and/or post your original design.  Thanks.


Sensors / Detectors:  Proximity Detectors

 


Imagineering Ezine    Discover Solar Energy Dave Johnson & Associates Faraday Touch Switches



 About Us   |  Advertise on DiscoverCircuits.com   |   Report Broken Links  |    Link to DiscoverCircuits.com  |   
Privacy Policy


Discovercircuits.com endeavors to credit original designers.   Please alert us by eMail so we can
delete links to material that have been copied without your permission
.   Thank you.


Copyright of all original material on this website is the property
of David A. Johnson, P.E. (Dave Johnson & Associates ) unless otherwise noted.  

Linking is ALLOWED but COPYING any content or graphics to your web site is EXPRESSLY PROHIBITED.
All material is provided "as is" without guarantees or warranty of any kind, either expressed or implied.