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Sensors / Detectors: Magnetic Sensors
Last Updated on:
Monday, August 18, 2008 04:18 PM

Sensors / Detectors -- Main Page

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

AN20 Magnetoresistive Sensors: Theory of Operation and Applications:  Zetec Semiconductors  Applications Notes An Introduction to Magnetoresistive sensor technology as used for current and magnetic field sensor products, including ory of operation, a description of parametric terms, and application circuit examples.   (app note added 2/06)

AN37 Basic Introduction to the use of Magnetoresistive Sensors:  Zetec Semiconductors  Applications Notes This application note provides an introduction to  rudiments of anisotropic magnetoresistive (AMR) sensors for those users who may be unfamiliar with ir characteristics and modes of operation and goes on to describe some applications, with guidelines to getting  best use out of  sensors.   (app note added 2/06)

AN-4145 / Electromagnetic Compatibility for Power Converters:  Fairchild Application Notes / (app note added 6/06)

App Note 5 - Precision Magnetic Deflection:  Apex Microtechnology Corp App Note (added 6/06)

Basic Introduction to the use of Magnetoresistive Sensors:  Zetec Semiconductors  Applications Notes This application note provides an introduction to  rudiments of anisotropic magnetoresistive (AMR) sensors for those users who may be unfamiliar with ir characteristics and modes of operation and goes on to describe some applications, with guidelines to getting  best use out of  sensors.   (app note added 2/06)

Build a Magnetic Field Immunity Tester:  (circuit / schematic design added 6/06)

Designing LF Talkback for a Magnetic Base Station:  Microchip Application Note Published 5-Mar-04   (app note added 6/06)

Electric Field and Leakage Detector:  (electronic Schematic added  02/05)

Electromagnetic Compatibility for Power Converters / AN-4145:  Fairchild Application Notes / (app note added 6/06)

Electromagnetic Emissions Test Report on Solid State Energy Meter:  Electro Analog Devices Application Notes  (app note added 6/06)  This report describes electromagnetic immunity testing performed on September 9, 1999 through September 10, 1999 on the Solid State Energy Meter. Testing was performed pursuant to IEC 1036:1996, a standard for alternating static watt-hour meters for active energy.

Electromagnetic Emissions Test Report on the AD7755:  AD7755 Analog Devices Application Notes  (app note added 6/06)  This document describes electromagnetic emissions testing performed on the Energy Meter (AD7755)   on September 8, 1999, pursuant to EN55022 requirements. It may be used to demonstrate compliance with the European Union emissions requirements pursuant to the EMC directive

Electromagnetic field detector:  (electronic design added 11/06)

Electromagnetic Field Detector #2:  This circuit is sensitive to low frequency electromagnetic radiation and will detect for example hidden wiring or the field that encompasses a transformer. Pickup is by a radial type inductor, used as a probe which responds well to low frequency changing magnetic and electric fields. Ordinary headphones are used to for detection. The field that surrounds a transformer is heard as a50 or 60Hz buzz. (added 6/06)

Electromagnetic field detector #3:  This lovely circuit is a real gem! Easy to assemble and more sensitive than many commercial devices available. It's based around an LF351 low-noise operational amplifier and a 1mF choke acting as the sensor. Unlike most other simple EMF detectors, this one has a meter output for accurate reading, but alternatively, you can also roughly estimate the frequency of the field by plugging in headphones. It can detect any field from 50Hz to 100kHz, making it highly versatile and a worthwhile addition to any hobbyist's workbench. (added 10/05)

High-isolation converters use off-the-shelf magnetics:  07/22/99 EDN Design Ideas  / (added 2/06) 

Magnetic Gun:  (electronic design added 11/06)

Magnetic Gun:  When optimally tuned, it will propel a small slug about 1.5 metres high, or 2.5 metres horizontally (added 8/03)

Magnetic Gun.:  (electronic design added 11/06)

Magnetic levitation device:  (electronic circuit added 4/05)

Magnetic proximity sensors:  (electronic circuit added 10/05)

Magnetic-Radiation Remote-Control:  Short-range 35KHz operation, single-channel unit Simple circuitry, no outer antennas required (added 02/05)

Magnetometer:  (circuit design added 8/03)

Magnetoresistive Sensors: Theory of Operation and Applications:  Zetec Semiconductors  Applications Notes An Introduction to Magnetoresistive sensor technology as used for current and magnetic field sensor products, including theory of operation, a description of parametric terms, and application circuit examples.   (app note added 2/06)

Method offers Fail Safe Variable Reluctance Sensors:  11/27/01 EDN-Design Ideas / (added 5/02) / Variable-reluctance sensors are preferred for industrial and automotive environments, because they sustain mechanical vibration and operation to 300°C. In most applications, they sense a steel target that is part of a rotating assembly. Because the unprocessed signal amplitude is proportional to target speed, .... 

Optical Magnetic Projection Booth System:  (circuit / schematic design added 6/06)

Precision Magnetic Deflection - App Note 5:  Apex Microtechnology Corp App Note (added 6/06)

RC Network Eliminates Precision Reference:  08/04/94 EDN Design Ideas / (added 5/02) The circuit in Fig 1 uses a magneto-resistive sensor to detect small magnet displacements without resorting to a precision voltage reference. A simple RC divider takes the place of the reference, eliminating an expensive component and obviating trimming each circuit....  

Two diodes change demagnetization signal polarity:  04/12/01 EDN-Design Ideas / (added 11/05)

Virtual instrument determines magnetic core's B-H-loop characteristics:  1/5/06  EDN Design Ideas  /  (added 11/06)  Inexpensive solution combines a laptop, DAQ card, and LabView.



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