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Sensors / Detectors:  Position 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:

2 ADC channels double sensor precision -  03/18/99 EDN Design Ideas:  (PDF contains multiple circuits, scroll to find this circuit) The accuracy of the onchip ADCs of numerous small and inexpensive 8-bit mPs is well-suited for many applications.  However, some  situations benefit from.   PDF contains multiple circuits, scroll to find this circuit __ Circuit Design by Luke J Barker, Reinke Manufacturing Co Inc,Deshler, NE

Active Voltage Positioning Reduces Output Capacitors -  DN224 Design Notes__ Linear Technology/Analog Devices

Autozero a position-sensing Detector -  03/18/99 EDN Design Ideas:  Autozeroing schemes can be necessary to minimize the input-offset voltages of position-sensing detectors (PSDs) , particularly when you use these detectors with high dc gain.  PSDs are useful optical transducers for accurately measuring displacement.  in practice, their typical configuration is as a differential current-to-voltage circuit (Figure 1).   __ Circuit Design by James Zannis, Renishaw S A, Champs-sur-Marne, France

Autozeroed Amplifier with halved noise needs few components -  10/25/07 EDN Design Ideas:  The unique architecture of the Analog Devices AD8553 instrumentation amplifier permits paralleling devices to lower noise __ Circuit Design by Marián Štofka, Slovak University of Technology, Bratislava, Slovakia

Biasing Corrects Position-Sensing Photodiode -  07/07/94  EDN Design Ideas:  An integrator powers the light source in Fig 1's position-sensing circuit, eliminating errors arising from variations in the source's intensity.  This circuit's accuracy is essentially that of the sensor itself, beating designs that use a more complex anal __ Circuit Design by Yishay Netzer, Consultant, Yuvalim, Israel

Daggerboard Position Detector -    NOTE: Must register on this site __ Designed by Published in Elecktor July/Aug, 2010

Digital position encoder does away with ADC -  05/08/97 EDN Design Ideas:  The position encoder in Figure 1 is a simple yet powerful circuit that converts the change in resistance of a potentiometer into a digital value without using an expensive A/D converter.  The working principle is a resistance-to-PWM converter built around the common 555 timer IC .  A change in the potentiometer's __ Circuit Design by Jose Carlos Cossio, Santander, Spain

Model fixed-point DSP arithmetic in C -  03/18/99 EDN Design Ideas:  NOTE:      - Page
includes several designs.  Scroll to find this one.  You can run initial high-level simulations of custom numerical algorithms, such as digital filters, using floating-point numbers in an environment such as C or Matlab.  Unfortunately, you won't see include fixed-point effects, such as truncation due to limited precision and register overflow, until you use a Hardware Design Language (HDL) , such as Verilog or VHDL.  However, a technique that models these effects in C—the function "bit_limit" in Listing 1—provide as faster execution and better portability than HDLs and allows early exploration of the trade-off between bus width and performance.   __ Circuit Design by Roger Maher, SSL Ltd, Dublin, Ireland

Park Aid -  Three LEDs signal bumper-barrier distance; infra-red operation, indoor use __ Contact Flavio Dellepiane, fladello @ tin.it

Park-Aid Modification -  Three-step beeps signal bumper-barrier distance; infra-red operation, indoor use __ Contact Flavio Dellepiane, fladello @ tin.it

Position Detectors provide Motor-control logic -  05/24/01 EDN Design Ideas:  in the circuit of Figure 1 , assume that a brush-type dc motor must drive a load back and forth between two endpoints on a lead screw.  Optical sensors determine end of travel, and an SPDT switch selects to which end to send the load.  The sensors themselves supply all the necessary directional logic, and a TRIAC powers the motor with the necessary polarity of half-wave pulses from the 13.   PDF have several circuits, scroll for this one __ Circuit Design by Steve Pomeroy and Russell Hedges, Elgar Corp, San Diego, CA

Position sensing of liquid metal antennas for beam scanning antenna arrays -  03/17/14 - EDN Design Ideas:  High gain beam scanning arrays are usually implemented using phased antenna arrays or mechanically controlled parabolic dishes.  However, the aforementioned technologies are widely known as costly ones.  Recently, a new design of beam scanning arrays has been introduced using the liquid metal technology.  Specifically, the antenna is made of a liquid metal volume that is encapsulated in channels and moved mechanically using a single mechanical pump __ Circuit Design by Ahmad Gheethan-1st prize winner in the TI LDC1000 design contest 2014

Rotary Controller Positions Stepping Motor -  EDN Design Ideas:  08/03/95    The circuit in Fig 1 uses a servo potentiometer, as opposed to a rotary switch or encoder, to provide the necessary drive pulses for a stepping motor.  This motor positions a pointer by the rotation of a manual control.  The circuit must be precise, allow a rapid response, and be simple to use. (This circuit was part of a complex apparatus used for a series of physiological tests.) Another requirement is that the control had to be a small, handheld, battery-operated device.    __ Circuit Design by TG Barnett and ME Rosenberg, Department of Physiology, Queen Mary and Westfield College, London, UK

Two ADC channels double sensor precision -  03/18/99 EDN Design Ideas:  (PDF contains multiple circuits, scroll to find this circuit) The accuracy of the onchip ADCs of numerous small and inexpensive 8-bit mPs is well-suited for many applications.  However, some  situations benefit from.   PDF contains multiple circuits, scroll to find this circuit __ Circuit Design by Luke J Barker, Reinke Manufacturing Co Inc, Deshler, NE

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Position Sensors / Detectors / Monitors

 


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