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Topic: Potentiometer


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In the News (Sun 19 Nov 17)

  
  Potentiometer as a voltage divider : DC CIRCUITS
Potentiometers are variable voltage dividers with a shaft or slide control for setting the division ratio.
Manufactured potentiometers enclose a resistive strip inside a metal or plastic housing, and provide some kind of mechanism for moving a "wiper" across the length of that resistive strip.
Some rotary potentiometers have a spiral resistive strip, and a wiper that moves axially as it rotates, so as to require multiple turns of the shaft to drive the wiper from one end of the potentiometer's range to the other.
www.allaboutcircuits.com /vol_6/chpt_3/6.html   (640 words)

  
 Potentiometer
Potentiometers can be used to allow a change in the resistance in a circuit or as a variable voltage divider (in the case of a volume control).
These are general purpose potentiometers and may be used for controlling DC voltage (as it did in the diagram) or to control the levels of the individual bands on an equalizer.
If you are using the potentiometer to control a signal with significant current flow, you'd have to calculate the power dissipation across its resistive element and use a potentiometer of a sufficient power rating.
www.bcae1.com /potentio.htm   (1139 words)

  
 The Potentiometer Specialists. Precision Sales- Worldwide shipping.
We specialize in precision potentiometers, custom pot configurations and wipers and elements.
Potentiometers, military / industrial turns counting dials, pressure transducers, wiper and elements, special devices
single and multi turn counting dials for potentiometers.
www.precisionsales.com   (187 words)

  
  Potentiometers
The slide-wire potentiometer was invented by Johann Christian Poggendorff (1796-1877) in 1841.
The potentiometer is a Leeds and Northrup Type K model, which was a standard piece of apparatus in most college and university electrical measurements laboratories for the first half of the 20th century.
The potentiometer was used with an external standard cell and an external galvanometer.
physics.kenyon.edu /EarlyApparatus/Electrical_Measurements/Potentiometer/Potentiometer.html   (505 words)

  
  Potentiometer having switching function - Patent 4647897
The potentiometer of claim 1 wherein said conductive branch is formed in the shape of an arc having substantially the same radius of curvature as said resistive element.
The resistance provided by a potentiometer ranges from a very small resistance to a maximum resistance which is arbitrarily chosen by the user for the particular application involved.
A problem with potentiometers is that a wiper arm which traverses a resistive element must always rest on a portion of the resistive element, even near its termination point, such that there are no abrupt transitions in voltage from one portion of the resistive element to another.
www.freepatentsonline.com /4647897.html   (1246 words)

  
  Potentiometer Input
Potentiometers of almost any value can be accommodated, but certain parameters are easier and less expensive to accomplish if the potentiometer resistance is kept in certain limits.
The potentiometer is an adjustable voltage divider that gives an output voltage proportional to the position of the slide from the reference end of the potentiometer.
In applications where the potentiometer is never still, such as a position servo loop, the constant movement of the wiper, due to noise jitter in the loop, wears out the element quickly.
www.wici.com /oem/interest/potinput.htm   (398 words)

  
 Potentiometer - Patent 5323137
The potentiometer as defined in claim 1 wherein two trimmable resistors are connected in parallel to the resistive element between the ground terminal and the power terminal.
The potentiometer as defined in claim 1 wherein the reference voltage terminal is connected to the second power supply for generating the reference voltage.
In the conventional potentiometer, a position of the housing has to be adjusted with respect to an object to be detected in order to compensate the offset.
www.freepatentsonline.com /5323137.html   (1760 words)

  
 Industrial 0V to +10V Digital Potentiometer - Maxim/Dallas
If an operator must set the motor speed manually while observing the process, the component of choice is usually an industrial-grade potentiometer, whose wiper produces a 0V to 10V signal that feeds back to a motor controller in the control room.
Such potentiometers are expensive and prone to wear.
The result is a direct drop-in replacement for the wear-prone mechanical potentiometer, and it occupies the same space within an electrical enclosure.
www.maxim-ic.com /appnotes.cfm/an_pk/843   (601 words)

  
 ePanorama.net :: View topic - Low-torque Potentiometer
I'm looking for a potentiometer or trimmer with a low torque.
I'll be using this to measure the height of a stack of paper.
connected to the potentiometer pivots according to the height of the
www.epanorama.net /phpBB2/viewtopic.php?t=5539&start=0&postdays=0&postorder=asc&highlight=   (947 words)

  
 Potentiometer on Alibaba.com - Find Potentiometer manufacturers, suppliers, exporters, wholesalers, traders, ...
Potentiometer on Alibaba.com - Find Potentiometer manufacturers, suppliers, exporters, wholesalers, traders, distributors, importers and more.
Alibaba.com connects you directly to pre-qualified Potentiometer manufacturers and exporters from China and around the world.
Alibaba.com membership is 100 percent free for buyers, and with it, you get access to the world's largest B2B marketplace of manufacturers and exporters in the world for Potentiometer.
hotproducts.alibaba.com /manufacturers-exporters/Potentiometer.html   (375 words)

  
 Rotary Potentiometer
The main difference is that the shaft of the rotary potentiometer converts rotary motion into a change of resistance.
The single-turn potentiometer allows the rotating shaft to move the wiper from one end of the fixed resistor to the other in one shaft rotation.
The rotary potentiometer is used in applications such as indicating the position of welding turntables.
www.data-acquisition.us /industrial_electronics/input_devices_sensors_transducers_transmitters_measurement/Rotary_Potentiometer.html   (257 words)

  
 Arduino - Potentiometer
A potentiometer is a simple knob that provides a variable resistance, which we can read into the Arduino board as an analog value.
The third goes from analog input 2 to the middle pin of the potentiometer.
By turning the shaft of the potentiometer, we change the amount of resistence on either side of the wiper which is connected to the center pin of the potentiometer.
www.arduino.cc /en/Tutorial/Potentiometer   (259 words)

  
 Potentiometer: Single-Turn and Multi-Turn Potentiometers
Precision rotary potentiometers are primarily used in industrial applications for measurement, control and automation tasks.
Multi-turn potentiometers are utilized where a higher accuracy in adjustment, control and measuring is required, or where the measurement requires multiple revolutions.
The single-turn potentiometer is often used as an angle position sensor (transducer) or as a panel controller where the rotation is less than one full revolution.
www.p3america.com /precision_potentiometers.htm   (205 words)

  
 What is a Potentiometer?
When used to regulate current, the potentiometer is limited by the maximum resistivity of the strip.
At one end, the cell is connected in series to the second circuit, and at the other end it is connected to a potentiometer in parallel with the second circuit.
The potentiometer in this arrangement drops the voltage by an amount equal to the ratio between the resistance allowed by the position of the third terminal and the highest possible resistivity of the strip.
www.wisegeek.com /what-is-a-potentiometer.htm   (382 words)

  
 Glossary of Terms
The wiper of the potentiometer is required to be excited by a specified current and moved at a specified speed.
The body of the potentiometer is held fixed and the shaft is rotated with a specified load applied radially to the shaft.
The perpendicularity of the mounting surface with respect to the rotational axis of the shaft, measured on the mounting surface at a specified distance from the outside edge of the mounting surface.
www.potentiometer.com /glossary.asp   (1083 words)

  
 Potentiometer Digitizer   (Site not responding. Last check: )
On this particular joystick, the handle is interconnected to two potentiometers such that the resistance of one control changes with respect to left-right movement while the resistance of one control changes with respect to forward-backward movement.
The digitizer's circuitry then alternately converts each potentiometer's resistance into a seven bit binary count that is fed to your microcomputer thru the input side of a standard eight bit parallel interface.
An updated value of each potentiometer's position is generated by the circuitry approximately fifty times a second.
www.swtpc.com /mholley/PPG/Joystick.htm   (671 words)

  
 potentiometer. The Columbia Encyclopedia, Sixth Edition. 2001-05
The ends of the resistance element are attached to two input voltage conductors of the circuit, and the third contact, attached to the output of the circuit, is usually a movable terminal that slides across the resistance element, effectively dividing it into two resistors.
Since the position of the movable terminal determines what percentage of the input voltage will actually be applied to the circuit, the potentiometer can be used to vary the magnitude of the voltage; for this reason it is sometimes called a voltage divider.
Typical uses of potentiometers are in radio volume controls and television brightness controls.
www.bartleby.com /65/po/potentio.html   (198 words)

  
 Potentiometer Circuits - Electronic Resource - Hobby Projects
Circuit forms industrial grade digital potentiometer: 09/20/2001 EDN - Design Ideas / Both ac and dc motors in modern industrial systems often receive their control from PLCs (programmable-logic controllers) in a control room safely away from the process.
Digital potentiometer programs and stabilizes voltage reference: 05/30/2002 EDN - Design Ideas / The potentiometer portion of a mixed-signal, digitally programmable potentiometer adds variability to an analog circuit, and its digital controls provide programmability.
Electronic potentiometer system has pushbutton interface: 09/26/2002 EDN - Design Ideas / As systems grow smaller, it becomes increasingly attractive to replace mechanical potentiometers with electronic potentiometers, which are smaller and less expensive silicon equivalents.
www.hobbyprojects.com /P/Potentiometer_Circuits.html   (1452 words)

  
 Potentiometer Electronic Circuits, page 2
Circuit forms industrial grade digital potentiometer: 09/20/01 EDN Design Ideas / (added 1/05) Both ac and dc motors in modern industrial systems often receive their control from PLCs (programmable-logic controllers) in a control room safely away from the process.
CMOS IC Makes Low Cost Digital Potentiometer: 01/18/96 EDN-Design Ideas / (added 08/05) A growing trend in the design of electronic equipment is to replace analog knobs used to increase or reduce a continuous signal (such as volume or brightness) with "up" and "down" keys.
Electronic potentiometer system has pushbutton interface: 09/26/02 EDN Design Ideas / (added 10/03) As systems grow smaller, it becomes increasingly attractive to replace mechanical potentiometers with electronic potentiometers, which are smaller and less expensive silicon equivalents.
www.discovercircuits.com /P/potentio2.htm   (1154 words)

  
 Digital Potentiometer Macro - Fall 2002
Instead of a mechanical wiper, the wiper position in a digital potentiometer is determined by the events on logical inputs.
The basic modeling of the digital potentiometer macro consists of a 256 bit counter whose outputs are sent to a DtoA converter.
The three outputs of the potentiometer are the outputs H, W, and L. These correspond to the high terminal, wiper terminal, and low terminal of the potentiometer.
www.spectrum-soft.com /news/fall2002/digpot.shtm   (1472 words)

  
 POTENTIOMETER
Pencil jockey is replaced by heavy brass NP spring type sliding jockey.
The said potentiometer is also supplied with pulley arrangement system to tight the wires.
The L shape end connectors are given on the strips which adjust both the ends for faulty 0 and end setting.
www.zodiacindia.com /POTENTIOMETER.htm   (423 words)

  
 potentiometer - Research the news about potentiometer - from HighBeam Research
A conventional potentiometer or pot is an analog device used to vary, or control...
Yet it also has acted as a catalyst for the increased demand of potentiometers as a means for the user or the machine...
Smart potentiometer, display key calibration: microprocessor-based device permits precise set-point calibration in any units.
www.highbeam.com /search.aspx?q=potentiometer&ref_id=ency_botnm   (829 words)

  
 Potentiometer: Linear Motion Potentiometers
Linear Motion Potentiometers are utilized in control and automation tasks to measure axial displacement (linear motion).
Linear Motion Potentiometers operate on the principle of a linear resistive voltage divider, i.e.
A wide range of options are usually available for most potentiometer models.
www.p3america.com /linear_motion_potentiometers_text.htm   (131 words)

  
 Potentiometer Switch withstands adverse conditions., Wilbrecht Electronics, Inc.
December 17, 2001 - Environmentally sealed with transfer-molded epoxy resin and O ring shaft seal, PA 400 potentiometer switch is resistant to elevated temperatures, corrosion, moisture, water and bodily fluids.
Environmentally sealed with transfer-molded epoxy resin and "O" ring shaft seal, the PA 400 potentiometer switch is resistant to elevated temperatures, corrosion, moisture, water, and bodily fluids.
Jun 13, 2003 - Potentiometer handles extreme environments.
news.thomasnet.com /fullstory/5432   (784 words)

  
 für, Stufe, Knopf, ob, heute, PKW Potentiometer
Potentiometer (Potis) werden häufig zur Steuerung von elektrischen Geräten eingesetzt (z.
Potentiometer bestehen aus einem linearen (Schieberegler) oder kreissegmentförmigen Träger, auf dem ein Widerstandsmaterial aufgebracht ist.
Potentiometer gibt es als Bedienelement mit einer Welle und aufgesetztem Drehknopf oder als Schiebepotentiometer.
www.dbilink.de /Potentiometer.html   (357 words)

  
 String Potentiometer and String Encoder Frequently Asked Questions
rotating the potentiometer - for position transducers that use cam locks, the cam locks can be loosened and the potentiometer rotated to achieve the desired output; for units with multiturn potentiometers, exercise caution to ensure the spring torque is not applied to the fragile potentiometer wiper tracking mechanism
All standard analog-output SpaceAge Control position transducers use conductive plastic or hybrid potentiometers that should be used as voltage dividers (voltage measurement) and not rheostats (resistance measurement).
This procedure is not valid for units with multi-turn potentiometers (eighth digit of part number is a "3" or "5": 162-3405, for example).
www.spaceagecontrol.com /ptfaqs.htm   (2039 words)

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