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Potentiometer
Circuits, Page 2
Potentiometers:
#'s - A B - D
E - L M
- Q R - Z
Last Updated on:
Friday, March 12, 2010 12:07 PM |
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Links to electronic circuits,
electronic schematics, designs for engineers, hobbyists, students & inventors:
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Calibrated trim tool tweaks multiturn pots - 01/07/99 EDN-Design Ideas: Many
analog circuits contain multiturn trimming potentiometers whose settings you may
need to change during maintenance or calibration. Also, some instruments have
panel-mounted potentiometers that may need periodic adjustments. After disturbing
a setting by more than one or two turns, it becomes difficult or impossible to
restore the original setting. The usual method is to measure.....(design idea
added 08/05) |
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Calibrated trim tool tweaks multiturn pots - 01/07/99 EDN-Design Ideas:
[Note: File contains multiple circuits scroll to find this circuit] Many
analog circuits contain multiturn trimming potentiometers whose settings you may
need to change during maintenance or calibration. Also, some instruments have
panel-mounted potentiometers that may need periodic adjustments. After
disturbing.....(design idea added 11/05) |
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Circuit forms industrial grade Digital potentiometer - 09/20/01 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. If an operator must manually set the motor speed while observing
the process, the component of choice is usually an industrial-grade
potentiometer.....(design idea added 1/05) |
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CMOS IC Makes Low Cost Digital Potentiometer - 01/18/96 EDN-Design Ideas: 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. However, replacing a low-cost analog potentiometer with a
digital potentiometer can be costly. The low-cost circuit in.....(design idea
added 08/05) |
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Communicating with Daisy Chained MCP42XXX Digital Potentiometers - Microchip
Application Note Published 2-Apr-01 (app note added 2/06) |
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Comparing Digital Potentiometers to Mechanical Potentiometers - Microchip
Application Note Published 20-Nov-00 (app note added 2/06) |
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Convert Voltage to potentiometer Wiper setting - 09/05/02 EDN-Design Ideas:
The circuit in Figure 1converts an analog input voltage, VIN, to a proportional
wiper setting of a DPP (digitally programmable potentiometer). The potentiometer's
wiper setting, which varies from position 0 through 31, corresponds to the input
voltage, which varies from 0 to 1V dc. The CAT5114, IC5, is a 32-tap potentiometer
with an increment/decrement interface.....(design idea added 1/05) |
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DC Power Wire also Carries Clock or Data - 03/13/98 EDN-Design Ideas:
-High-side current-sense amplifier, IC1, offers a simple method of combining
low-speed clocks or other signals with dc power in cables between
subsystems.....(design idea added 03/03/03) |
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Difference Amplifier uses Digital potentiometers - 05/30/02 EDN-Design Ideas:
You sometimes need to measure a small signal in the presence of a large
common-mode signal. Traditional instrumentation amplifiers that use two or three
op amps in their internal structure find common use in these applications. The
circuit in Figure 1 presents an alternative approach that is useful when low cost
and low drift are important, but when.....(design idea added 12/04) |
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Digital Pot Adjusts LCD's Contrast - 02/04/99 EDN-Design Ideas: You
can use a digitally controlled potentiometer for many purposes. In this example, you
can use the device to regulate the contrast of a standard (such as two lines by 40
characters)LCD. You can use the circuit in Figure 1 in a portable test system, in
which you need to change the contrast of the LCD as a function of the viewing angle.
You choose the contrast setup from a menu and then use up or down buttons with µC IC1
to adjust the contrast. The µC stores the contrast value in the digital potentiometer,
IC2. This design uses a Xicor 10-k unit (dubbed "EEPOT"), but you could use other
devices in the design. The EEPOT connects to the LCD's VO line. You could
connect.....(design idea added 5/03) |
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Digital Pot Corrects for System Drift - 11/10/94 EDN-Design Ideas: The circuit in
Fig 1 looks simple but usually comes as a revelation to designers. Under control of
the system's µP, the digital potentiometer, IC1, becomes a variable set-point
reference that can adapt to the long-term drift of the variable measured. The digital
potentiometer replaces schemes involving A/D and D/A converters.....(design idea added
3/03) |
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Digital Potentiometer Controls LCD Bias - 03/17/94 EDN-Design Ideas: Designers of
pen-based computers can easily relegate some controls that were previously mechanical,
such as switches and potentiometers, to on-screen icons. For example, the circuit in
Fig 1 shows one way that digital logic can control the -24V-dc LCD bias using two
general-purpose I/O command lines. The DS-1669 from Dallas Semiconductor is a 64-step
potentiometer available in 10-, 50-, and 100-kV ranges. The up-count (UC).....(design
idea added 03/03/03) |
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Digital Potentiometer Controls Phase Shift - 02/15/96 EDN-Design Ideas: (design
idea added 3/03) |
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Digital potentiometer Programs & stabilizes Voltage Reference - 05/30/02 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. You can use a digital potentiometer in two ways in an analog circuit.
You can use it as a two-terminal variable resistance, or rheostat, or as a
three-terminal resistive divider.....(design idea added 10/03) |
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Digital potentiometers enable Programmable Biquadratic filter - 07/22/04 EDN-Design
Ideas: Of the many types of analog filters available to designers, few allow easy
adjustments of the filter parameters. The biquadratic, or biquad, filter is an
exception, however. You can change that filter's corner frequency (ω0), Q, and gain
(H)….....(design idea added 11/05) |
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Digital Potentiometers: Frequently Asked Questions - Maxim Application Notes / 593
/ Nov-05 (app note added 5/08) |
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Digital Stereo Potentiometer - in PDF format, text in Finnish (added 1/03) |
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Digital volume control
(Aaron Cake) - based on DS1669 Digital Pot IC (added 5/02) |
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Digital Volume Control has Log Taper - 04/11/02 EDN-Design Ideas: Digital
potentiometers provide a compact and convenient way to attenuate audio-amplifier
signals. However, most such potentiometers suffer from at least one flaw: a
nonlogarithmic step increment. To avoid this problem, a user must usually step the
potentiometer in a nonlinear sequence to simulate a logarithmic taper.....(design idea
added 1/05) |
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Digitally controlled potentiometer sets cutoff frequency - 06/10/99 EDN-Design
Ideas:.....(design idea added 2/06) |
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Digitally Programmable Gain & Attenuation Amplifier Design - AN-137 Analog Devices
Application Notes (app note added 2/06) |
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DS1669 Digital Potentiometer - The DS1669 Dallastat™ is a single digital rheostat
or potentiometer with access to all three potentiometer terminals. The potentiometer
has 64 wiper positions with equal or linear resistive step sizes. This device has both
positive and negative 8V (max) supply inputs for maximum wiper outputs .....(circuit
added 07/07/07) |
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Potentiometers: #'s - A
B - D E
- L M - Q
R - Z |
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