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Potentiometer
Circuits, Page 5
Potentiometers:
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E - L M
Q RZ
Last Updated on:
Thursday, November 30, 2017 04:30 PM |
| Circuits Designed
by Dave Johnson, P.E. : |
- Ten Turn Pot
Forms Frequency Readout
Let’s say you are designing a signal generator for a test fixture. To adjust the
frequency you would like to use a ten turn pot with a nice dial mechanism attached
as a frequency display. However, a display range of 0 to 9.99 would be impractical
since there is no such frequency as 0. But since many pot dials have a display....
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Links to electronic circuits,
electronic schematics, designs for engineers, hobbyists, students & inventors:
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Read multiple
switches and a potentiometer setting with one microcontroller input pin
- 04/22/10 Issue of EDN Use a single ADC input pin to sense
pushbuttons as well as a potentiometer.… [Design Idea by Kevin Fodor,
Palatine, IL] |
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Recycle precision potentiometers as useful voltage sources -
7-Jun-07 Issue of EDN A handful of precision op Amps and comparators
recycles precision potentiometers as handy "volt boxes.". [Design Idea by
Mark Thoren, Linear Technology, Milpitas, CA] |
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Resolution Enhancements of Digital Potentiometers with Multiple Devices
- AN-582 Analog Devices Application Notes (App Note added 2/06)
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Rotary encoder mates with digital potentiometer - 6-Mar-03 Issue
of EDN In developing electronic systems, designers look for products
or ideas that may benefit from the better performance, smaller size, lower
cost, and improved reliability that an IC can offer. Toward that end, the
digital potentiometer emerged as an alternative to its mechanical
counterpart, the mechanical potentiometer. [Design Idea by Peter
Khairolomour, Analog Devices, San Jose, CA] |
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Single switch controls digital potentiometer - 19-Sep-02 Issue of EDN This
Design Idea is an evolution and simplification of another (Figure 1, Reference 1].
Replacing the three inverted-input NOR gates with their logical equivalents,
positive-input NAND gates, makes these three gate symbols consistent with the fourth,
which was drawn as a positive-input NAND gate. The 74HC132's data sheet describes the
device as a quad, two-input NAND gate with hysteresis....[Design Ideas by Jim Bach,
Delphi Delco Electronics Systems, Kokomo, IN] [Design Idea by im Bach, Delphi Delco
Electronics Systems, Kokomo, IN] |
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Single-sideband demodulator covers the HF band 10/26/00 EDN-Design Ideas ....The
circuit in Figure 1 complements a previous Design Idea (SSB modulator covers HF band
EDN , Sept 30, 1999, pg 122]. The modulator employs a phasing.… [Design Idea by Israel
Schleicher, Bakersfield, CA] |
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Single-switch controls digital potentiometer - 7-Feb-02 Issue of EDN
The control of electronic potentiometers in most today's applications comes from
controller-generated signals. However, a significant number of applications exist that
require adjustments using manual, front-panel controls. The circuit in Figure 1 uses
one IC, one switch, and 10 discrete components. [Design Idea by Chuck Wojslaw and
Gary M Craig, Catalyst Semiconductor, Sunnyvale, CA] |
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Soft Start Circuit for Power Amps - Designed for (large) toroidal
transformers, limit the inrush current to a sensible value. (electronic circuit
added 1/03) |
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Software implements Digital potentiometer - 06/08/95 EDN-Design Ideas ....In
some applications (for example, dynamic biasing of laser diodes), the use of digital
potentiometers, or trimDACs, has limitations because of resolution, accuracy, or
interface difficulties. Using the simple (but maybe not so obvious) vernier scheme
in. [Design Idea by Gray Creager, Xicor Inc, Milpitas, CA] |
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Stereo Potentiometer - in PDF format, text in Finnish (added 1/03)
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Tack a log taper onto a Digital potentiometer - 01/20/00 EDN-Design Ideas
It's sometimes convenient to have digital control of the volume level in an audio
system. The use of multiplying DACs (MDACs) is problematic because of the switching
noise of the ladder network. This noise comes from the bit switches injecting
charge into the signal when they turn on and off. Audio. [Design Idea by Hank
Zumbahlen, Analog Devices, Campbell, CA] |
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Ten Turn Pot Forms Frequency Readout - Let’s say you are designing a signal
generator for a test fixture. To adjust the frequency you would like to use a ten turn
pot with a nice dial mechanism attached as a frequency display. However, a display
range of 0 to 9.99 would be impractical since there is no such frequency as 0. But
since many pot dials have a display. [Hobby Corner . . . Circuit by Dave Johnson] |
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Using a Digital Potentiometer to Optimize a Precision Single Supply Photo Detect -
Microchip Application Note Published 23-Feb-01 (App Note added 2/06)
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Using Digital Potentiometers to Design Low Pass Adjustable Filters -
Microchip Application Note Published 24-Feb-04 (App Note added 2/06)
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Versatile Programmable Amplifiers using Digital Potentiometers with Nonvolatile Memory
- AN-579 Analog Devices Application Notes (App Note added 2/06)
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Voltage reference stabilizes current sink - 18-Feb-10 Issue of EDN Produce
a stable current for long-term component testing. [Design Idea by Suded Emmanuel,
Emmanuel’s Controls, Auckland, New Zealand] |
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Voltage Regulator goes Digital 11/24/99 EDN-Design Ideas ..../ Power consumption
and failing batteries are key issues in battery-operated applications. Features in the
new generation of series voltage regulators address these concerns. For example,
National Semiconductor's LP2951 micropower voltage regulator provides a logic-level
output signal indicating a low regulated. [Design Idea by Chuck Wojslaw, Xicor Inc,
Milpitas, CA] |
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Volume Control (Aaron Cake) - based on DS1669 Digital Pot IC (added 5/02)
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Volume Control has Log Taper - 11-Apr-02 Issue of EDN 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
by Doug Farrar, Los Altos, CA] |
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Where is the wiper? - 8-Aug-02 Issue of EDN You enjoy significant
advantages when using DPPs (digitally programmable potentiometers] with
increment/decrement serial interfaces. Programming the serial interface is simple and
fast, and you can adjust the potentiometer in real-time applications. The interface,
however, provides no information about wiper position, and this information is
important in some applications. [Design Idea by Chuck Wojslaw and Dave Gillooly,
Catalyst Semiconductor, Sunnyvale, CA] |
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Potentiometers: #'sA
B - D E
L MQ
RZ |
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