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Potentiometer Circuits, Page 5
Potentiometers:  #'s - A      B - D      E - L      M - Q       R - Z
Last Updated on: Friday, March 12, 2010 12:07 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....

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

Recycle precision potentiometers as useful voltage sources - 06/07/07 EDN-Design Ideas: A handful of precision op amps and comparators recycles precision potentiometers as handy "volt boxes.".....(design idea added 9/08)

Resolution Enhancements of Digital Potentiometers with Multiple Devices - AN-582 Analog Devices Application Notes  (app note added 2/06)

Rotary encoder mates with Digital potentiometer - 02/06/03 EDN-Design Ideas: 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 added 1/05)

Single Switch Controls Digital Potentiometer #1 - 02/27/02 EDN-Design Ideas: 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. It implements the interface of a single DPDT, ....(design idea added 10/03)

Single Switch Controls Digital Potentiometer-Update - 09/19/02 EDN-Design Ideas: 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....

Single-Switch controls Digital Potentiometer (2/02) - 02/07/02 EDN-Design Ideas: 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 added 10/03)

Soft Start Circuit for Power Amps - Designed for (large) toroidal transformers, limit the inrush current to a sensible value.  (electronic circuit added 1/03)

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 Fig 1, which comprises an X9241 quad electrically erasable potentiometer (EEPOT)and.....(design idea added 6/06)

Stereo Potentiometer - in PDF format, text in Finnish (added 1/03)

Tack a log taper onto a Digital potentiometer - 01/20/00 EDN-Design Ideas: / idea to convert linear digital potentiometer to a logarithmic digital potentiometer.....(design idea added 5/02)

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.... ….(designed by David A. Johnson)

Using a Digital Potentiometer to Optimize a Precision Single Supply Photo Detect - Microchip Application Note Published 23-Feb-01  (app note added 2/06)

Using Digital Potentiometers to Design Low Pass Adjustable Filters - Microchip Application Note Published 24-Feb-04  (app note added 2/06)

Versatile Programmable Amplifiers using Digital Potentiometers with Nonvolatile Memory - AN-579 Analog Devices Application Notes  (app note added 2/06)

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 added 5/02)

Volume Control (Aaron Cake) - based on DS1669 Digital Pot IC (added 5/02)

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)

Where is the Wiper? - 08/08/02 EDN-Design Ideas: 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,.....(design idea added 1/05)


 
Potentiometers:  #'s - A      B - D      E - L      M - Q       R - Z
 
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