MicroController multiplexes six Digital potentiometers - 05/11/00 EDN-Design Ideas: (design idea added 2/06)

Microprocessor linear potentiometer deliver echo pulses - 05/12/05 EDN-Design Ideas: Simulate radar and sonar returns with simple circuit.....(design idea added 6/06)

Network Forms Digital to Impedance Converter - 03/14/96 EDN-Design Ideas: The circuit in Figure 1 resembles a capacitive-ladder (C-2C)D/A converter. However, it does not provide conversion from a digital code to a voltage or current, but rather converts the digital code to a capacitor value. The C-2C topology is well-suited.....(design idea added 03/03/03)

Nonvolatile Digital potentiometer gates logic signal - 09/03/07 EDN-Design Ideas: A novel use for digital potentiometers employs them as a logic gate that functions as soon as the system powers up.....(design idea added 09/08)

One Amplifier has two gain figures - 09/19/02 EDN-Design Ideas: The single-supply circuit in Figure 1 is an inverting amplifier with two outputs—one for positive output voltages, VOUT(POS), and the other for negative output voltages, VOUT(NEG). Steering diodes....

OpAmp Increases Potentiometer's Resolution - 06/05/00 EDN-Design Ideas:.....(design idea added 6/06)

Optical Module Development Platform 2.5 GBPS Transmitter with Digital Diagnostics - AN-654 Analog Devices Application Notes  (app note added 2/06)

Optimizing the Digital Potentiometer in Precision Circuits - Microchip Application Note Published 8-May-01  (app note added 2/06)

PC Based Configurable Filter uses No Digital Potentiometers - 01/23/03 EDN-Design Ideas: Modern instrumentation requires digital control signals. These signals come from a central microprocessor or, in modern context, the popular parallel or serial PC ports. In recent times, digital potentiometers have eliminated the hassles from this interface for the analog section. Designers.....(design idea added 1/05)

PIC NiCad Battery Charger - This cheap and easy to build NiCd/NiMH Battery Charger is suitable for automatically charging a wide range of batteries for many applications. Proper chargers are usually expensive and cheap chargers supplied with the original equipment often incorrectly charge the cells and dramatically shorten their life.....(added 10/05)

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)

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 potentiometer, IC1, becomes a variable set-point reference that can adapt to the long-term drift of the variable measured. The potentiometer replaces schemes involving A/D and D/A converters.....(design idea added 3/03)