A Cost-Competitive Twin Programmable Microcontroller-based Digital Potentiometer for Low Range Resistance Application in Automotive Testing

2018 ◽  
Author(s):  
Wan Shahmisufi Wan Jamaludin ◽  
Muhammad Nasiruddin Mahyuddin ◽  
Noor Hafizi Hanafi ◽  
Dahaman Ishak
Keyword(s):  
Digital Potentiometer

scholarly journals Memristors as Candidates for Replacing Digital Potentiometers in Electric Circuits

Electronics ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 181
Author(s):  
Ivo Marković ◽  
Milka Potrebić ◽  
Dejan Tošić
Keyword(s):  
Phase Shifter ◽  
Voltage Divider ◽  
Frequency Characteristics ◽  
Phase Shifters ◽  
Pass Filter ◽  
Electric Circuits ◽  
Digital Potentiometer ◽  
Memristive Circuits ◽  
Parasitic Effects ◽  
Additional Level

Digital potentiometers are substantial components for the design of many mixed-signal electronic circuits and systems. Their capability to program resistance value almost instantly provides hardware designers an additional level of freedom. Unfortunately, this feature is limited to DC and lower frequencies, due to parasitic effects. Nowadays, memristors as continuously tunable resistors are becoming candidates for potentiometer successors. Memristors are two-terminal non-volatile devices which have less significant parasitic effects and a wide resistance range. The memristance value can be changed on the fly. Using nanotechnology, memristor implementation has a nanoscale footprint with nanosecond transition between resistive states. In this paper, we present a comparison between the frequency characteristics of digital potentiometers and the only commercially available memristors. Memristor parasitic effects dominate at higher frequencies which extends the bandwidth. In order to present the advantages of memristive circuits, we have analyzed and implemented tunable circuits such as a voltage divider, an inverting amplifier, a high-pass filter, and a phase shifter. A commercially available memristor by KnowM Inc. is used for this purpose. Experimental results obtained by the measurements verify that a memristor has equal or better characteristics than a digital potentiometer. Memristive realizations of voltage dividers and inverting amplifiers have a wider bandwidth, while filters and phase shifters with a memristor have almost identical frequency characteristics as the corresponding realizations with a digital potentiometer.

Rapid Determination of Fat in Meat and Meat Products by Foss-let Solvent Extraction and Density Measurement

1975 ◽  
Vol 58 (6) ◽  
pp. 1182-1187
Author(s):  
Julio D Pettinati ◽  
Clifton E Swift
Keyword(s):  
Rapid Determination ◽  
Density Measurement ◽  
Meat Products ◽  
Fat Content ◽  
Digital Potentiometer ◽  
Sources Of Variation ◽  
Aoac Method ◽  
Meat Samples ◽  
Meat Type

Abstract The commercially available Foss-let fat analyzer was evaluated for the determination of fat in meat and meat products by comparison with AOAC method 24.005(a). With the Foss-let procedure, mechanical and instrumental equipment is used to determine fat in 7–10 min. A sample is extracted with tetrachloroethylene in a mechanical orbital shaker for 2 min and the specific gravity of the extract is measured in a magnetic float cell controlled by a digital potentiometer. During extraction, anhydrous calcium sulfate absorbs moisture droplets originating from the sample. The variations of comparative determinations on 67 meat samples containing 1.1–95.4% fat and 17 frankfurter samples containing 17.3–37.3% fat were analyzed statistically by grouping the data according to meat type (beef or pork) or frankfurters and into 6 ranges of fat content, and by treating the entire set of data. Error analysis of the differences and standard deviation of each grouping of paired determinations by the Fosslet and AOAC methods indicated that meat type and fat content >7.5% were not significant (P = 0.05) sources of variation as determined by t-tests on the statistics from the blocks of data. Determinations on samples containing ≤7.5% fat were consistently low and an additive correction of 0.25% was indicated. From the overall results, the accuracy and precision of the method were characterized as follows: the mean Foss-let method determination was high by 0.08% fat relative to that by the AOAC method; repeatability of ± 0.31% fat between duplicate determinations compared favorably with ±0.38% obtained with the AOAC method; and precision between paired determinations by the 2 methods was ±0.44%. Both a t-test for significance (P = 0.05) and the linear regression of the 84 comparative determinations indicated that the Foss-let method was equivalent to the AOAC method for determining fat.

scholarly journals Develop and implementation of PC based controller for humanoid robot using digital potentiometer

2019 ◽  
Vol 15 (1) ◽  
pp. 104
Author(s):  
Hairol Nizam Mohd Shah ◽  
Mohd Fairus Abdollah ◽  
Zalina Kamis ◽  
Mohd Shahrieel Mohd Aras ◽  
Mohd Shahrieel Mohd Aras ◽  
...  
Keyword(s):  
User Interface ◽  
Remote Control ◽  
Humanoid Robot ◽  
Serial Communication ◽  
Circuit Board ◽  
Digital Potentiometer ◽  
Current Value ◽  
Wide Usage

This paper introduced to develop and implementation of PC based controller for humanoid robot using digital potentiometer. The main objective in this paper is to develop and implement the joystick controller by using a digital potentiometer circuit board that be able to control the humanoid robot movement. The Arduino board and digital potentiometer will be integrated by connecting both pins in between wiper, W pin and ground, GND to the DB9 pins of remote control platform, which is TX and RX pins respectively. Humanoid robot as known as TOMY i-SOBOT is used as a preferred model due to wide usage in many applications. A digital potentiometer will be transmitted the voltage and current value depend on the digital level through serial communication to give the instruction for humanoid robot movement. The humanoid movement based on Guided User Interface (GUI) where the user give a commands by pressing the button on the GUI such as turn left, right, forward, and reverse. The results show that the humanoid movement able to control based on the voltage and current in a digital potentiometers value.

scholarly journals Toward a Microfluidic Implementation of a Digital Potentiometer

2018 ◽  
Author(s):  
Erik A. Zavrel ◽  
Xiling Shen
Keyword(s):  
Life Science ◽  
Digital Potentiometer

Herein, we report on the motivation for, design of, and progress toward a microfluidic implementation of a digital potentiometer for various physical and life science applications.

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