Arduino Stack Exchange
Arduino Stack Exchange

Questions tagged [potentiometer]

Electronic component forming a three-terminal resistor with a sliding contact. Acts as a variable resistor / voltage divider, manipulating the amount of current flowing through it.

Potentiometer - short form pot. Electronic component forming a three-terminal resistor with a sliding contact that acts as a variable resistor / voltage divider and lets a variable current flow through.

Potentiometers are commonly used to control electrical devices such as volume controls on audio equipment.

Wikipedia: http://en.wikipedia.org/wiki/Potentiometer

Potentiometer Explanation: http://www.electronics-tutorials.ws/io/io_2.html

Voltage Divider Tutorial: https://learn.sparkfun.com/tutorials/voltage-dividers

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How do you handle sensor drift?

I have a pair of potentiometers, on the Arduino, the output seems to drift, by one or 2 digits, back and forth. I would prefer they were read as one fixed value, without variation when their knobs are not turning. You can see in the image, the first…
j0h
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A question about resistance measurement with arduino

Lately I was asking myself about the possibility of measuring a potentiometer resistance with Arduino. My questions are: Is it possible? If it's possible, what kind of restriction does the Arduino have with the resistance value measured?
Julio Orozco
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Digital Potentiometer not fading LED

So I am trying to test what will eventually be a Arduino controlling 3 110V motors that are currently controlled by an analog pot. But more on that later. I am trying to test out using a digital pot (never have before) and am running into some…
cgaubuchon
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Arduino potentiometer example: what limits the current?

I have a question regarding potentiometer example: https://www.arduino.cc/en/Tutorial/AnalogReadSerial If I turn the potentiometer to the marginal position and have 5V at A0 (and almost zero resistance at the pot), what limits the current flowing…
Denis Kulagin
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Why can't I use just the digital pins and a ground to use a potentiometer?

First of all I am a newbie. So please excuse. After doing the first basic project, in which I had hooked up the positive of a LED to a digital input of the Arduino and the negative to the ground of the board, I am assuming that the digital pins in…
enoob
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Flexibility of SoftPot Membrane Potentiometer during the use?

Does anybody have some information or experiences with the flexibility of Spectra Symbol's SoftPot Membrane Potentiometer during the use? Is it possible to partly wind it up on a reel (or something similar) and use the remaining part dynamically…
user3704293
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How to implement multiple LED modes in a sketch with potentiometers?

My hardware is 4 potentiometers connected to Arduino Analog 0-3, the output is an RGB led driver connected to Digital outputs 9,10,11. The output channels provide access to PWM control of those pins. So idea is the color and intensity can be…
user608
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What is the lowest resistance pot that is useful with an analog input?

Background I've dabbled in electronics since my parents gave me a 150-in-1 kit in the 1970's but never had formal training. My dad repaired Honeywell mainframes so taught me to solder when I was 8. I have a decent set of equipment like irons, parts,…
Kelly S. French
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Ribbon sensor resistance slowly drops when released

I recently bought a ribbon sensor (the one displayed here), with the intention to use it as a touch-enabled music instrument. I used it correctly (so it seems), but I have two issues : When not pressed, the sensor seems to give random data, as if…
Orange Lux
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Powering potientiometer/button with a digital pin

When I read articles/tutorials about the Arduino Uno, the potentiometer and button always get power from the 5 V pin instead of from digital pins. May I know whether the two components above can be powered by digital pins? What is the situation that…
Chong Onn Keat
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What difference makes resistance of thermistors?

Following this thermistor tutorial i used 1k thermistors (and resistors) instead of 100k as in video. What difference does it make? What about 10k thermistors? Is it good idea to use 1k/10k/100k potentiometer instead of resistors to tune up…
madneon
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Why is my potentiometer giving strange reading?

I have a 10kOhm linear Potentiometer. I connected it to analog 0, as in https://www.arduino.cc/en/Tutorial/Potentiometer. The analogRead() gives a value between 0 and 1023, so I was expecting 0 if the potentiometer is at the lowest position, 1023…
Alex
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How to emulate an analog potentiometer with PWM

I have a piece of electronic that controls a motor. It takes power from AC power. Now there is a 10KOhm Potentiometer. The data sheet of this controller says that the control signal is 10Vcc. Here's the connections diagram (in Italian): I'd like to…
nkint
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Using Internal Timer Interrupt to Read Analog Sensor

I'm having difficultly using an internal timer interrupt with my Arduino Nano to properly capture a specific value from a linear potentiometer and then instantly stopping the actuator. I basically have the wiper of a linear potentiometer connected…
wickedhurricane
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Troubleshoot/Diagnose Arduino circuit

I've built the attached circuit with the following changes: I used Arduino Nano. I used 10K pot. 12V is connected to VIN pin (instead of RAW). The Arduino was connected to the PC by USB for the use of serial communication. I used 12V 4Pin fan…
Takata
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