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Questions tagged [potentiometer]

mechanically-adjustable special-type variable resistor with 3 legs and it is used as a potential-divider. (It is not a meter at-all, but got the name from its historical ancestor which was a meter.)

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26 views

Resistance/Voltage relation in Rheostat?

According to "How Computers Work" (Tenth Edition) by Ron White, he features a graphic of a potentiometer with three terminals on the bottom with the one on the left being for current flowing in and ...
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11 views

Low range of voltage from a potentiometer connected to Toolstick card Silicon Labs

I have a linear potentiometer of 10k ohms which I connected to a toolstick Card (a microcontroller distributed by Silicon Labs). I used the ADC of the card to convert the analog voltage to digital ...
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21 views

How to wire 4 pin slide potentiometer? [duplicate]

I was wondering how to wire a 4 pin slide potentiometer. I found this previous question but was wondering what the numbers actually meant: Potentiometer with four pins?.
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41 views

potentiometer like rotation angle sensor

I have a set of flight simulator gauges which use a motor to move various indicators. The rotary position of the indicator is measured with a potentiometer like device, but it has 5 terminals instead ...
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52 views

Digital potentiometer - different voltage

What would be the "correct" way to replace an analogue potentiometer with a microcontroller controlled digitalpotentiometer, when the require voltage is higher than what the chip can support? In more ...
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2answers
57 views

electronic dc voltage regulator controlled by arduino

i am new to the electronic things so please help me figure out a solution. I am looking for a way to control voltage by Arduino of my 60volt 10 amp dc power supply i.e to get any voltage from 0 to 60 ...
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24 views

Current Controlled Potentiometer

The core problem I am having is that I need to be able to control a DC to DC voltage regulator based on input from a 4 to 20 mA signal. The end goal is to have the output voltage of this regulator be ...
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4answers
120 views

Potentiometer warm up issue

I have a microcentrifuge which has a DC motor rated 24V, 10 Watt and 7000 rpm. I have attached one 5W, 500 Ohm potentiometer with it to control the speed and it works fine without heating up. ...
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Potentiometer like component

Okay you might get this a lot around here; I'm trying to figure out the inner workings of this specific potentiometer like component. I want to get my hands on the datasheet or a similar components ...
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118 views

Steps to replace a 10k ohm pot with a 10 ohm pot

I was about to build an all-in-one board for a retropie computer inside a gameboy advance sp shell, when I found this board that already was made and shared by someone else. I have a different ...
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1answer
29 views

Potentiometer/trimpot range 503 vs 103 with a resistor in series

Small intro: I'm adapting this NE555+CD4017 module to fit into a nice little box and I am switching out the plastic trimpot that came with the package for a metal one that can fit through wood. The ...
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159 views

Potentiometer overheating

I have a 10 kilohm potentiometer being powered by a twelve volt battery. After I run the circuit, the potentiometer begins to overheat. I thought that a 10 kilohm potentiometer could take 12 volts. ...
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40 views

How to add a Linear and Logarithmic Potentiometer in Circuit Wizard

I'm new in this kind of thing and I'm using Circuit Wizard (Circuit Simulation Software). I was trying to simulate an overdrive pedal circuit (https://www.instructables.com/id/Overdrive-Pedal/) in ...
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47 views

Does potentiometer accuracy change with degree of movement?

I want to use a conductive plastic potentiometer for my actuator application where movement is +/- 40 degrees. As in datasheet, the potentiometer linearity is given as +/-0.2 % which I think is for ...
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62 views

Equivalent replacement for a centered 4pin potentiometer? [duplicate]

I need some help in understanding the pots pictured above. How does this 4pin pot work? What is the function of the 4th pin? Would this be the correct replacement if I want to replace the centered ...
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2answers
87 views

How do I connect a four way key in a potentiometer?

I asked this question in Physics stack exchange and had an answer, but I couldn't understand it well. A comment said this stack exchange was a better fit for the question. Question: How do I connect ...
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1answer
51 views

How to find current through series of potentiometers, and if it is safe for potentiometers? (Arduino)

I have 9 potentiometer with the specs: 10k Ohms and 0.5W I'm using an Arduino Mega, and using it's 5V port output to power these potentiometers in series, and I saw online that the max current this ...
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38 views

Replace potentiometer for Kemo M012 Power Control

The potentiometer of my (Kemo M012 Power Control) is mechanically broken and I would like to replace it. However, I am unsure whether the replacement needs to meet any specific characteristics or if ...
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1answer
39 views

Potentiometer value goes up and then down again

I have 16 potentiometers of the same value (with some tolerance) like this. The wipers go to muxers and then to ADC pins of a micro-controller. On the breadboard this worked fine (using only a few ...
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2answers
84 views

Can a 3W pot be connected to a 5W LED baton? [closed]

Situation: I got a LED baton and the brightness was higher than required. I added a regular 22k pot in series to it, and achieved lower brightness, but within a few seconds, the pot was burnt. I ...
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2answers
89 views

What is the second resistor for in this potentiometer reference circuit?

In the reference circuit from this datasheet for a potentiometer, what is RL for? Why did they pick 100 x R? Bonus question, how do I pick a good value for C?
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35 views

How to proportion hydraulic flow using potentiometer and MOSFET

I am working on solving a problem that we generally deal with in a mechanical fashion. We have a hydraulic system with a dumb controller and a dumb valve stack. We can change the valve stack solenoids ...
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2answers
87 views

Mono to Stereo Pan Knob

I am trying to make a small box to take the mono audio output form my analog synth and run it through a panning knob so I can control where in the stereo mix the mono signal is placed. The goal is to ...
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1answer
83 views

Potentiometer min and max value

I purchased several of these to drive high power LEDs on a custom project : https://www.amazon.com/gp/product/B019W4C5IE/ref=ppx_od_dt_b_asin_title_o00_s00?ie=UTF8&psc=1 These LEDs are to be ...
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24 views

Potentiometer Selection for Fan Speed Control [duplicate]

I am making a stir plate out of an old PC fan, variable resistor, and DC power supply from this tutorial. I have two power supply's to choose from, their outputs are: PS1 = 12Vdc, 2A PS2 = 12Vdc, ...
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83 views

PC fan speed control

I am making a stir plate out of an old PC fan, variable resistor, and DC power supply from this tutorial. I have two power supply's to choose from, their outputs are: PS1 = 12Vdc, 2A PS2 = 12Vdc, ...
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1answer
87 views

How to choose the right potentiometer for dimming a LED

I have a reading lamp from IKEA. It has a bright LED. Too bright for my taste. So I inspected it and it is composed of a DC power supply unit that outputs 7V and a maximum of 3W. The LED unit is ...
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2answers
95 views

Swapping two 500kohm pots with one MCP42010 10k ohm digital pot

What additional elements do I need in my circuit to compensate for changing a pair of manual 500k ohm pots to a pair of digital 10 ohms? I'm a beginner implementing an Atari Punk Console on Raspberry ...
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2answers
85 views

Analog Potentiometer Output to USB Serial [closed]

I‘m working on a project which has several switches and potentiometers that will be used to control parameters in software via (e.g.) MIDI and would like to know how to get the pots set up without ...
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1answer
89 views

Why not use the same size resistors for each stage in a Kevin-Varley divider?

I was thinking of building myself a Kevin-Varley divider as described for example in this article about a mini metrology lab in the March 1996 issue of Electronis Now by Conrad R. Hoffman. The normal ...
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1answer
131 views

Converting 0 - 80 V to 0 - 3.3 V range [duplicate]

I need to design a circuit so that it can convert 0 - 80 V DC to 0 - 3.3V DC. I need to give the output of a battery which is in the range of 0 - 80 V to an STM32F103 microcontroller. Since the ...
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23 views

Position sensor PS732 feinmetall

I'm redesigning a board in order to use this sensor datasheet. After reading the datasheet I have missed the potentiometer principle from third picture where this can be seen: You can see how Rp is ...
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1answer
37 views

R series by terminal A in a potentiometer

I have a question to clarify about potentiometers. Maybe the question is something silly or obvious, but I would like clarification because I'm not so sure about it and I need to be so as not to miss ...
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1answer
84 views

Potentiometer for TL081 [closed]

What kind of potentiometer (resistance) would be suitable to connect to the Offset pins on the TL081 Op amp, when used with +/-15V? And if I choose to omit the pot altogether, roughly speaking, how ...
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42 views

Automated equivalents of Potentiometers

I am currently working on a project to create an amplifier which can use both physical and digital inputs to change the resistance of a potentiometer. Is this possible without using sliders? I know ...
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1answer
59 views

Can I use X9C102 digitally controlled potentiometer on AC voltage?

I am working on a project to make a dimmer using the triac and a photocoupler, and I want to know if I can use a digital potentiometer to regulate the intensity of the light. I know it works for ...
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1answer
75 views

LM317HV power supply

I have a few questions regarding the following schematics: ![/imga] ![/imgb] Initially I was testing the first schematic to see if it works good. The result of the tests were good, the power supply ...
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1answer
53 views

Why is the potentiometer setup in this configuration in this 555 circuit

I just started learning about chips and signals using the book Make: Electronics, in one of the circuits, used to generate a pulse in Monostable mode a potentiometer is used to vary the pulse length....
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159 views

Two potentiometers to control the range limits of a voltage source

I would like to control the range of an input voltage source using two potentiometers to establish the limits of the signal. First pot determines limit 1 and second pot determines limit 2. Lets say, ...
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3answers
164 views

Potentiometer position with op-amp

I would like to measure a 10k ohms linear potentiometer (position) with A/D converter using an op-amp like this : In my case V+ will be 3,3 volts and Vout need to have maximum of 2,5 volts (which is ...
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2answers
76 views

Won't a potentiometer powered by a dc supply cause a short-circuit at lower end of the range?

Many tutorials in the Arduino or Raspberry Pi community simulate an analog sensor with a potentiometer. The potentiometer, being a passive device, is powered from the same DC power source that ...
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2answers
292 views

LED Circuit design (4 switches, 1 potentiometer)

I need to design an LED circuit that acts as a switching system. It must meet these specifications. Case 1(Press Button 1): LED 1 ON, LED 2 ON, LED 3 OFF Case 2(Press Button 2): LED 1 ON, LED 2 OFF,...
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1answer
32 views

Bourns PSL Snap-In Connector?

I want to build a small console with the Bourns PSL slide potentiometers (nothing big, it's a just-for-fun project). Unfortunately, I couldn't find the right connector on their website. The datasheet ...
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1answer
117 views

Replicating 0-5k resistance signal

I am trying to essentially replace the accelerator pedal position sensor of an electric car. It's a 0-5k potentiometer type throttle. I have tried using digital potentiometers - MCP41010, 2 in ...
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3answers
524 views

Is there a wrong way to wire a potentiometer?

I'm using Circuit Wizard to simulate a circuit and I'm trying to understand how to wire a potentiometer. While trying to learn how current flows through the pot, I found that it works in both ...
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2answers
165 views

Why is my LED flickering when it is connected to a variable resistor, and it's resistance is at the minimum value

I am doing a simple breadboard circuit, with an LED, 3.3V power supply (a microcontroller connected to the PC will be the voltage source), a potentiometer, and a Voltmeter connected across the LED. ...
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1answer
212 views

How to control LED brightness with mosfet as switch and potentiometer

I am designing a circuit to control a high current LED string. Most of the time the led string will be ON. Where should I place a potentiometer to control the brightness of the LED when it is on by ...
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1answer
138 views

Adding a volume control for headphones, driven by microcontroller

I'm currently driving a pair of earbuds with this circuit: P0 is directly connected to a 3.3V microcontroller pin, which is using PWM to drive it. I "stole" this filter circuit from the upper left ...
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2answers
74 views

LED Driver Choosing help

Newbie here, I am working on a project with a panel of 12 - 15 LEDs(std 5mm through hole LEDs) in paralell. I am currently using a 5V 1A SMPS. I used 330 Ohm resistors for current limiting. It works ...
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1answer
270 views

12V potentiometer

I am trying to control the power of a vacuum pump using a 10k potentiometer with 12v as its input source. I've tried wiring it (with the know facing you)with the first lead as ground, second one being ...