Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

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.)

0
votes
1answer
31 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 ...
1
vote
0answers
45 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 ...
-5
votes
0answers
39 views

Motor Does NOT React To Input On Breadboard [on hold]

I have asked a previous question similar to this, however all I want to do for this particular circuit is for the potentiometer to adjust how fast the motor spins. When I simulate this. the motor ...
0
votes
0answers
60 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 ...
0
votes
2answers
82 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 ...
1
vote
1answer
49 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 ...
0
votes
1answer
32 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 ...
0
votes
1answer
36 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 ...
0
votes
2answers
82 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 ...
2
votes
2answers
83 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?
0
votes
2answers
34 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 ...
0
votes
2answers
50 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 ...
0
votes
1answer
64 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 ...
0
votes
0answers
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, ...
0
votes
2answers
51 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, ...
0
votes
1answer
67 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 ...
0
votes
2answers
82 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 ...
0
votes
2answers
71 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 ...
0
votes
1answer
79 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 ...
0
votes
1answer
97 views

Converting 0 - 80 V to 0 - 3.3 V range

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 ...
0
votes
0answers
20 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 ...
0
votes
1answer
35 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 ...
-1
votes
1answer
64 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 ...
0
votes
2answers
39 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 ...
0
votes
1answer
42 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 ...
0
votes
1answer
59 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 ...
0
votes
1answer
44 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....
0
votes
2answers
150 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, ...
0
votes
3answers
110 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 ...
0
votes
2answers
71 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 ...
1
vote
2answers
283 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,...
0
votes
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 ...
-1
votes
1answer
102 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 ...
2
votes
3answers
261 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 ...
1
vote
2answers
123 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. ...
0
votes
1answer
167 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 ...
2
votes
1answer
100 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 ...
0
votes
2answers
69 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 ...
0
votes
1answer
152 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 ...
0
votes
2answers
411 views

Bypassing a potentiometer

In the schematic taken from a device's service manual, if I want to bypass this volume knob and make it 100% all the time, which pins should I connect and how? I have read online, prior to seeing the ...
0
votes
1answer
77 views

Potentiometer is Heating [closed]

I have this light dimmer circuit, when I plug it into the AC, the dimmer works fine but I noticed that the heat in potentiometer is increasing, is there any workaround to fix this problem?
1
vote
1answer
54 views

Can you use a 3ph BLDC controller without a potentiometer?

I'm attempting to build a 12v fan and I'm looking at controllers to drive the 3 phases of the motor. It seems every ESC i find has a potentiometer included. I want my fan to always run at full speed ...
0
votes
1answer
124 views

Correct wiring of a variable resistor

I built the following schematic and I made a mistake. I wired the 4.7M preset reversed. This is the original schematic: And this is the schematic that I drew in Kicad: I already built the PCB but ...
0
votes
0answers
76 views

Low-Pass Filter Selection and Placement in Active Noise Cancellation

This continues in the same vein as my previous question - I'm working on an Active Noise Cancellation circuit to get rid of highway noises in my bedroom. Based off an ANC circuit pictured below, I ...
0
votes
2answers
69 views

Does anyone know the name of this specific part?

I bought these 10K linear faders some time ago and would like to use them in a current project. The only problem is that I don't know what they are so I can't order more / find the datasheet! My ...
0
votes
0answers
29 views

Nth-Light Narrow LED, Linear Potentiometer and 12VDC power supply

Is it possible to connect Nth-Light Narrow LED Flexible Strip Light (https://www.adafruit.com/product/3683) directly to a 12VDC power supply and 10K Ohm Sliding Linear Potentiometer to control the ...
0
votes
1answer
105 views

Log-Taper Variable Resistor from Linear-Taper

I'll start by saying: I've read quite a bit about how to make a "log taper potentiometer" using a resistor and linear-taper potentiometer, but I'm not sure if that will work in my case. I'm working ...
1
vote
1answer
108 views

Testing regulated power supply: 100 mA current sink

Disclaimer: I'm trying to learn about circuits on my own. I'm reading as much as possible to avoid any basic mistakes, but if there's any, please point it out and I'll investigate further in that ...
0
votes
1answer
56 views

EHX LPB1 circuit not working

I am very new to making circuits and have tried to make an EHX LPB1 circuit: When powered and plugged in, the 9v battery overheats and all I can hear in my amplifier is static noises and no output. ...
-2
votes
1answer
81 views

Potentiometers - trimming a potentiometer

I'm trying to use two trimpots to set the low and high point of a seperate 16mm pot. I have two trim pots with the outer legs in parallel to each other, and then have the middle pins going to the ...