Questions tagged [potentiometer]
Mechanically adjustable variable resistor with three legs. It is used as a voltage divider. (It is not a meter at all, but got the name from its historical ancestor, which was a meter.)
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Op-amp overheating - Generating two variable voltages
I have a stereo potentiometer (10 kΩ) and a +5 VDC voltage (regulated by a 7805) with which I am trying to generate two "inverse" voltages, so at the same time one channel being high ...
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How can I connect multiple potentiometers (~20) to my Arduino without having to have 20 analogue pins?
I'm trying to build a MIDI controller and I'm looking for a clever way of using 20 potentiometers without having to have 20 analogue ports on the Arduino. So far all the functionality I need is for ...
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Potentiometer smoothing 1µF capacitor placement
I am working between an Arduino and an external machine. I am using b10k potentiometers.
What's the correct placement? A, B, C or does it really matter?
There will be a ground plane in place so I am ...
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Reading potentiometer value in high voltage circuit externally
I want to be able to read the value of a potentiometer in an existing high-voltage circuit externally with a microcontroller, but am concerned how the existing circuit would affect the Arduino and ...
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Washing potentiometers with de-ionized water, or with distilled water?
I am aware water conducts electricity because of its impurities.
However I am not sure if distilled water is pure enough to be safe to use to wash the potentiometers(and electronic boards in general), ...
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What is the circuit symbol for a triple gang potentiometer?
What is the circuit symbol for a triple gang potentiometer?
I've found one possibility for dual gang potentiometers:
(Image source: Components101 - Different Types Of Potentiometers And How To Use ...
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Why are there resistors after the potentiometers in a passive audio matrix mixer?
I'm going to build a passive matrix mixer using the information on this site and this schematic:
This is the first time I have built any circuits, so I've been doing some research trying to work out ...
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How to troubleshoot a potentiometer problem
I went over my league and started the Adafruit's PiGrrl Zero project, and then when succeeded, wanted to implement the audio amplifier add-on suggestions.
Anyways, this morning, the audio amp's ...
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Circuit with resistance equal to input resistance
I want to use a digital potentiometer, however, the digital potentiometer has a power limit, which means I can't apply the voltage for my application.
I am looking for a circuit which functions as an &...
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Sign of failure of potentiometer
Is it a sign of failure of a potentiometer when it doesn't have a fixed ohm value (the MM reading keeps changing) at any turn position, and what must be done to fix this particular symptom?
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How can I connect a potentiometer to the solenoid?
I have done a bit of research but cannot find anything hard and fast describing what I am trying to do.
I have a solenoid in the steering rack of my racing car. This solenoid is controlled by the ECU ...
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Paradox: potentiometer short circuits between tracks which never touch
I can solder and use basic features of multimeter so excuse my ignorance.
This is driving me crazy, this a potentiometer from speakers which lost left channel sound. I disconnected the volume control (...
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Is it possible to detect linear motion of a billiard cue using a crude potentiometer?
I’m working on a project that simulates the motion of a billiard cue. I’m thinking of using an Arduino Uno for communication and an MPU6050 module for detecting angular rotation.
For detecting linear ...
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PWM controller and analog circuits
I’m trying to fix an item controlled by analog circuitry. No luck on that. I can get a motor to run but can not figure out the speed control circuit. It uses NPN and PNP transistors with variable ...
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Using potentiometer to light three different LEDs (Multisim)
I want to make a circuit that connects a potentiometer to three different LEDs (green, blue, red.) This circuit would simulate the wind speed sensor. If the potentiometer is high (V is high, ...
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Ghosting in LED Matrix
Some LEDs light up even if they are not supposed to. The LEDS should spell ECE on the right extreme of the pot, while 3-1 in the left extreme of the pot. So there are two scenarios, either show ECE or ...
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LED Matrix design in Multisim does not work in Tinkercad
We have this design in multisim and it works fine, the intended LEDs works fine in mutisim but when we used tinkercad to simulate, it does not work the same way. It is supposed to spell ECE (right ...
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24 pin potentiometer/rotary encoder identification
I am building my first button box. I got some electronic parts that were going to be scrapped to take some switches off.
I found this potentiometer or rotary encoder on one of them but I can't ...
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Compensate potentiometer wiper resistance with negative resistance (LM358)
I'm trying to cancel wiper resistance of a 10 kΩ DiGiPot that controls output voltage of a switching power supply. I'm using MCP4131-103 that has 120 Ω wiper resistance @0% pot position. This wiper ...
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How does changing the volume pot value affect output power?
The diagram I'm following for a basic TDA7297 stereo audio amplifier specifies 50 kΩ for its volume control, but I only have 10 kΩ and 100 kΩ dual pots.
If I use 100 kΩ I know I could halve it to 50 ...
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Replacing a potentiometer with a digital one: Appropriate Pins
I have this control panel with a 3-pin potentiometer that extrudes from the front as a twistable adjustment. It would be very cool to swap it out with a digital one therefore facilitating the same ...
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Importance of ADC Speed for Accelerator Pedal Position Sensor (APPS)
We are building a electric vehicle and need an accelerator pedal position system.
We have the circuit designed as shown below.
When simulating our circuit, the ADC speed of the Arduino Uno seemed slow....
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Adjustable Voltage Regulator Causing Fixed Regulator to Change Voltage
I have a center tap transformer that supplies 28VAC to this board. The center tap is connected to my ground plane. When no potentiometer is connected all fixed regulators work as expected, but once ...
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To control the crossfade between 2 identical PWM LED dimmer modules, can a single dual gang potentiometer replace the 2 separate rotary controls?
Can the individual dimmer (rotary) controls of 2 identical prefab PWM LED light dimmer units be removed and replaced with a single dual gang potentiometer to crossfade between them for the blending of ...
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LED brightness control with a potentiometer [duplicate]
Can we use these potentiometers to control LED brightness? 150mA current at 12 volts, the LEDs are 5mm in series and parallel, keeping circuit simplicity and avoiding CC circuit. Did anyone use ...
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How to use single-pole rotary switch to mimic potentiometer and evenly light individual LEDs progressing from 1 to X then back to 1
How can I, by analog means, use a single-pole multi-position rotary switch to both mimic a 100 kΩ logarithmic pot AND progressively / evenly light a circle of LED position indicators from 1 to X and ...
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How to replace potentiometer with MCP4725 with separate 5v lines
I'm not an electrical engineer, so maybe my concerns are not valid here:
I want to replace a physical potentiometer on a high voltage power supply, which takes 0-5v as the potentiometer input. I have ...
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Is there a way to "indirectly" measure the position of a variable capacitor?
I am modifying the insides of a vintage radio. I wish to avoid damaging it or changing it as much as practical.
Here is the insides of the radio in question:
A primary goal is to measure the position ...
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How could I replace a physical three wire potentiometer with Raspberry Pi (or Arduino) controlled?
I have a physical three wire potentiometer on a hardware that I did not create. I want to replace the potentiometer with a Raspberry Pi based control. How could I replace the 3 wire potentiometer of ...
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Arduino - Multiple values changing when only one analogue input in being changed
I am building a simple volume control surface using an Arduino plus a few potentiometers (slide and knob). I am following the guide found here.
Essentially this is the guide for wiring everything up:
...
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How to have a switch sensitive to a specific voltage ? (NO if v < v0)
I have a 0-10v tension from a potentiometer generated current (1), and I would like to use something like a relay to switch on/off a ...
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Adjustable low-pass filter with logarithmic cut-off control via potentiometer
Let's consider this simple RC low-pass filter:
We can make the cut-off frequency adjustable by replacing \$R\$ with a potentiometer. But then the cut-off frequency \$f\$ is proportional to \$\frac{1}{...
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Finite resolution (discrete step) mechanical potentiometer
Are there mechanical potentiometers with discrete lockable stepping instead of the usual gradually variable adjustment? I need a potentiometer that would have a guarantee to stay in selected discrete ...
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Identifying potentiometer
I have an old fan which is controlled by a switched potentiometer (see photo). Unfortunately it's become faulty so I need to replace it. It has five pins - I gather two of them are for the switching ...
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Do I need to worry about current when using a potentiometer? [closed]
I have a 12 V, 2 A device. I need to be able to change the voltage for this device on the fly to up to 13.5 V. I am not an electrical engineer so please bear with me.
From what I understand each ...
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Can a 10 kΩ potentiometer replace a 50 kΩ potentiometer on a volume control board?
I have an Onkyo A-9010 amplifier, which has a faulty potentiometer on the volume control board.
Service Manual
It's a 50 kΩ, linear (not sure) stereo, motor-driven potentiometer. In Hungary, where I ...
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Does this circuit have any problems?
I built this circuit for removing DC from a signal, amplifying AC, and offset it via an op-amp for sending to an ADC.
AC signal amplitude is about 0 ~ 20 mV or 0 ~ 1 V.
The reason the signal ranges ...
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What is the name of those transparent soft plastic cases around a potentiometer's hull?
I can't find the name of those transparent soft plastic cases that one can put around a potentiometer's hull to protect them from short-circuits. Anyone?
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Time delay of LED dimmer circuit problem
I made a LED flip flop circuit using NPN transistor, it works pretty fine.
But my problem now is I don't know how to control the on and off time delay for the LEDs using potentiometer.
I tried putting ...
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MOSFET overheating and voltage drop
I've searched on the network for days but couldn't find a solution to my problem I hope you can help me.
I want to create a DC motor speed regulator using IRFZ46N as a power MOSFET and a 10k ...
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Simulate a thermistor to fake temperature readings in heater
What I want to do
Control an old heater to avoid running during hours where kWh is expensive. Bonus: Getting a more even inside temperature.
How I plan to achieve this
I know there is a product where ...
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Dual potentiometer the solution?
I'm working on retrofitting '14 Lincoln MKS 14 way power heated/cooled seats into a 2002 4Runner. I have all motors & lumbar wired. Had a Eureka moment on the TED and got it working!
3 position on/...
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Relationship between volume control position and signal voltage
Of course, it depends a lot on the taper of the volume control.
I need to know how turning the volume knob affects signal voltage.
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How do I connect potentiometers to a power supply so that I can use one to vary current and the other to vary voltage
I want to connect two potentiometers in a way that will allow me use one to vary the output voltage and the other to vary the output current, I'm getting confused about connecting this.
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Using potentiometer to control speed and direction of electric motor rotations
I want to create a circuit that will allow me to conveniently control a 3V electric motor - specifically I want to be able to control how fast it rotates and in which direction.
From usability ...
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What size pot to control the volume of a single small 4" 16 ohm speaker that's plugged into a headphone jack of my Soundblaster card in my PC?
I have a 4" 16 ohm speaker in the overhead of my flight simulator cockpit. It will be plugged into a headphone splitter that goes to my SoundBlaster board in my PC. I would like to use this ...
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Potentiometer rated power and 16 LEDs
Using 5 mm through-hole LEDs, 4 in series and 4 in parallel, 3.3 V, 25 mA, 16 in total. Battery voltage is 12.9 V (car lead acid).
I want to control brightness using a carbon potentiometer 15 mm dia, ...
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Limiting potentiometer to 10% and 90%
I am new to using potentiometers and I just wanted to see if this is possible,
I know you can use resisters to alter the value of the potentiometer and starting values and so forth.
I have a 5 V ...
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Smoothing potentiometer output
I am building a paddle controller for my Commodore C64. Basically all you need is a 470k (or 500k) potentiometer connected to two of the joystick wires. Internally, the C64 has capacitors through ...
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Using a potentiometer to shift between negative outputs from either -2V and 2V
The question that I am wanting to ask is that I start off with either 5V or -5V which is reduced to -2V or 2V for my output for the potentiometer. My potentiometer has a 5k resistance and I am trying ...
