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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Fixed-increment adjustment of constant-current source
I am using the LM317 as a constant-current source according to Figure 22 on the ON-Semi datasheet here.
I would like to control the current in fixed increments rather than the continuous provided by ...
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Controlling Brushless Motor ESC Remotely
I currently have this https://a.co/d/hen7RIb brushless motor ESC from Amazon. I need this to accept a different input than the potentiometer. Right now for remote control we have this ESC connected to ...
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What is this component? Car AC control unit ring encoder [closed]
So my mode door knob (the one to direct air to windshield, feet, etc.) has gone bad, it always blows air to the windshield. I tore down the dashboard and got to the problem, the potentiometer-like ...
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Trying to find or match an Old Allen Bradley R450 J-Type potentiometer [closed]
I'm looking for any information on how to replace or repair this potentiometer. It's an AB R450 J-type potentiometer on a Brent ceramic wheel from the early 70's, I believe. I cannot find anything ...
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ATmega328P ADC 4-digit 7-seg display
I've been trying to program an ADC with my ATmega328P, coding it in C++, it should show a 0 to 1023 value number, but it keeps showing random numbers when I move the potentiometer: 0001, 0039, 0014, ...
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Potentiometer part number to Identify (pot, 1k, 3/8" single turn) [closed]
I want to know what the part number of this specific potentiometer, 1k, 3/8" single turn there is code written on the surface of the body says T20YM and 102C417.
I would like to know the part ...
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Controlling a DC motor with a potentiometer
I am trying to make a circuit with:
USB to open (5V)
5V DC motor
50 ohm potentiometer
I've forgotten a lot of the basics, and I just want to verify that this would work. I was going to connect the ...
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Making adjustments to the potentiometers on a Electronmen EM - 285 DC - motor speed regulator
Does anyone any experience with installing and operating a Electromen EM - 285 DC (12/24V 20A) motor speed regulator made in Finland.
Having read through the leaflet that came with the unit and wired ...
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Why are servo potentiometers in the 5k range?
I've looked around a bit and it seems that servo potentiometers are in the ~5kOhm range. Why 5k?
Ultimately it's just a linear voltage divider, so:
Aside from idle power consumption, does the value ...
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Can I replace this broken potentiometer with resistors?
I have a 100-watt DC DC boost converter 10-32V To 12-97V like this one.
The micro potentiometer broke. I'd like to wire in resistors (since I have some.) I think I can do this because the output ...
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Gas Emulation Question
I am EXTREMELY new to circuit/circuit board diagrams. I am trying to design a Gas Detector emulator that has dip switches for addressing each board, a low voltage control with low power led, and a ...
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How to handle PCB design rule check when using a potentiometer with only two pins as a rheostat?
As a part of a simple PCB, I want to use a potentiometer as a rheostat which will vary the feedback resistance of a Schmitt-trigger as follows:
I use KiCad and if I leave pin 3 open as shown above, I ...
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Switching potentiometers with shift register and transistors / darlington array in microcontroller-based music sequencer
First some background on my project:
I am working on an electronic music sequencer for use in my modular system using an RP2040 microprocessor. There are 16 steps in the sequence. The RP2040 cycles ...
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Using a potentiometer to adjust a capacitor voltage
Update:
The purpose of the circuit is to cause a capacitor's voltage to be set to the voltage on the wiper of a potentiometer that is connected from battery to ground.
I.e. when the potentiometer is ...
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Footprint for potentiometer with support pins
I am trying to add this:
potentiometer to my design. As you can see, it also has two pins in order to support it structurally. This is the datasheet if anyone is interested:
https://www.tme.eu/...
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How to work out what need to build LED dimmer
I am trying to finish the LED dimmer project using white LEDs 5054 DC12V (240 LEDs) on aluminum plate and diffusor plate. I have burnt out couple of potentiometer and resistors trying to control the ...
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Does this component exist? On/off switch in the shape of a rotary pot? [closed]
I've looked for this, it probably doesn't exist.
I'd like to acquire a latching on/off switch in the physical form of a common 3-leg potentiometer. Rotate the knob one way to turn the switch off (...
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SMD Potentiometers, with long and standing wiper
I am trying to find a component, but I am not sure if such a component exists.
I want the potentiometer with the standing wiper, like this:
However, all the potentiometers that I find of this type (...
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Potentiometers for vocal mics
I want to mute the output of a wired headset mic so that when the power pack is turned on it doesn’t make a pop through the PA. I bought this little passive volume control, but with the volume fully ...
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What is the best practice to translate variable resistor 500k to infinity to logic levels?
I have a custom sensor that gives me resistance in the range of 500 kΩ to infinity, I want the 500 kΩ - 1.5 MΩ values to be perceive as a High input in my STM32 controller.
Assuming Vin = 3 V and the ...
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DC coupled common emitter amplifier
I am designing a DC supply for a motor driver. The voltage of the supply determines the motor speed (voltage goes up, speed goes up). My plan is to vary the supply voltage to keep the motor rotation ...
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What kind of bridge circuit is this?
While I was analyzing the old Tektronix' sampling oscilloscope, I found the above circuit that is adjusting the bias voltage of the sampling gate diodes. I understand its purpose, but could not ...
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How to select correct resistor to protect potentiometer?
I'm planning to use potentiometer in a circuit. I know when potentiometer reaching low resistance, big current/power could burn potentiometer. How could I select correct resistor to protect my ...
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Using a gear-styled wiper in a potentiometer
I want to use a custom Gear styled wiper in a regular potentiometer.
I found an old product that uses this. It has some weird plastic contraption in order to achieve this.
I supply some pictures for ...
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What properties should I look for to find a balance potentiometer for a vintage hi-fi?
I am looking for a replacement balance (left/right - center) volume potentiometer for a vintage hi-fi. The amp is a Pioneer SA-506. Here is a photo of the pot:
I cannot find anything online in the UK....
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How to put the LM5143A-Q1 IC in voltage adjustment mode? (From Datasheet)
I'm trying to make my first voltage regulator circuit using the LM5143A-Q1
Buck IC. The datasheet does include examples and all the values required to get the 3.3/5V fixed output, but it barely has ...
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JFET or MOSFET for controlling the speed of a compressor (via resistance modulation)
I've recently purchased a 12v compressor with a control unit attached (QDZH35G - usually meant for refrigerators or A/C units, but this is for a DIY project). The speed of the compressor can be ...
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How can you tighten a potentiometer? [closed]
I have an arcade cabinet with a broken volume control daughterboard. Soldered in is a potentiometer which turns clockwise/anticlockwise fine, but also lifts 1mm off the board. It works as intended ...
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How do I fix the output of my analog sound equalizer?
I'm new to electronics and I'm trying to build an analog sound equalizer with an TL071 as an amplifier. I have three different circuits for three different ranges (low frequencies, high frequencies ...
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Obsolete potentiometer
I am not a electrical engineer I am a rancher. I came across this site while searching for someone that could possibly repair a potentiometer. My problem is this.I have a cat 303 excavator ...
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Is there a replacement or even upgrade possible for my worn out SM Audio Pro Passive Volume Controller?
I own a passive audio volume controller for my studio speakers. It is lightweight, small footprint and did do a great job until recently. Now the potentiometer seems to be completely worn out, there ...
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KiCad footprint for 5 mm three pin potentiometer [closed]
I want to use a standard three pin through-hole potentiometer in my design.
The pins have a distance of 5 mm between them.
KiCad has literally hundreds of footprints for through-hole potentiometers, ...
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Voltage fluctuations at potentiometer
I am using the following circuit which receives a DC voltage from a transformed and filter capacitors. I am getting a problem of the voltage changes.
Here without load the potentiometer input coming ...
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Footprint assignments in KiCad
Does anyone know what footprint assignment for the potentiometer WH148 style in KiCad? There were a lot of footprints but I don't know which one is the same as the WH148 style.
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Are potentionmeter pinouts universal?
Right now, I am using all the pins of a three pin potentiometer, in order to feed a signal into a transistor for amplification.
The leftmost pin is GND, the middle pin is the signal and the rightmost ...
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Replacing a linear softpot (ribbon sensor) with a regular potentiometer
I'm a beginner with electronics. I'm trying to replace a softpot on a cheap synthesizer with a regular potentiometer. As far as I can tell this component (pictured below) behaves just like a 10K pot; ...
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Trimmer Pot - Default Setting from Factory
I have been using a trimmer pot (Bourns 3224W-1-104 100k 3224W 4mm 11-turn SMD Trimmer Pot) in a design. The pot does not get adjusted in production and ships with the pot set as shipped from the ...
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Shelly Uni IDC with a potentiometer as a garage door open sensor (percentage) - voltage regulator with low current
first of all, I'd like to mention that I'm not an electronic engineer (done some ESP8266 and Raspberry solutions, but mostly by using ready-made components and shields), so if some info is missing or ...
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What is the rotatable switch used in smartwatches called?
Some smartwatches such as an apple watch and Samsung Gear use a rotatable switch for navigation that make a clicking sound when turned. The companies call it "crown" (some details - pdf). I'...
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How to connect potentiometer to an Arduino board and a motor using a large power source at the same time [closed]
I want to use a PID system to control a potentiometer with a motor. I'm going to run the system on an Arduino so I need to connect my potentiometer to the Arduino so it can take whatever data it needs ...
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Using a motor to provide resistance for string potentiometer
I have a string potentiometer that I want to attach to a handle. As an example, if the user does a bicep curl, the string pot will measure speed of the movement. The string pot I have, I assume, has a ...
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How to describe, in a schematic, grounding to the base/body of a potentiometer?
I am working on updating a guitar project I did many, many years ago. I mean, I could just do a 'symbolic' drawing of the wiring itself, but since I have more experience now, for my records I'd just ...
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What is achieved by wiring the volume and tone potentiometers differently in these two diagarams for a Telecaster with a 4-way 2-pole lever switch?
I have a wiring diagram by Stewart-MacDonald (StewMac) for utilizing a 4-way 2-pole lever switch (for selecting between single-coil pickups) that wires the volume and tone potentiometers differently ...
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Potentiometer tension equation computation
I am struggling to understand how to compute a specific, simple, equation relative to potentiometers. Given the image below:
I do not understand how to get to the second equation, i.e., the case in ...
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I am rewiring my old guitar and I need help with the potentiometers
Is it possible to convert a 250 kΩ potentiometer to 500 kΩ or a 500 kΩ stereo potentiometer to mono?
I am finding it difficult to locate a 500 kΩ mono potentiometer.
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Need to create a circuit that has two outputs, one output has half the voltage of the first output
I have two systems I am trying to get to work together.
One system has two inputs, input 1 takes an output from a potentiometer with a voltage ranging from 0.9 V - 4.5 V using a supply reference ...
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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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