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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1answer
43 views

Bench power supply - Inconsistent voltage output

It's been 3 years since I first bought my bench power supply, a Long wei LW-K3010D. This issue has reoccured to me a couple of months ago, but it usually "went away" when the PSU was ...
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60 views

Sensors used in Compact elctronic vehicles

I am doing a group report on Compact electric vehicle and was asked to determine suitable sensors to measure the longitudinal speed and throttle pedal position of the vehicle. We did some research and ...
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Linear thumbwheel potentiometer obsolete?

I am trying to find a possibly obsolete linear thumbwheel potentiometer, like the type used in old radios. There seem to be plenty of logarithmic pots around. I can find linear but they are marked as &...
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3answers
484 views

Can't get ADC chip to work

I am connecting a 10k potentiometer to an ADC chip (LTC1273BCN) that has a 12-bit parallel output, like in the diagram at the end of the post. The 12-bits will be connected to an FPGA input bus after ...
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1answer
62 views

Is it normal for a PWM fan with a potentiometer to compensate by pulling additional current or is there additional circuitry?

I've modded a laptop fan with a potentiometer on the positive wire to adjust its speed manually. I've done this before without problem on other laptops but this one will just continually up the ...
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47 views

Volume Control - Logarithmic Potentiometer Placement

Thanks in advance! I am building an headphone amplifier with PCM1794A, OPA1612, and OPA1622. Where would be the best placement of the logarithmic potentiometer for volume control without decreasing ...
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31 views

Help Identifying an Alps Potentiometer

I am having trouble identifying this potentiometer. I am 99.9% sure it is made by Alps, less sure but somewhat thinking it is an RK097 series. It is about 25mm long overall with a roughly 12mm long ...
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5answers
133 views

Diy slider potentiometer?

Hi I need to use a 25cm (10inch) long slider potentiometer for my project. I can't find them anywhere so I'm thinking of getting a PCB made and putting some resistive material on it. My PCB ...
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Centering joystick potentiometers in a controller

I've replaced a joystick in my Dual Shock 4 controller, because it was getting stuck. The readings of the new joystick are offset to right and down. I've read that you can recenter the readings by ...
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1answer
39 views

Making a replacement 5V reference g sensor

I'm looking to make a replacement G sensor for a vehicle for which the sensor is no longer available. Here is some background on the system. The Gravity (G) sensor is a vertical low-g (gravity) ...
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1answer
53 views

Potentiometer vs Arduino, How to replace? [closed]

I have a bldc motor control board(ESC) with potentiometer, the pot is used for controlling speed but I want to use arduino's pwm, so how to remove the pot and replace it with arduino connections? The ...
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Pot Power calculations is a searching process to determine the peak power (75- 99 % of linear pot). Why is this not normally discussed? [closed]

Here are the math relationships involved. The maximum theoretical power requires a searching process. It is important because the user may park the pot in that position.
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Why does voltage of pirmary circuit in potentiometer increase as we take more length of the potentiometer wire?

In this video by Khan academy, Mahesh Shenoy (The narrator) says around 7:14 of the video that if increase the length of the red wire we take, then the potential supplied by the battery increases (By ...
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Analog linear interpolation of AC signals

I have two AC signals in audio range \$V_1\$ and \$V_2\$, both around \$2\,\mathrm{V}\$ p.p.. I need to interpolate between the two linearly through some external control voltage \$V_c\$ (ideally also ...
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Tektronix P6015 Replacement Potentiometer Considerations

I’ve acquired (saved from the landfill) an old Tektronix high voltage probe, model P6015. The probe body and cable are in decent condition, but I discovered two damaged potentiometers in the ...
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1answer
81 views

How to use this 12-bit ADC chip

I have a technical question asking how to use this IC in my application. I am converting 0 to 5Vdc from a potentiometer to a 12-bit digital representation using a 12-bit parallel output ADC IC. This ...
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97 views

How can a potentiometer boost a voltage signal?

I was looking at this project a person did to make their Prius regenerate more power instead of letting it go to waste on brakes: This probably sounds dumb to you, but it boggles my mind. How can a ...
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Potentiometer getting burned out while connected between motor and 5V 2A ac adaptor

I have an old trimmer with damaged battery. I know it is more economical and reliable to buy a new one rather than repairing it, but I find it interesting to play with electronics/electricals. I want ...
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1answer
44 views

3 Phase potentiometer

A bunch of old equipment I use at work (built between 1990 and around 2003) use what my coworkers call "Three Phase Potentiometers". They are rotary potentiometers with 5 connectors. ...
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1answer
72 views

How to blend to guitar audio signals?

TL;DR: Can I use a blend potentiometer to blend two audio signals? I have an Ibanez GSR 200 bass guitar. It has a potentiometer to control the volume of the neck pickup and another potentiometer to ...
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1answer
56 views

Identify This Alps Potentiometer

I'm trying to replace a broken potentiometer on a Native Instruments Traktor Kontrol S2. My guess is that it is from the Alps RK11K series. From what I can see: Part number: 103B 305C - I haven't been ...
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1answer
62 views

“Disconnecting” an opamp from a potentiometer circuit

Last time I asked about changing a sensor (which is a potentiometer) output in various ways. I've decided to go with an opamp and circuit like this: Now I'm looking for some device that will ...
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1answer
79 views

Will a potentiometer let me adjust the volume on an RCA to 3.5mm headphone cable?

I don't know a lot about EE, and this might not be the best place to ask, but I have a really basic question. I'm thinking about cutting an RCA to 3.5mm cable in half and inserting a pot for volume ...
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1answer
63 views

Increasing the “range” of a potentiometer?

For a recent project of mine, I wanted an adjustable resistance between 10Ω and 100kΩ, however none of the potentiometers I had went above 10kΩ. While I would have been able to put a few of them in ...
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1answer
103 views

Nextion Display not updating data from Arduino

I am using an Arduino Mega to display the readings of 4 pots on a Nextion Display as well as store it in an SD Card with the time stamp. I keep getting recvRetCommandFinished err on the serial ...
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If we use potentiometers as volume controls, don't they waste electric power?

I recently heard that we use potentiometers to reduce the volume levels in audio devices. Will it waste electrical energy?
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68 views

Potentiometer heats up after changing wiring

I changed wiring on my LED array. I switched from a 24 AWG to 18 Gauge cable. I used the following potentiometers. However after changing wiring, all potentiometers (tried new ones and unused) started ...
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2answers
102 views

Potentiometer partial range usage

I have a 100k ohms potentiometer. My problem is that I have a control stick that goes from left to right representing a very small angle - corresponding to 618 ohms of the potentiometer's range. So ...
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1answer
158 views

Christmas LED dimming circuit with potentiometer

I need help. I would like to dim LEDS of a Christmas tree with a potentiometer. Here is my electric diagram. (Please note I'm a beginner in electronics.) I don't know how to choose a good value for ...
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103 views

Reducing speed of motor in cheap record player

I bought a cheap record player, and it is spinning too fast. It is using a 12V 1Ainput with what I believe is a cheap Chinese 12V motor for turning the belt. There is a pitch control on the turntable, ...
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1answer
78 views

Change output voltage range from potentiometer

I am using a 10K potentiometer to produce an adjustable voltage of 0..3.3 V from an input voltage of Vin = 3.3 V. How can I change the circuit so my adjustable voltage range is 1..2 V ?
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i want to know if the potentiometer is broken or just dirty and if it's broken can i find the same in the market? [closed]

Hi i have speakers labtec arena 530 . i opened the main speaker and the problem is from the potentiometer I can make a brigde and connect 2 pot of the potentiometer sound become clean but i loose the ...
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1answer
269 views

Potentiometer identificaiton Logitech z623 Speaker

I've been searching and can't locate a suitable part. Perhaps due to inexperience. This is the volume control for a Logitech Z623. I believe it's 100k Ohms based off the code on the side, but cant be ...
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92 views

What is the shield pin on a potentiometer?

I am looking at the symbol for a potentiometer and I see the normal 3 pins, however there is an additional pin called shield. What does shield mean? Is it ground? Here is the symbol I'm looking at: ...
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2answers
161 views

Connecting potentiometer to an FPGA simply

I have a question about connecting a potentiometer to a FPGA. I am connecting a potentiometer to an external 8 bit ADC chip that is outside the FPGA. I want the pot to represent a speed setpoint ...
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28 views

Atmega88P ADC not working

I have an Atmega88P (default 1 MHz clock) and I'm trying to have a LED blink and to regulate the luminosity of another one using the potentiometer. For the first LED I used TIMER/COUNTER0 in CTC mode ...
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Attiny85 Serial Transfer INT from Teensy 4.1

Goal: Transfer incoming Analog Pot Data into Attiny85, convert to INT and send it out to Teensy 4.1 to read. I have programmed my ATTiny85 to handle a 7 Segment LED (partial code below). It takes the ...
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AD5242 to generate a current source

We are trying to program the potentiometer with I2C using Arduino Due. The SCL-SDA of AD5242 are connected on the SCL-SDA (D20-D21) of the Arduino. We are using MATLAB to program and operate the ...
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77 views

Potentiometer output voltage for inverting amplifier and non-inverting

When setting the voltage input to 2V from potentiometer, why does it increase to 2.55V after the Vout of potentiometer is disconnected for an inverting amplifier? And remains the same voltage of 2V ...
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1answer
68 views

Can someone please explain how to add an external potentiometer to a voltage regulator with a trim pot? [closed]

I'm building an LED light panel and I'm setting up the electronics according to this video. As you can see, he uses a 22K potentiometer and a 6.8K resistor. I would like to understand why he uses ...
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3answers
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Question based on rotary potentiometer and resolution

Can anyone help me how to come up with this question's solution? Question: A rotary potentiometer consists of a fine wire wound on a circular former, whose inner diameter is 2.5 cm. The resolution in ...
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1answer
133 views

MOSFET in place of potentiometer

Since in potentiometer we control it by rotate its knob anticlock wise or clock wise...so in that place i want to control it by using MOSFET and Arduino means the working of the knob i want to control ...
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1answer
57 views

Modify the output voltage on a PWM controller to fall within LED driver range

I'm trying to use a simple PWM controller (this) as a dimmer for a Meanwell LED driver (this). The driver accepts PWM dimming but needs a voltage range of ~2-8V, and the PWM controller outputs 7-12V ...
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29 views

In LTSpice, how to get Op Amp TL072P and potentiometer? [duplicate]

Hey I'm new to LTSpice XVII, I couldn't find TL072 or potentiometers in the component library...Could someone kindly guide me on how I could get these two components
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I have a Potentiometer - 5 k ohm 2W from a Mosa DC Welder; With Strange Test Readings

The pot is a Digikey part. The readings for the 5 kΩ pot start at .025 Ω to a high of 1.91 kΩ ... but it occurs 75% of the way into the rotation of the single turn pot, and then it drops to 1.39 kΩ at ...
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Digitally controlled potentiometer X9C103P gives erratic resistance measurements

I have a digitally controlled potentiometer (DCP) X9C103P (datasheet) which I am trying to operate. Following are the pin connections I've made refering to its datasheet: Pin 1: INC (resistance ...
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2answers
61 views

What is the relationship between speaker volume change and resistance change?

Assume that we have a speaker whose volume is controlled by the potentiometer. If the resistance of the potentiometer changes by X%, and speaker volume changes by Y%, what is the ideal relationship ...
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1answer
82 views

Identify potentiometer [Radio repair]

I need a replacement part for the potentiometer depicted below, dimensions are approx. 16x13.5 mm. The bottom reads "B100K" and "SEL" and the resistance between the two outermost ...
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1answer
70 views

Hole for the disc type knob potentiometer

I am going to use this potentiometer: and looking for advice on the best practice for the hole for the disc. The panel is having flat inner and outer surfaces, and the thickness of the panel is 2 mm. ...
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2answers
173 views

Can we explain the differential pair in terms of resistances?

It has always been a big challenge for me to find the most general ideas behind great circuit solutions that can be illustrated by simple electrical concepts... and even by non-electrical analogies ...

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