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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28 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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60 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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67 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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54 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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29 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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67 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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85 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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130 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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92 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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63 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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60 views

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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110 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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65 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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135 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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27 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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48 views

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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34 views

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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55 views

Potentiometer output voltage for inverting amplifier and non-inverting

When setting the voltage input to 2V from potentiometer, why does it increased 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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61 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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77 views

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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89 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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51 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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28 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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60 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
65 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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68 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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157 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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37 views

Replace fixed to variable potentiometer on DC regulator

I recently bought a DC regulator (power supply and tester.) It is a 15V and 2A power supply with voltage fixed to 1.5V, 3.6V, 4.8V, 6.0V, 7.2V direct output of the sub-grade and the current is ...
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55 views

Circuit of a potentiometer with switch

in a device I have bought there is this potentiometer with switch: It has 5 pins instead of 3 as a normal potentiometer: two of them are connected to VCC and GND, the other ones i do not know (there ...
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84 views

Can I fix 6 pin volume potentiometer by connecting the Right & Left outputs?

I have a Logitech Z533 speaker system with a 'scratchy' volume control on left channel. Upon examination of the volume control board in the volume puck that sits on your desk, it is a 6 pin pot with ...
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1k views

Potentiometer Specs

I have a schematic for an audio amplifier that states that the volume potentiometer is 20KA. What does 20KA mean in the context of a potentiometer? I don't see anything else that states its total ...
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382 views

How can I wire this square Pot?

How can I wire this 6 pin pot to control a speaker and LED. I know how to wire up normal circular potentiometers, and I feel like this pot may be broken, but how can I tell?
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113 views

TIP120 LED strip dimming with flickering problem + questions delay

I need some help with my Arduino program. Let me introduce the hardware and the goal. There is two white LED strip each one of them are controlled by TIP120 transistor. There is an potentiometer to ...
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179 views

Understanding VFD speed control input using a potentiometer

I am working on hooking up a potentionmeter as a speed control input to a variable frequency drive. Here is are the diagrams from the VFD manual: (Its a Lenze AC Tech SMVector ESV112N01SXB; full ...
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579 views

How to wire up 6 pin potentiometers

How can I wire up 6 pin potentiometers for 3 pins. I need a 3 pin potentiometer for a project, but I only have 6 pin ones available, how can I hook it up to a LED or volume control circuit?
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46 views

Creating identical 'copies' of circuit elements?

I have a circuit comprising of 3 identical nodes connected in a loop i.e. output of 1st node is input of 2nd, output of 2nd is input of 3rd, and output of 3rd is input of 1st. Circuit diagram of the ...
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89 views

Potentiometer's sign of net charge

What charge does the wiper of a potentiometer give? Negative or positive? I connect the left pin to the positive and right pin to negative. My potentiometer looks like this. The wiper is facing ...
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394 views

10K Potentiometer with Arduino Uno and 5v works but same pot with ESP32 and 3.3v floating values

How does the voltage measured by a microcontroller from the output of a 10K potentiometer differ between a 5v circuit and a 3.3v circuit? How does a change from an Arduino and 5v circuit to an ESP32 ...
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218 views

Adjusting Potentiometer Range

I'm using two 1K potentiometers and I want to achieve this result: When the first pot is set to 1K (100%), adjusting the second pot should change the output from 0 to 1Kohms. When the first pot is set ...
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1answer
414 views

Replacing potentiometer with a hall sensor in PWM DC motor control module

I have a DC Motor Speed Controller (PWM) that uses 100KΩ potentiometer to adjust motor speed. And I also have an electronic throttle pedal that used 49E Hall-Effect sensor (+5V, 0.8-4.2V signal, 1KΩ). ...
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101 views

how can we read the exact potentiometer value? [closed]

Can you please How can we check if we have the correct value from a potentiometer in a circuit? thanks for your help
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1k views

What's the effect of shorting the wiper terminal with one of the ends of a trim pot?

EDIT: I realized I didn't draw the schematic properly. Previously, the 100 Ohm resistor wasn't there. I thought I'd done the math correctly for this, but clearly something conceptually isn't straight ...
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70 views

Potentiometer or momentary switch, how to better recognise what was connected?

I have a working circuit and I'm looking for cues on how to improve it. I'm building a device with a user controlled small stepper motor. Speed of the motor can be controlled by a pedal connected via ...
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1answer
98 views

Problem with potentiometer in op-amp audio system design

I have a simple audio setup I am trying to build that consists of an op-amp board (OEP30Wx2), 2 speakers (Dayton Audio ND65-8), a steady 16V power supply (this op-amp requires 16V to drive 8 Ohm ...
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68 views

What causes a potentiometer to get “jittery” after cleaning?

I recently cleaned a potentiometer's resistive element by using general purpose contact cleaner (CRC). I now find that there is "jitter" or non-linear increase in the resistance as I rotate ...
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40 views

What causes a linear taper slide pot to develop dead spots?

new here and judging from the kinds of questions being asked mine is probably too simple. But, I have an old turntable that doesn't seem to recognise the tap that is in the central position on the ...
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82 views

Servo arms (horns) for potentiometer [closed]

I can't find any info on this in google. Basically I am trying to find a servo arm (called servo horns) BUT for a potentiometer. They are probably named differently as the axle shaft is different. All ...

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