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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2answers
72 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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58 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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92 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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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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65 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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53 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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49 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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38 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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66 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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3answers
96 views

pcb trace to act as a potentiometer?

I'm looking to track the position of a pin on a shape display. I wanted to see if it's possible to make a PCB trace that could be put on the side of the pin and act as a potentiometer to gauge it's ...
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41 views

Rotary potentiometer nor reading linear

I have a question conserning some strange values I get when sampling a rotary potentiometer using an STM32F103CB MCU. The circuit is as follows: Potentiometer(powered @+5V from a custom PCB) -> ...
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33 views

Drive stepper motor with potentiometer in Siemens PLC

It is difficult for me to drive a stepper motor with potentiometer (position stepper motor with position potentiometer). I've done program, to see the value from potentiometer with NORM_X. I am using ...
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1answer
70 views

Using analogRead() with ATtiny85

I'm new the ATtiny series of Atmel MCUs and I've been trying to build a DC-DC boost converter with an ATtiny85-20PU recently. To get started I've been trying to control the brightness of two LEDs by ...
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2answers
63 views

Voltage divider with potentiometer - Failsafe

I have a voltage divider circuit producing a reference voltage as follows: Vref is the control voltage for a regulator, and Vmeasure the output voltage of the regulator, with Vref being regulated to ...
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3answers
54 views

4 Pins Potentiometer (Replacement)

I am trying to repair a very expensive manlift joystick. It has 4 pins total, three like a normal rotary potentiometer and then a fourth across from the other three pins. It is PEO 284-04378 Type EJ ...
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149 views

What would happen if I used a potentiometer to produce a 5V DC signal for an Arduino from a 9V battery?

What makes the potentiometer not a good component to use for reducing the 9V to 5V DC for an Arduino? I thought of using it but I been told it is not a good idea, so I am looking into the reasons why.
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Connecting linear potentiometer to arduino

Please help I am still a newbie. I would like to know how I can go about connecting a liner potentiometer to arduino .
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1answer
501 views

Trying to identify this potentiometer marked “B5K”

I'm trying to identify this potentiometer as accurately as possible: On the rear it says: B5K. It has two rows of 3 pins each: ...
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2answers
51 views

How to determine regulator's components values?

The final goal is to have an output (u0) of 22 V. The only information given is the uBE value of 0.7 V and the maximum load current of 1 A. I'm having a hard time determining basically every value ...
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2answers
54 views

Using a slider potentiometer with an Arduino

I'm new to electronics and in the process of building a Joystick using an Arduino Leonardo. I am reusing parts from an old Joystick from the 90s https://www.amazon.com/F-15E-HAWK-Tactical-Control-...
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Finding right potentiometer to control the speed of a 240v DC, .5amp, permanent magnet motor

I have a faceting machine with a 240v, .5amp, 3000 rpm, permanent magnet motor which is repeatedly burning out the JH-50KA potentiometer which controls it speed. I am not sure this is the correct (...
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47 views

Best practice when choosing a trim pot value

I have a basic comparator circuit I'm working on designing. I want one of the reference voltages to be tunable, so using a trim pot. My Vcc is 12V, so assuming a 1/4 watt pot, 1k seems like the lowest ...
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1answer
58 views

Identify manufacturers of trimmer potentiometer and capacitor in photos

Can somebody identify these manufacturers (marked in red rectangle)?
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2answers
67 views

Change resistance value after starting a circuit

I am trying to build a simple LED blinker as a nightlight for my son's bedroom, based on this circuit. But my knowledge of electronics is basic at best. This circuit has a 10k pot that was supposed ...
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1answer
21 views

Wiring an air conditioner blower motor in a Ford Mustang

I am having some wiring issues with my vehicle following a fender bender. Everything on my air conditioner works as expected except for the blower motor. I can confirm it is a new blower with issues ...
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58 views

Why or how would a volume pot work if connected in reverse, and how to simulate it?

I've come across a way to connect a regular pot to be used as a volume or gain pot, but the input and output terminals are reversed. It seems that this way of using it is somewhat common in the ...
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2answers
868 views

Potentiometer as variable resistor

I designed this circuit to scale a sine wave with a +/-5 V swing to scale to 0-5 V. Also I'd like to be able to attenuate the input. That's why the potentiometer is there (connected as a variable ...
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3answers
86 views

Big Muff Pi Black Russian Pots

I try to repair a Big Muff Pi Black Russian, which was assembled in 2001. Unfortunately, I don't understand the labeling of a broken pot. See picture below. Since the device was assembled in Russia, I ...
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63 views

Will a lower resistance potentiometer improve a panel meter scale reading?

I have an analogue tacho/RPM panel meter on an auto distributor tester, c1950s. This is not the original meter. It has two scales 0 - 6000 rpm and 0 - 1000 rpm, with a toggle switch between the two. ...
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1answer
86 views

LTC3780 DC-DC 5-32V converter: suddenly fault and hot

I have planed to build a variable voltage DC power supply based on LTC3780 DC-DC 5-32V converter. I guess you are familiar with the converter, but I am attaching and image for illustration. I used ...
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1answer
72 views

Compensate potentiometer wiper resistance with negative resistance [duplicate]

Is it possible to compensate a digital potentiometer's 75 ohm wiper resistance with a negative resistance amplifier?
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1answer
61 views

Here is a design for a RGB color mixer. Is it fine, or did I mess up somewhere? Is there room for improvement? [duplicate]

LED strip has resistors built in. LED strip runs on 0.5-2A. LED Strip needs 5v, has one pin for that, one for red, one for green, and one for blue. I will be using a total of 4.8 volts. Using ohms law,...
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2answers
89 views

invert a momentary switch with a relay

I have a 2 pin foot pedal that is an NO switch. When i press the pedal down, the circuit closes. I basically need it the other way round. This will be used to operate a switch on a DC motor speed ...
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1answer
48 views

Potentiostat circuit biased with three independent sources

How might a potentiostat circuit be designed such that it is biased with three independent AC sources, the reference electrode is biased at $$\varepsilon = 2sin(\omega t) + 3sin(\omega t) + 4sin(2\...
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2answers
38 views

Question about audio amplifier circuit

I was looking at an example of a simple audio amplifier circuit and have a few questions... In the circuit below what represents the 1 and 2? What is their role in the circuit? Also, I've seen ...
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38 views

Voltage controlling a SMPS via a potentiometer by Arduino

I have started a new project. The idea is that in a SMPS we will have the potentiometer at the back so that when we vary the pot the output voltage will change. We are currently doing it manually, but ...
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2answers
47 views

symbol of a potentiometer with a buoy to work as a level sensor

I am designing a circuit and I am going to use a potentiometer with a buoy to work as a level sensor. What symbol do I have to put?
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1answer
33 views

creek 4040s2 (amp)

I have a 4040 s2 amplifier. The 10kOhms balance potentiometer seems to be broken (it used to makes a crackling noise when fiddle with). Being quarantined, the only repair that seems currently possible ...
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1answer
128 views

Bypass volume potentiometer

Can't get my headphones replaced in warranty during COVID lockdown so I am forced to fix the old ones. I have a pair of old headsets that have this volume potentiometer that I would like to bypass ...
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3answers
50 views

Class D amps ALWAYS ON?

May I just ask if Class D amplifiers are expected to stay continuously on, flat out, at full power and never have the volume reduced?! I’ve recently obtained this: http://www.amplifier.co.uk/images/...
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75 views

Will a Potentiometer Work?

I have absolutely no electronic knowledge and need clarity. I have a fuel gauge and sender unit that are reading at different resistances at the sender and at the gauge. Full at sender is 0 ohms (...
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1answer
43 views

Choice of material for a cylindrical potentiometer

I want to sense position along a slightly curved metal rod (length 100mm, diameter 5mm) for a project. For the wiper element, I'll be using steel wire of diameter 0.3mm, the length of which runs ...
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1answer
73 views

Turning potentiometer changes other potentiometer's value(STM32)

I have finished building my DIY simulator pedals for PC hacking together a 2-pedal set and adding a third. Pressing the Gas pedal. All good Pressing the brake pedal.All good However when pressing ...
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103 views

Is there a way to make a force sensitive resistor vary its resistance from 0 Ω to 5kΩ?

I want to replace a potentiometer with a force sensitive resistor (FSR.) I’ve bought one that varies from 1kg —0g. I don’t need the middle pin of the pot, I need it to work as a resistor. My circuit ...
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36 views

Gamecube controller hack with raspberry pi

Electrical noob here. I am trying to control a gamecube controller from a raspberry pi. Meaning: I want to have wires from the pi soldered onto the board of the gamecube contoller and emulate button ...
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2answers
86 views

how to measure current of high voltage 150Hz pwm signal?

I have a step-up converter which produces 130V DC and 12mA max current I generate 130V pulses using an optoisolator PWM duty vary between 10 to 50 (255 max) at 150Hz frequency, but my load (...
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DVOM nonstop auto ranging resistance on 1 pin of potentiometer

I think this is a newbie question, but I was trying to measure a couple of pots with my new meter, and on one set of measurements (one set of pins) I'm just getting a nonstop auto ranging all over the ...
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36 views

FG Servo Motor Inconsistent

Need some help with fixing up a belt drive turntable using a Frequency Generator DC motor. I have the same turntable as the person on this post, so schematic is the same: FG servo motor speed issues ...
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1answer
46 views

How does “mechanical stop” and “electrical angle” differ for this potentiometer?

I want to use this potentiometer which is continuous turn. In the datasheet it says: Effective Electrical Angle ...............340 ° +3 ° and there is also: Mechanical Angle ................ ...
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1answer
44 views

Need to hack joystick so I can simulate its input from raspberry pi

I need to trigger a joystick from a raspberry pi. What I mean is, I want to be able to solder to a gamecube controller's board and trigger the input from a raspberry pi. I have little to no experience ...

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