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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27 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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55 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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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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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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144 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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Need help checking an ADC0808\ADC0809 chip in a arcade shooting game [migrated]

Main Question: How can I check a ADC0808 chip to determine if it needs to be replaced or if my issue is something else? Any advice you can offer is SO appreciated! ADDITIONAL INFO When the arcade is ...
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498 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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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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49 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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Identify manufacturers of trimmer potentiometer and capacitor in photos

Can somebody identify these manufacturers (marked in red rectangle)?
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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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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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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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861 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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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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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
65 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
70 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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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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84 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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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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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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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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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
86 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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46 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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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
72 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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34 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
80 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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35 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
45 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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117 views

Why is my 5K potentiometer sparking during regulation of LED bulb? [closed]

There are two potentiometers in my DC circuit analysis. When I turn on the wall switch, which is connected to the 220V transformer which is in turn connected to the circuit, one of the potentiometers ...
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94 views

Using Analog potentiometer as a digital one to SW control

I try to read an analog potentiometer that will control specific software functions. That means that I want 0 fluctuations in its reading. For this reason, moving average and other techniques do ...
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50 views

Knob control (360 degree clockwise and anticlockwise) using servo motor with arduino

I am working on a project in which I have a knob on HMI which in turn has a potentiometer behind the knob. Now I want to control that knob using Arduino or any microcontroller.i have to rotate it 360 ...
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103 views

Speed up or slow down motor of cassette recorder using a potentiometer

Background: There is a cassette recorder (RadioShack CTR-80A) and its owner would like to have the ability to speed up and slow down the motor to record and play the sound in a distorted way. We've ...
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1answer
50 views

SMD potentiometer direction

I currently struggling with a circuit and trying to identify the parts which may cause the problem. The circuit needs a trim potentiometer. Mine looks like with the symbol Does the direction have ...
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258 views

Design review - RGB LED color mixer using PWM

I'm trying to make an RGB color mixer. LED strip runs on 0.5-2A. It has internal resistors. LED Strip needs 5v, has one pin for that, one for red, one for green, and one for blue. Each LED module that ...
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1answer
71 views

Is there a practical way to convert a log potentiometer to an inverse log one?

I want to convert a log poti to an inverse log poti. The difference is shown below: Let's say we have a 10k log poti, is there a practical way to inverse the output so that we can obtain something ...
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1answer
43 views

potentiometer as voltage divider and taper

assuming that I'm going to change the potentiometer value (now is 50K linear) to 100K linear, should I also change the value for R1 and R2 in order to keep the same taper and the same power ...
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57 views

What could be the reason to use a current source for potentiometric vane measurement?

On page number 507 of this document, there is a signal conditioner for a potentiometric wind vane. It seems like they use a current source but I don't get how the mechanism works. I guess O/P ...
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214 views

Lowering resistance of potentiometer?

I saw a video where a person wired a resistor to the outer pins of a potentiometer to lower the resistance. Does this work? And if it does, can I still use the wiper and an outer pin with it lowered? ...

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