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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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3 votes
4 answers
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Applying a voltage by DAC to a Feedback pin of a DC-DC controller

I want to design a variable output voltage in the following design: For having this variable voltage either I can use a potentiometer instead of R13 or I can apply a voltage by DAC to the feedback pin:...
Andromeda's user avatar
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2 answers
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Active Bandpass with "Tunable" F Using Potentiometer

I'm trying to construct a simple bandpass filter circuit using the multiple feedback topology with one op-amp (I'd like to leave out a dual-opamp approach for now). I'd like the center frequency to be ...
Nils L's user avatar
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1 vote
2 answers
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Potentiometer for Kitchen Fan

I'm exploring the possibility of building a potentiometer for my rangehood fan. The manufacturer (FanTech) of the fan actually sells one (EC-10VHL) but I'm having a hard time trying to find a ...
vince chung's user avatar
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2 answers
64 views

Trimmer Potentiometer with Unexpected Voltage Range

I designed a voltage divider circuit using a trimmer potentiometer 3224J-1-103E for the first time. But, upon receiving the board, I found out that I was unable to tune the potentiometer across its ...
imthegman55's user avatar
0 votes
2 answers
52 views

What is the difference between capacitive liquid level sensor and potentiometer liquid level sensor

I have a sensor I use to determine the level of water in my swimming pool. One person has told me it is a capacitive sensor and another said it works like a potentiometer. I would like to know what ...
user1114881's user avatar
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potentiometer volume control of backup beeper

Total newbie here. Please bear with me. I am interested in making a gag gift for a friend, which uses a typical audio mixer slider to control the volume of a typical backup beeper. This is Not ...
Bruce Simonson's user avatar
0 votes
1 answer
66 views

How does this LDR circuit work? [closed]

All I know is that when I turn the lights off, the LED should light up, but I don't know how and why it works. Can you help me? I'd like to know how it works. The 10k there is a potentiometer. The ...
fireBreaker_2007's user avatar
1 vote
1 answer
62 views

Need Guidance on a DIY crane project

I'm working on a DIY project and am in need of a little guidance with my circuit setup. Here is the setup: Motor: 12V, 0.6A, 10W (max output), Load current: 0.6A, Stall: 1.65A, Potentiometer/Switch: ...
Levair1968's user avatar
-1 votes
1 answer
62 views

How to test potentiometer with 4 In Line terminals [closed]

I need to test 3 identical Claro potentiometers that have 4 In Line terminals, (not 3 together and one elsewhere as others have asked about). These are Claro EPVR/341 potentiometers that are also ...
MickRanger's user avatar
3 votes
4 answers
180 views

Using a Potentiometer to consecutively turn on 4 LEDs one at a time, while turning off the all LEDs before it

I'm not quite sure the simplest way to describe this and I'm only using LEDs as my example because it's the easiest way to simplify my circuit. I need to use 1 potentiometer to turn on 1 LED, then as ...
ajbubba's user avatar
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1 vote
1 answer
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Understanding AM/FM stereo receiver schematic

I am working on a parts list to build a AM/FM Stereo receiver (see https://electronics-diy.com/pdf/TEA5711.pdf). It's a design from Phillips Electronics using the TEA5711 IC. It was published in ...
Don Wilson's user avatar
0 votes
1 answer
71 views

Name of mini potentiometer type?

I’m doing a repair of a compressor, but can’t find the potentiometers I need. I seems like a miniature version of the classic size that normally has 5 mm, and instead everything about 20% smaller. The ...
Noah Richmond's user avatar
1 vote
1 answer
94 views

How would I decide on the best LED intensity for TCS3200 sensor

This is for a custom project to detect fluid color and turbidity (a reduction in light passing through) using an Arduino micro, a TCS3200 sensor, and an LED. The tube sits in a custom housing, and the ...
Bilal Bahadır Akbulut's user avatar
0 votes
1 answer
60 views

Should two potentiometers be powered by same source or separate?

I have two potentiometers. One measures the water in a tank up to a certain point. The second takes over after that and measures the water above the first. Currently I am powering both at the same ...
user1114881's user avatar
0 votes
3 answers
151 views

6 Pin Potentiometer

I have a 6 Pin Potentiometer. I know that the 3 pins are separately a potentiometer and the other three pins are a part of other potentiometer. My question is what will happen if I externally short ...
Preet's user avatar
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2 votes
2 answers
60 views

Changing potentiometer range with a resistor network

I suspect this may not be possible but I wanted to check with the hive mind first. I have a float sensor with a resistance range of 22 to 220 ohms that needs to drive a gauge that shows full at 7 ohms ...
davecove's user avatar
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11 votes
4 answers
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Why is the level wiper wired like this in the op-amp stage?

I have come across a mixer that I am going to rebuild, and maybe try to replace the volume potentiometers with a digital variant. The picture shows part of the schematics (after 3-band EQ, and before ...
DennisHolm's user avatar
3 votes
2 answers
206 views

Adjusting load voltage with a potentiometer

I'm reading the book "Practical Electronics for Inventors, 4th Ed", and I find it great, but I'm stuck on this (seemingly straightforward) section on page 321: First off, the values in the &...
Loris's user avatar
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0 answers
63 views

Rheostat with parallel resistor, how to make the taper more linear?

I'm using a 10k potentiometer wired as a rheostat in parallel with a 470 ohm resistor, because I need a (roughly) 500 ohm variable resistance in a circuit. The type of potentiometer I'm using is not ...
one_three_three_seven's user avatar
1 vote
2 answers
74 views

Potentiometer - confusion about arrow direction

In this schematic, is the left pin of the potentiometer connected to 6 and the middle pin connected to 7 or vice versa?
math_noob's user avatar
3 votes
2 answers
201 views

Reading potentiometer with analog multiplexer and ADC: how to buffer

I'm building a MIDI controller with a bunch of endless potentiometers. They can be either 10k or 20k. I'm planning to read the values with an ADS7953. This is a 16-channel ADC. It has one converter ...
Szabolcs Szekelyi's user avatar
1 vote
1 answer
70 views

How can I add the same resistance to two resistors?

I have a resistor and a capacitor in series, connected in series to a parallel capacitor and resistor (there is an error with uploading the picture of it) ...
Almog's user avatar
  • 21
2 votes
2 answers
83 views

How to Build Durable, DIY Capacitive Sliders for a Custom Macro Pad?

I'm working on a custom macro pad project and I'm planning to include three 50mm long sliders. I'm leaning towards capacitive sliders due to their suitability for my design, but I'm flexible on the ...
AstralJaeger's user avatar
0 votes
2 answers
48 views

Courtyard Determination for SMT Trimpot

I would like to use the Bourns PVG3G103C01R00 in a design and am trying to figure out how to determine the courtyard for this part, compliant with IPC-7351B. I do not currently have access to the IPC-...
user196021's user avatar
0 votes
0 answers
54 views

Is there a set procedure you should follow when you have three adjustable potentiometer that you need to make adjustments to [duplicate]

The question I posed is to do with a project I am working on, It comprises of a 24V D.C electric motor, 200W, 3,000 rpm, 13A. which drives a drive shaft via pulley, and belt, on the shaft is a ...
Drew1815's user avatar
1 vote
1 answer
89 views

Divide the voltage output of a DC power supply

I'm a beginner in electronics and I am teaching myself the basics of schematics and electricity. I designed this simple circuit that allows to choose individually the voltage across 5 resistors and ...
Hypno07's user avatar
  • 11
4 votes
4 answers
1k views

Is it OK to leave one of the potentiometer pins open in this case?

I want to use two potentiometers to limit current and fine tune the load of a basic photodiode circuit. The diode specifications and the voltage values are not yet clear but I want to use two ...
user4444's user avatar
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0 votes
0 answers
45 views

Replace ring encoder in a circuit

So a ring encoder on my car's HVAC control module went bad. There is another identical encoder on the same PCB. I took readings of the voltage across al five pins of the working one while changing ...
Manuel Ruiz's user avatar
0 votes
2 answers
85 views

How to pick resistor values for a potentiometer?

I have a potentiometer that ranges from 100-845 ohms and I have quite a hard time finding out resistor values for a range of 1V (100 ohm) and 5V (845 ohm). I am forced to use this potentiometer and ...
Grégoire Morin's user avatar
0 votes
1 answer
211 views

Load cell simulator-mV/volt generation

I am trying to simulate a full bridge sensor load cell. Here is the reff to the image: https://www.scribd.com/doc/140674267/Load-Cell-Simulator-v2 Above is the reff circuit I am using. I know that ...
Altroz's user avatar
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1 vote
1 answer
39 views

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 ...
Klumpy7's user avatar
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1 vote
0 answers
53 views

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 ...
Bradbut's user avatar
  • 11
3 votes
0 answers
82 views

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 ...
Manuel Ruiz's user avatar
2 votes
1 answer
88 views

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 ...
Jamie Bach's user avatar
0 votes
1 answer
163 views

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, ...
DariShard's user avatar
-4 votes
1 answer
76 views

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 ...
Roilan's user avatar
  • 1
-1 votes
3 answers
2k views

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 was going to connect the 5V power to the potentiometer, and connect the output from the potentiometer to the ...
jukebox41188's user avatar
0 votes
1 answer
83 views

Making adjustments to the potentiometers on a Electronmen EM - 285 DC - motor speed regulator

How to install and operate an 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 it up, I find that there are ...
Drew1815's user avatar
2 votes
1 answer
452 views

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 ...
KJ7LNW's user avatar
  • 2,180
2 votes
3 answers
2k views

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 ...
NewGuyKnowsNothing's user avatar
0 votes
1 answer
36 views

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 ...
KLOMPE's user avatar
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2 votes
1 answer
113 views

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 ...
user16307's user avatar
  • 12.2k
0 votes
0 answers
52 views

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 ...
Steven's user avatar
  • 101
1 vote
1 answer
249 views

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 ...
Mbadugha Chimuanya's user avatar
2 votes
2 answers
269 views

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/...
user1584421's user avatar
  • 1,369
1 vote
2 answers
49 views

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 ...
William Jerome's user avatar
0 votes
2 answers
87 views

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 (...
Nathan Kahn's user avatar
0 votes
0 answers
47 views

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 (...
user1584421's user avatar
  • 1,369
0 votes
1 answer
113 views

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 ...
Nathan Kahn's user avatar
1 vote
1 answer
72 views

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 ...
Chakra41's user avatar

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