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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What is the name of those transparent soft plastic cases around a potentiometer's hull?
I can't find the name of those transparent soft plastic cases that one can put around a potentiometer's hull to protect them from short-circuits. Anyone?
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Time delay of LED dimmer circuit problem
I made a LED flip flop circuit using NPN transistor, it works pretty fine.
But my problem now is I don't know how to control the on and off time delay for the LEDs using potentiometer.
I tried putting ...
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MOSFET overheating and voltage drop
I've searched on the network for days but couldn't find a solution to my problem I hope you can help me.
I want to create a DC motor speed regulator using IRFZ46N as a power MOSFET and a 10k ...
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Simulate a thermistor to fake temperature readings in heater
What I want to do
Control an old heater to avoid running during hours where kWh is expensive. Bonus: Getting a more even inside temperature.
How I plan to achieve this
I know there is a product where ...
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Dual potentiometer the solution?
I'm working on retrofitting '14 Lincoln MKS 14 way power heated/cooled seats into a 2002 4Runner. I have all motors & lumbar wired. Had a Eureka moment on the TED and got it working!
3 position on/...
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Relationship between volume control position and signal voltage
Of course, it depends a lot on the taper of the volume control.
I need to know how turning the volume knob affects signal voltage.
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How do I connect potentiometers to a power supply so that I can use one to vary current and the other to vary voltage
I want to connect two potentiometers in a way that will allow me use one to vary the output voltage and the other to vary the output current, I'm getting confused about connecting this.
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Using potentiometer to control speed and direction of electric motor rotations
I want to create a circuit that will allow me to conveniently control a 3V electric motor - specifically I want to be able to control how fast it rotates and in which direction.
From usability ...
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What size pot to control the volume of a single small 4" 16 ohm speaker that's plugged into a headphone jack of my Soundblaster card in my PC?
I have a 4" 16 ohm speaker in the overhead of my flight simulator cockpit. It will be plugged into a headphone splitter that goes to my SoundBlaster board in my PC. I would like to use this ...
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Potentiometer rated power and 16 LEDs
Using 5 mm through-hole LEDs, 4 in series and 4 in parallel, 3.3 V, 25 mA, 16 in total. Battery voltage is 12.9 V (car lead acid).
I want to control brightness using a carbon potentiometer 15 mm dia, ...
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Limiting potentiometer to 10% and 90%
I am new to using potentiometers and I just wanted to see if this is possible,
I know you can use resisters to alter the value of the potentiometer and starting values and so forth.
I have a 5 V ...
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Smoothing potentiometer output
I am building a paddle controller for my Commodore C64. Basically all you need is a 470k (or 500k) potentiometer connected to two of the joystick wires. Internally, the C64 has capacitors through ...
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Using a potentiometer to shift between negative outputs from either -2V and 2V
The question that I am wanting to ask is that I start off with either 5V or -5V which is reduced to -2V or 2V for my output for the potentiometer. My potentiometer has a 5k resistance and I am trying ...
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Reason behind my potentiometer getting short circuited or blasted
I was implementing a small circuit in which I used a potentiometer across the Live and neutral and after a few seconds while I was trying to operate the knob the potentiometer blasted or short-circuit....
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Are these trim potentiometer measurements expected? [closed]
I am trying to replace a 2-D analog joystick assembly that no longer works, because I dropped it. The assembly looks just like the one pictured in this forum post.
My question is about the trim ...
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Cut current below potentiometer level
I have this simple schematic where 2 LEDs are meant to be dimmed and brightened alternatively with a pot. What I would like to achieve is for the middle position, both LEDs to be off and then on each ...
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How to dim an LED with a 10 k potentiometer?
I would like to know how to use a 10 k potentiometer with a small LED. Each time I try, the LED won't turn off completely and also it used only 20% of the potentiometer. I would like to be able to ...
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Variable resistor that will not 'crackle' with DC when adjusted?
When using a standard carbon potentiometer as a variable resistor it will 'crackle' if exposed to a small DC voltage.
The DC is unavoidable and the circuit functions as desired except for this '...
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Datasheets, dimensioning questions
I have a problem reading this datasheet.
This one is very weird, does 3-1.5 mean that pin is 3 mm wide, and 1.5 mm is meant to be a radius, or does it mean 1.5 mm and that that 3 means three pins?
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Potentiometer wiring
We currently have a potentiometer that is connected to Allen Bradley 22a-d2p3n104 to regulate speed of a motor (A).
I would like to keep that connection but also need to connect the potentiometer to a ...
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Basic Variable Loundess Audio Amplifier
I am a beginner, looking to make an extremely basic variable loudness (gain) audio amplifier. I have a general idea of how a class A amplifier works, but I am not sure how to make one variable.
This ...
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Can you help me identify a broken potentiometer?
I have a wierd potentiometer and i have search for a couple of days now but i can´t find it. Are anyone of you familiar with this one?
It´s broken so i need to replace it, and the axis trough it is ...
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Please help identify this potentiometer
I'm seeking help in identifying this potentiometer in order to find a suitable replacement and/or to understand its pinout. It is a thumbwheel volume control from a circa 2005 external computer ...
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Weird values from ADS1115 chip and remote I/0 error
I am using a ADS1115 chip to read the values from a potentiometer and then transfer them to a raspberry pi zero w.
I wired the potentiometers, so that on the left would be the lowest. GND - DATA - VDD....
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Can you replicate a Trimpot with a 555 timer?
I'm currently a senior ME major and just entered the EE world to complete project so I'm a little lost.
I am building a circuit powered by an Arduino Mega Chip. The circuit is to control ...
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Is it safe to short signal to max in a volume control potentiometer in a video doorbell?
I have a video doorbell as in the picture below:
However, I cannot hear the bell when it rings. So I opened the device to get to the control volume potentiometer. As in picture below:
What I did is ...
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Identify rotary encoder or potentiometer?
I'd like to fix my old receiver/amplifier. It has a broken button "balance", but after opening and extracting the component I have no idea what I should buy to replace it. From my point of ...
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Need help on resistor calculation
I'm currently work through an application note from Texas Instruments about building a programmable power supply. The base concept is fine and I understand it, now I'm trying to go through the ...
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How to Wire Potentiometer Wiper
It appears as though the wipers are unwired in this schematic. Are only the far left and far right pins wired in this circuit?
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Purpose of potentiometer ground wire
I purchased a rod potentiometer and was surprised to see it came with a 4th wire. The manufacturer said it was a ground, though the wiring diagram didn’t even mention it.
What’s the purpose of a ...
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Please teach me how to select and use a potentiometer
The situation: A 3v to 4.5v pump, a 9v battery (or a 4.5v 3xAAA holder because I could use either but currently have a 9v in my setup) - hook them up pump moves water. That's as far as I have gotten.
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Faking a loudness pin for a standard volume potentiometer
Older amplifiers often employed a volume pot that had a 4th "loudness" pin (which I take it varied with volume up until 40% give or take after which it was fixed).
Unfortunately, newer ...
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how to functionally ground a potentiometer?
I live on the top floor of an apartment building with an extremely loud buzzer that anyone on the street can access day or night - and they do. I hacked into the apartment intercom station to install ...
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Need help with potentiometer for DIY magnetic stirrer
I am looking to make a DIY magnetic stirrer for cleaning 3D printed resin models. In principle, the setup is not very complex; a motor, potentiometer, power supply. The problem is I am a novice when ...
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Rheostat circuit help
How much can I actually vary with this rheostat and what resistance value should I make it to get precise control of the RPM of the motor- maybe control in +100RPM by varying resistance and then ...
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6 pin B50K potentiometer: DIY alternative?
I have a 6-pin B50K potentiometer used for the Bass/Treble control of a desktop speakers set.
This pot is broken and getting this piece is costly to get (price, time - mainly from China).
I don't need ...
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Potentiometer vs PWM for voltage tuning when charging a li-ion battery
Planning to buy a 30V adapter for charging a 7S li-ion (BMS integrated) battery. Need to reduce voltage to 29,4V.
Considering mainly the health of the battery, would an integrated potentiometer be a ...
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How can I use op-amps to compare two varying signals, and send out a signal if they deviate? [closed]
I am going to make a circuit (APPS, Accelerator Pedal Position Sensor Circuit) that sends out a signal if the input signals deviate more than 10%. It's one inverted signal (10V-0V) and one non-...
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What type of trim pot material to handle up to about 5mA wiper current
I'm working on a design that requires that I trim a couple of legs of a circuit. It looks like 200 Ohm trim pots get me in the right area. The wiper current on one trim pot will be somewhere between ...
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Any solution to reduce the tolerance of a potentiometer? [closed]
In my design we use a slider potentiometer value of 10k with tolerance of 20%.
At particular point of potentiometer whenever I come to that position my resistance value changes every time. Also every ...
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Find resistor values for potentiometer
I'm supposed to find R1 and R2 so that the potentiometer outputs -1 to 1 V. I've been trying for hours so I'm ready to throw in the towel. I know the voltage across R1 and R2 have to be 1 V and -1 V ...
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Logical AND operation using transistors
I asked on a forum some time ago about why my logical AND operation doesn't work and I received this diagram:
I don't use resistors, I use potentiometers to lower the voltage and I tried to adapt ...
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Wire potentiometer to dim LED with only 2 legs
Can this work to dim the LED?:
And let the third leg free?
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Old potentiometer as a special voltage divider model
In an Adruino-like project that is built to deal with worn potentiometers (trimmer pots inside thumbstick, of alps alpine type), I am noticing a consistent set of input reading patterns among all old, ...
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What would be the ADC reading of a potentiometer whose wiper fails to be in contact with the resistor?
This question is part of an Arduino-ESC project I am building from the software standpoint. Some essential hardware questions tend to pop up every now and then.
I noticed electrical noises in old ...
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Schmitt Trigger CD40106 has 5V at input with nothing connected
I am using Schmitt Trigger CD40106BE to make an PWM oscillator with controllable duty cycles. The schematic is shown below:
However, the LED that should be blinking is constantly on. After some ...
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Arduino + ADS1115 + 10k pot noise
I am trying to make Arduino work in conjunction with 16-bit ADS1115 ADC and generic 10k potentiometer. However I noticed that there is some serious noise and values are way too inconsistent. Here is ...
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How would a fast moving slider of a potentiometer affect reading?
I understand that the length of the conducting wire/object is directly related to the resistance to the passing electrical current. This is pretty straightforward to understand. But, I wonder, what is ...
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How to protect potentiometer in adjustable soldering iron?
I have an adjustable soldering iron and noticed that recently at some position of the adjustment potentiometer (R3 in the schematic below, this is the potentiometer ...
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