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.)
935 questions
13 votes
6 answers
2k views
Better ways to make a 300 milliOhm potentiometer than using 2 feet of #30 wire and a copper clip
Goal I'd like to design a potentiometer, with a range from \$0\:\Omega\$ to about \$0.3\:\Omega\$, for calibrating the zero-reading of a COTS digital voltmeter. I'd like it to be easily fabricated by ...
- 21.2k
2 votes
1 answer
64 views
A slide potentiometer data sheet shows the option of an insulated lever. Are the metal levers of others connected to something?
In the data sheet for the Bourns PTA series of slide potentiometers (https://docs.rs-online.com/24bf/0900766b80fa58ef.pdf), there are three different options for the levers. Two are metal, the other ...
- 31
1 vote
3 answers
121 views
Limiting Resistance Range of Potentiometer
Im working on limiting the resistance range of a potentiometer that feeds into a motor control unit. This motor control units runs an electric motor. We want to limit the joystick switch pot range to ...
- 21
0 votes
1 answer
124 views
Can I divide potentiometer resistance in a way that is relatively linear? [closed]
I need to vary the resistance between two points in a circuit, so I bought a DS3502 digital potentiometer to use as a rheostat. The issue is that I made a rookie mistake, and thought that I could vary ...
user532051
4 votes
4 answers
589 views
Use of a potentiometer in a simple speaker circuit
I am trying to setup a circuit for a personal project that involves using a PWM signal send a square wave to a speaker. I've tested this circuit and it works, I only need the speaker to play different ...
- 51
0 votes
1 answer
88 views
Motor Controller Ignoring Potentiometer After Fuse Repair – Lathe Runs Full Speed
I have a woodworking lathe with a motor controller that had a blown fuse. I relocated the fuse to the side of the enclosure. The lathe now powers on, but the potentiometer no longer controls the motor ...
- 57
1 vote
1 answer
85 views
Inverter rotary switch connection
I am building a single phase voltage inverter.I have this circuit: The MOSFETs will be power mosfets and the user will be able to select the dc input voltage he wants and this circuit will convert ...
- 498
2 votes
1 answer
140 views
How to calculate volume potentiometer value?
I am assembling a headphone amplifier. Input signal goes from PCM2704 DAC (recommended output impendance 10k or more). I have a question: how to correctly calculate the value of the potentiometer RV1? ...
4 votes
1 answer
671 views
What is this component? Is it some type of potentiometer or rotary encoder?
I am trying to repair a board pulled from a Ziegler fire truck. There is a knob that controls the flow of water through the Graf-Syteco brand HMI panel. The knob has come free and I need to find a ...
- 43
1 vote
2 answers
155 views
How to create an active high-pass filter (with an op amp) that has configurable gain (without changing cutoff frequency)?
I use the following circuit to create an active high pass filter (with an op amp) and apply some gain on a input signal : EDIT : as stated by KFW, my previous circuit picture was showing an inverting ...
- 1,999
-1 votes
1 answer
187 views
What type of potentiometer is this?
The value of a rotatory potentiometer is 1K. It is connected to a 5.1V power supply. The output values from centre of potetntiometer with respect to the angle are given below: 70° - 1 V 145° - 2.04 ...
- 485
1 vote
1 answer
108 views
How do I go about changing these potentiometers?
I'm attempting to replace potentiometers in an old guitar combo amp. Here's how they look: Besides the usual three contacts, each pot has a mounting bracket with four more pins. They look and feel ...
- 239
2 votes
2 answers
147 views
Using resistors to "limit" the range of a potentiometer output voltage
So I want to use a potentiometer and two resistors to scale down a DC voltage to any voltage that is smaller This picture is from the schematic of a analogue synth I want to build. (ericasynth DIY ...
- 33
2 votes
2 answers
140 views
Digital pots are operating in parallel on I2C bus. How do I prevent this?
I have two AD5241 1 Mohm digital potentiometers. Individually they work properly. But when I try to build them into a single circuit to have two each 1 Mega ohm control points, I end up with two 500 ...
0 votes
1 answer
154 views
Identify this potentiometer for a speaker
The volume knob on my speaker broke off but I can't seem to find the part number anywhere. It looks like a 2 gang pot since it has 6 pins. The speaker model # is JBL LSR305
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