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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1answer
47 views

Is this variable resistor not connected to ground?

I want to build the following PWM fan controller circuit: I am not sure about the connection of potentiometer. Usually one of the terminals is connected to the supply voltage and the other is ...
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56 views

Enhanced precision in the middle of a potentiometer

I am building a flight simulator rig that uses potentiometers to measure the position of various controls. I'm using a 10 bit ADC to read the value of the potentiometer as a fairly basic voltage ...
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60 views

Which resistor should I add in place of potentiometer in XL6009 boost converter module to increase 3.7 V to 12 V? [closed]

I'm using 18650 batteries with XL6009 boost converter module to increase 3.7 V to 12 V. There is a potentiometer to control the output voltage in boost converter. But can we fix the output voltage to ...
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75 views

I need help identifying this 10K 4Pin potentiometer

This blue Potentiometer is from a Numark NV DJ Controller. It has 10K, 4Pins and I need to replace multiple of them, since they're getting less accurate. You can get them for 12€ the piece on a ...
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113 views

4-wire fan controlled by potentiometer and 555 IC not behaving properly

Here's the schematics: Forgive me for the newbie schematics. This is the first time making one. I used an LMC555CN IC and this Delta BFB1012VH-5D84 Blower Fan (Can't find a datasheet for this one). I ...
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76 views

Can I control a PWM Fan with only a potentiometer?

If not, what else component do I need to control the fan? I ordered the parts and is still yet to arrive and am a newbie in electronics. I want to know if this is doable. Components I ordered: 5k, 10k,...
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1answer
67 views

Counter potentiometer's varying linearity on a microcontroller [closed]

I have a sliding potentiometer and whilst its a linear one, it is not completely linear. I wanted to know if there was a way to filter out the linearity variance using mathematical operators on a ...
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1answer
95 views

Control variator with linear slider potentiometer

I need to replace the rotary potentiometer of a VFD DELTA variator with a slider potentiometer to control the speed of a motor. I have tried some of those slider potentiometers for stereo and mono ...
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50 views

Do No-Load Trimpot Exists

No-load potentiometers exists - they take themselves out of the circuit when turned all the way up. I've been looking at a number of sites - Aliexpress and others, to find no-load trimpots. But, I've ...
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65 views

Potentiometer contact surface between carbon track and solder pin lost its conductivity

I have a 10k stereo slide potentiometer with the carbon tracks pretty much intact but one of the short 'traces' that connect the ends of tracks to the solder pins seems to have somehow deteriorated ...
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51 views

Is it possible to design SPDT switch without using relay or any mechanical part?

We have system like on the photo below. These logarithmic potentiometers(10k Ohm) are adjusting motor speed. One potentiometer is used to adjust speed of motor when door contact is closed(door is open)...
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41 views

ATtiny13A - PWM x 3, ADC x 2 [closed]

I want to control 1 RGB LED and 2 potentiometers by ATtiny13A. I want control the RGB LED by 3 PWM ports and read values of 2 potentiometers by 2 ADC ports. Is it available by ATtiny13A? Can I ...
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91 views

How is this potentiometer connected? Is pin 2 not connected? It makes no sense

How is this potentiometer connected? Is pin 2 not connected? It makes no sense... The resistance between pin 1 and 3 is always the same, so why is pin 2 not connected? (Image source: Electronics Area ...
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105 views

How to turn 4 LEDs on one-by-one using a potentiometer (without programmable device)

I am trying to build a simple circuit that contains 4 LEDs. All LEDs (except for the first) would initially be off. I would then like to use a potentiometer to turn on the LEDs one-by-one. For example,...
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8answers
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How can I solder or mount this potentiometer on a PCB?

I need to use this potentiometer: (Vishay 534-11103) …on my board but I don't know how I can do that. I appreciate any ideas or replacement suggestions. Manufacturer's datasheet link here. As asked ...
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1answer
69 views

Water level sensor giving erratic readings

I am designing a water level sensor using two 2mm graphite rods about 10cm long. I have attached the leads for my schematic to the graphite rods using silver epoxy. I am using an Arduino Pro Mini pin ...
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1answer
102 views

can you re-center xbox one joystick potentiometer by reducing resistance between wiper and one of the pins?

Modern game consoles are beset by "joystick drift" which is due to their potentiometer's readout being unbalanced when the pot is at its physical 50% point (that is, when no force is applied ...
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129 views

reading potentiometer with external ADC

I am a newbie and my first post. So please excuse my ignorance in advance. My project is to create a handheld readout to read potentiometer(s) (10K linear precision pot) with minimum 10000 steps ...
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3answers
61 views

How are potentiometers connected in an amplifier gain circuit?

I am trying to understand the circuit below. Please look at the highlighted circle, Imagine that the potentiometer has 3 pins namely, A, B, and C. If A is connected to -ve inverting input of the op-...
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1answer
35 views

Rotary Potentiometer Switch Options

I'm looking for a rotary potentiometer that comes with a momentary push switch. I came across this Bourns PTR90 potentiometer with rotary switch and I'm wondering how does the rotary switch works? It ...
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1answer
41 views

Mimicking the output of a piezo sensor with a membrane potentiometer

High level I'm trying to use an electronic drum pedal as an electronic drum trigger. My specific e-drum unit has only one pedal input, so I need to repurpose a drum trigger input in order to use more ...
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2answers
101 views

Reduce a potentiometer value from 1M to 500K

I have an AC speed controller board and I would like to replace the 500K potentiometer on it with a potentiometer/switch combo to suit my application. However, the potentiometer I have is valued at 1M....
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1answer
66 views

ADC Charge up time

I have a potentiometer transducer with a 5V swing, which goes into a divider, then a voltage follower, then a RC filter and finally the microcontroller (see schematic below). My issue is even though ...
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3answers
624 views

Is a potentiometer an actuator or sensor?

While I was taking notes I get confused by the component named "potentiometer", I don't know in which category I should place it. If I'm correct the definition of a sensor is broadly "a ...
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1answer
91 views

Replacing analog potentiometer with digipot for DC motor speed control

I have a device with a beefcake DC motor controller like this one: https://www.bodine-electric.com/products/dc-controls/filtered-pwm-dc-basic-speed-control-open-chassis/0780/ The speed is controlled ...
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1answer
50 views

If a circuit from a voltage source has a potentiometer to ground, does voltage increase or decrease when resistance does?

Below is a CRT circuit I am trying to fix, specifically the HV circuit. In the bottom right corner, a reference voltage comes from the flyback and makes it's way to U701 on the HV. IN pin. My question ...
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1answer
69 views

MG996R that can rotate all the way around, but behaves like a normal servo

So I bought an MG996r online to replace a dead one in my robot dog, and I always test my new servos by hand and then by using sweep. When testing this one by hand, I found that I could turn it all the ...
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2answers
76 views

Can i use 47 kilohm potentiometer instead of 50 kilohm potentiometer?

I am trying to build a circuit from a schematic I found on Internet. The circuit uses 50 kΩ potentiometer. But I have only 47 kΩ potentiometer and 100 kΩ potentiometer with me. Can I use them instead ...
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3answers
70 views

Soldered test point on production board?

I understand having test points on a production board, but what would be the point of selectively soldering some of them? It doesn't modify any resistance, right? I assume that the large numbers of ...
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1answer
184 views

Having trouble reading serial data from ADC chip with FPGA

I am trying to read serial data from an ADC chip (AD7476A) that converts 0 to 3.3V into 12 bits, with an FPGA development board (Nexys A7-100T). I use 12 LEDs on the FPGA board to display the 12 bits ...
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2answers
94 views

What does a resistor pointing to the middle of another resistor symbolize?

As the picture shows, is this a potentiometer, or is it supposed to be two resistors?
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42 views

DC step-up converter, slecting 2 different Vout with SPDT switch

I want to modify a DC-DC step-up converter that uses a single potentiometer that sets the voltage to use a single SPDT switch where I can select the output voltage during operation without turning the ...
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1answer
60 views

Bench power supply - Inconsistent voltage output

It's been 3 years since I first bought my bench power supply, a Long wei LW-K3010D. This issue has reoccured to me a couple of months ago, but it usually "went away" when the PSU was ...
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1answer
62 views

Sensors used in Compact elctronic vehicles

I am doing a group report on Compact electric vehicle and was asked to determine suitable sensors to measure the longitudinal speed and throttle pedal position of the vehicle. We did some research and ...
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73 views

Linear thumbwheel potentiometer obsolete?

I am trying to find a possibly obsolete linear thumbwheel potentiometer, like the type used in old radios. There seem to be plenty of logarithmic pots around. I can find linear but they are marked as &...
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3answers
488 views

Can't get ADC chip to work

I am connecting a 10k potentiometer to an ADC chip (LTC1273BCN) that has a 12-bit parallel output, like in the diagram at the end of the post. The 12-bits will be connected to an FPGA input bus after ...
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1answer
78 views

Is it normal for a PWM fan with a potentiometer to compensate by pulling additional current or is there additional circuitry?

I've modded a laptop fan with a potentiometer on the positive wire to adjust its speed manually. I've done this before without problem on other laptops but this one will just continually up the ...
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2answers
59 views

Volume Control - Logarithmic Potentiometer Placement

Thanks in advance! I am building an headphone amplifier with PCM1794A, OPA1612, and OPA1622. Where would be the best placement of the logarithmic potentiometer for volume control without decreasing ...
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35 views

Help Identifying an Alps Potentiometer

I am having trouble identifying this potentiometer. I am 99.9% sure it is made by Alps, less sure but somewhat thinking it is an RK097 series. It is about 25mm long overall with a roughly 12mm long ...
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5answers
179 views

Diy slider potentiometer?

Hi I need to use a 25cm (10inch) long slider potentiometer for my project. I can't find them anywhere so I'm thinking of getting a PCB made and putting some resistive material on it. My PCB ...
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33 views

Centering joystick potentiometers in a controller

I've replaced a joystick in my Dual Shock 4 controller, because it was getting stuck. The readings of the new joystick are offset to right and down. I've read that you can recenter the readings by ...
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1answer
45 views

Making a replacement 5V reference g sensor

I'm looking to make a replacement G sensor for a vehicle for which the sensor is no longer available. Here is some background on the system. The Gravity (G) sensor is a vertical low-g (gravity) ...
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1answer
62 views

Potentiometer vs Arduino, How to replace? [closed]

I have a bldc motor control board(ESC) with potentiometer, the pot is used for controlling speed but I want to use arduino's pwm, so how to remove the pot and replace it with arduino connections? The ...
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2answers
45 views

Pot Power calculations is a searching process to determine the peak power (75- 99 % of linear pot). Why is this not normally discussed? [closed]

Here are the math relationships involved. The maximum theoretical power requires a searching process. It is important because the user may park the pot in that position.
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Why does voltage of pirmary circuit in potentiometer increase as we take more length of the potentiometer wire?

In this video by Khan academy, Mahesh Shenoy (The narrator) says around 7:14 of the video that if increase the length of the red wire we take, then the potential supplied by the battery increases (By ...
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63 views

Analog linear interpolation of AC signals

I have two AC signals in audio range \$V_1\$ and \$V_2\$, both around \$2\,\mathrm{V}\$ p.p.. I need to interpolate between the two linearly through some external control voltage \$V_c\$ (ideally also ...
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66 views

Tektronix P6015 Replacement Potentiometer Considerations

I’ve acquired (saved from the landfill) an old Tektronix high voltage probe, model P6015. The probe body and cable are in decent condition, but I discovered two damaged potentiometers in the ...
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1answer
84 views

How to use this 12-bit ADC chip

I have a technical question asking how to use this IC in my application. I am converting 0 to 5Vdc from a potentiometer to a 12-bit digital representation using a 12-bit parallel output ADC IC. This ...
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2answers
113 views

How can a potentiometer boost a voltage signal?

I was looking at this project a person did to make their Prius regenerate more power instead of letting it go to waste on brakes: This probably sounds dumb to you, but it boggles my mind. How can a ...
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69 views

Potentiometer getting burned out while connected between motor and 5V 2A ac adaptor

I have an old trimmer with damaged battery. I know it is more economical and reliable to buy a new one rather than repairing it, but I find it interesting to play with electronics/electricals. I want ...

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