Hello , I am trying to read the potentiometer value, but the readings are not stable. The board is arduino nano . I try with external power supply , same ... in serial monitor i have some like this : 1023 1022 1023 1022 int analogInput = 0; int value ; int last; void setup() { pinMo…

Glad you found the 0-100% version helpful. I also made a 0-255 version. Leo.. // converts the position of a 10k lin(B) pot to a byte (0-255) // pot connected to A0, 5volt and ground int rawValue; // raw reading int oldValue; // for deadband byte Byte; // final byte byte oldByte; // for printing …

Check the 328P datasheet. Analogue readings can always vary by at least on bit. Your topic has nothing to do with Installation and Troubleshooting (which is about the IDE) and has therefore been moved to a more suitable location on the forum.

[image] Exponential filter for smoothing noisy data - Reference - MegunoLink A library to smooth noisy data. This library uses an recursive exponential filter. You can control the amount of smoothing applied using a weight parameter. Est. reading time: 5 minutes …

thank you i was confuse because i read Troubleshooting . I will know now ... Do you think if i use atmega32u4 i will be able to use this code ?

Any analog-to-digital conversion can be on the "hairy edge" between two digital values and be unstable +/- 1 count. Smoothing/filtering "slows down" any changes/variations but it's not always perfect. There is another software method called hysteresis where you essentially ignore small changes. A…

[image] TexHoTpoHuk: Do you think if i use atmega32u4 i will be able to use this code ? Yes. But you will have the same problem. See reply by @DVDdoug ; mine was not clear enough from that perspective.

[image] DVDdoug: hysteresis Thank you ! I will try this ... I think that we can`t talk about analog noice because the pot is next to the board 3 sm cables . I try with capacitor before write in this forum , but nothing change .... will try to add hysteresis in code . And yes , code work …

[image] TexHoTpoHuk: but with unstable wast digit ... Your expectations are unreasonable. (Assuming wast == last)

I found a solution. I tested it and it works very well [image] Potentiometer Jitter General Electronics Hi, and welcome to the forum. I assume you use a 10k lin pot (10kB or B10k), and that your supply is stable. "Smart" code can eleminate the problem you have. Look at…

Usually, a combination of a low-pass filter and hysteresis works best. For example: Arduino Helpers: 1.FilteredAnalog.ino

Welcome to the world of analog. Unlike digital measurements, analog measurements are only stable within a small amount. If your Arduino is powered from 5V then one bit (i.e. 1023-1022 = 1 bit) is 4.88 millivolts. A very small difference. Any electrical noise or interreference from perturbations…

Not stabe pot readings ...how to fix this?

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TexHoTpoHuk January 7, 2023, 7:27pm 9

I found a solution. I tested it and it works very well

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Not stabe pot readings ...how to fix this?

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