azahn123

I am using an Arduino Mega with my project and the analogue connections (I am using pots) sometimes flicker rapidly... (Only within a small range of about 2-4 numbers). Is there anything I can do to fix this with max?

Basically I think there must be a way to say....

if number does not change more than 5... then dont change the number.

If number changes less than 5, do nothing.

If number changes more than 5, then change the number to pot value.

I figure that there must be a way to program this (with JAVA ?). Or with max objects?

I am using an Arduino Mega with my project and the analogue connections (I am using pots) sometimes flicker rapidly... (Only within a small range of about 2-4 numbers). Is there anything I can do to fix this with max?
Basically I think there must be a way to say....
if number does not change more than 5... then dont change the number.
OR another way to say it...
If number changes less than 5, do nothing.
OR
If number changes more than 5, then change the number to pot value.
I figure that there must be a way to program this (with JAVA ?). Or with max objects?


max-with-analogue-controls-flicker-of-controllers-with-arduino-fix-with-java

This is a common problem, and is arguably best solved 'at source' first, ie in your circuit. The analog inputs on these boards are often prone to voltage bleed or crosstalk - make sure any unused inputs are connected to a common ground. Are the pots themselves a little old or flaky, this might also cause erratic readings. Adding capacitors to the circuit on your read lines (to ground) can act as low-pass filters; try values from 0.01nf, 0.47nf, 0.1nf (haven't had to use these myself but it is common advice). Did you write the code yourself or hack someone else's? You could add a smoothing function to it:

//sample and increment the input ten times, divide the result by the number of samples;

or, simpler, a short delay at the end of the loop function.

Search the forum for the keyword 'smooth' or 'interpolate'; there are hundreds of responses to this type of question cos it's so common!

byte mySamples = 10;
myVal = 0;
for(byte i=0; i
  myVal += analogRead(A1);
}
myVal /= mySamples;
//sample and increment the input ten times, divide the result by the number of samples;

THANKS AGAIN CHRIS !!! I found an old patch that you worked on ... Here is a screen shoot of it ... It is working perfectly !!!

ACTUALLY one more question .. It this patch ... That you wrote ... It is only giving me nice whole numbers... My pots will sometimes be outputting floating point numbers... SO... How would I alter the patch to accomodate this? ... Lije for example if I have a number like .68 and it is flickering between .67 and .69 ... Is there a way to have it stick to .68 or around there ? ((OR event like rounding numbers like .88732 up to a specific decimal ?))

ACTUALLY one more question .. It this patch ... That you wrote ... It is only giving me nice whole numbers... My pots will sometimes be outputting floating point numbers... SO... How would I alter the patch to accomodate this? ... Lije for example if I have a number like  .68 and it is flickering between .67 and .69 ... Is there a way to have it stick to .68 or around there ? ((OR event like rounding numbers like .88732 up to a specific decimal ?))


MAX with Analogue Controls: Flicker of controllers with Arduino. FIX WITH JAVA?