Help - Simple program with a button changing the value of a variable

Using Arduino Programming Questions
#1

Hello,

I'd like to create the following program: each time I press a button, a variable takes the next value among these values: 3, 11, 19, 49, 68, 75, and then it goes back to 3 and so on...

I tried many options but I can't make it work...

Any idea?

Thank you.

#2

Put the values in an array and use the count to access the value.

Weedpharma

#3

What he ^ said. Plus make sure you debounce the button press to avoid skipping values.

#4

Also make sure you look at the state change detection example, and increment the counter ONLY when the switch BECOMES pressed (not IS pressed).

#5

PaulS:
Also make sure you look at the state change detection example, and increment the counter ONLY when the switch BECOMES pressed (not IS pressed).

That's pretty much what I meant, Paul, but worded it very poorly. :frowning:

#6

OldSteve:
That's pretty much what I meant, Paul, but worded it very poorly. :frowning:

You need to do more to debounce the input than just detect the state change because, by definition, if/when the switch bounces it will produce several state changes.

#7

That's pretty much what I meant, Paul, but worded it very poorly.

But debouncing is important to, even when using the state change detection philosophy.

#8

UKHeliBob:
You need to do more to debounce the input than just detect the state change because, by definition, if/when the switch bounces it will produce several state changes.

When I said I worded it poorly, I meant that I should have used more words to describe the situation better - debounce the actual press and detect the state changes.
Depending on the program, a simple delay can even do the job, without further code. (And you get auto-repeat for free.)

#9