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### Topic: PWM slope with arduino ethernet (Read 1 time)previous topic - next topic

#### drewpalmer04

##### Jan 07, 2013, 08:31 pm
Any ideas on how to accomplish a 0-255 slope over 8 hours and then back down again at the end of the time frame?

I have two PWM drivers for LEDs and need them to slowly slope over the duration and then back down again for night time.

THANKS!

#### fungus

#1
##### Jan 07, 2013, 08:42 pm
1) Find out how many milliseconds are in 8 hours.
2) Divide that number by 255.
3) That's how often you need to go up a step.

No, I don't answer questions sent in private messages (but I do accept thank-you notes...)

#### drewpalmer04

#2
##### Jan 07, 2013, 08:49 pm
Thanks..

BUT I mean the coding for that...

Clueless how to code that...I figured the math out

#### Docedison

#3
##### Jan 07, 2013, 11:38 pm
Uh... I know, I'll Get a Book...   Naah, That is *money* I Think I'll search Google for that Free Wiki course on C++...

Bob
--> WA7EMS <--
"The solution of every problem is another problem." -Johann Wolfgang von Goethe
I do answer technical questions PM'd to me with whatever is in my clipboard

#### drewpalmer04

#4
##### Jan 08, 2013, 04:44 pm

Uh... I know, I'll Get a Book...   Naah, That is *money* I Think I'll search Google for that Free Wiki course on C++...

Bob

Man this forum isn't anything more than a bunch of smack talk. For whatever reason...I'm learning...MY BAD

#### Boffin1

#5
##### Jan 09, 2013, 02:13 am
If you are still around,  have a look at blinkwithoutdelay in the example sketches, play with it to blink at the interval you have calculated.

If  ( theres the clue ) it gets to 255 , make it reverse.

ditto for zero.
45 years of editing projects with a knife and soldering iron, then I found Arduino !

#### fungus

#6
##### Jan 09, 2013, 08:02 am

Man this forum isn't anything more than a bunch of smack talk. For whatever reason...I'm learning...MY BAD

LOL!

What did you try? Did you make any effort at all? Did you google for one of the hundreds of similar programs then try to adapt it? There's no sign of any of that in this thread...
No, I don't answer questions sent in private messages (but I do accept thank-you notes...)

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