Fading Led (leds) inside computer looking like heart beat.


First of all I want to apologize my English but its not my mothers language.

So what I would like to do is add warm white led (leds) into my computer what would fade out and fade in like really slow pulse. How this could be done.

I can do basic soldering and schematics but the easier the schematic is the better :)
And as cheap as possible because I'm not that rich at the moment.
I have googled this a bit but found so many different versions and also they all faded so fast and I want my led (leds) to fade slowly. And because the idea is to but them to my computer this project would be using either 5 or 12 volt source.

Thanks for all who can help me!


caitlinsdad7 years ago
Markomaani (author) 7 years ago
Hi! Thanks for that! Ill give it a try but could there be possible to make the pulse a bit slower? Make
Sure, you just have to play around with the resistor values from the 555 Astable equation. You can find it here: http://en.wikipedia.org/wiki/555_timer_IC Sorry I can't be more help at the moment, I've got a pile of work to do :-(
Adlab7 years ago
Hey, I've got a circuit that should help you (though you've probably already found a solution by now) http://theadlab.blogspot.com/2009/10/alternate-led-pulsing-via-555-timer.html