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Help Request- Adjustable Pulsing LEDs

post #1 of 6
Thread Starter 

Looking to get some help making a simple circuit that will be adjustable and make LEDs pulse/breathe/throb. This is what I would to achive;


This is what I found as far as instructions go;

http://www.moddingtech.de/tutorials/...led-fader.html

http://www.instructables.com/id/Thro...ith-555-Timer/

but neither of them include a potentiometer. I am a noob when it comes to electronics so please keep it simple. I'm looking for a parts list and a schematic of the circuit. Any help would be appreciated.

Cheers!
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post #2 of 6
You need a potentiometer in order to control the speed at which the lights blink.

EDIT: Scroll down on the Instructables guide and read one of the comments.

This guy swapped out the cap for a 220uF cap and a 50K variable resistor (AKA potentiometer) to get the lights to blink at adjustable intervals.
Edited by Volvo - 4/3/11 at 6:03pm
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post #3 of 6
Thread Starter 
Quote:
Originally Posted by Volvo View Post
You need a potentiometer in order to control the speed at which the lights blink.
I know that's why I said neither of those instructions include that. That's why I'm asking for help.
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post #4 of 6
Just edited my above post.
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post #5 of 6
My meteor lights do that except its basically a cold cathode not a fan.
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post #6 of 6
Right^^^^
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