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PostPosted: 23.01.2008 02:25 
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Junior Modder
Junior Modder

Joined: 23.01.2008 02:15
Posts: 3
Hi there,

I'm new here and I don't have too much experiance in electronics. I am trying to get an LED to gradually "charge-up" and fade on. I am not really interested in the LED fading off I just need it to fade on.

In this 2 min and 18 second video you can see an example of what I am talking about at 00:31.

http://youtube.com/watch?v=G_-SSu4CTXY

Notice how the light gradually gets brighter.

Any help would be much apprceciated!

Thanks in advance!


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PostPosted: 24.01.2008 04:52 
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Junior Modder
Junior Modder

Joined: 23.01.2008 02:15
Posts: 3
Anybody? :( :(


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PostPosted: 24.01.2008 09:06 
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Site Admin
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Joined: 24.01.2002 10:09
Posts: 4683
Location: Finland
Can't find any schematics at this moment.

I believe that the idea would be to start to charge a capacitor when the power is turned up. In front of the capacitor would be an adjustable resistor that would alter the fade-in time. Next to the capacitor would be a transistor that would start to conduct more when the cap charges up. The transistor would then drive the leds/lights.

Anyone willing to test this and draw a schematic? :)

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PostPosted: 27.01.2008 17:38 
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Junior Modder
Junior Modder

Joined: 23.01.2008 02:15
Posts: 3
japala wrote:
Can't find any schematics at this moment.

I believe that the idea would be to start to charge a capacitor when the power is turned up. In front of the capacitor would be an adjustable resistor that would alter the fade-in time. Next to the capacitor would be a transistor that would start to conduct more when the cap charges up. The transistor would then drive the leds/lights.

Anyone willing to test this and draw a schematic? :)


Thank You Japala!

Do you have anymore info on this? I'm willing to pay for a schematic. :wink:


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