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 Post subject: Fading a Luxeon LED
PostPosted: 27.08.2004 10:11 
Hi all,

I'm trying to get a (1w 350mA) luxeon LED to fade in and out with the color fade ciruit. What mods would i have to make to achieve this?
I'm currently lighting the led with a 3.5v constant current regulated power supply.
I'm a relative newbie to electronics. Can I just switch out the LM324 for a higher current handling version and change the capacitor values? And if so...what components would u recommend.
Any help would be greatly appreciated.

Thanks
Bosco


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 Post subject:
PostPosted: 27.08.2004 12:07 
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Hmm... I would get a transistor that can handle the current of >350mA and control it with the fader circuit. Should be the easiest and the cheapest option because the circuit will remain the same.

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 Post subject:
PostPosted: 27.08.2004 20:27 
Thanks for the fast response. Do you have any recommendations on transistor. And how would I go about wiring it into the circuit? I have no idea
Again thanks for you help...I'm sorry i dont currently have more knowledge on electronics.

Bosco


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 Post subject:
PostPosted: 27.08.2004 21:08 
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For example 2n2222a or 2n3053 should do the trick. They can handle 700-800mA of current. At least those would be the models that I would try first.

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 Post subject:
PostPosted: 28.08.2004 03:57 
Where in the circuit would i put the transistor?


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 Post subject:
PostPosted: 28.08.2004 04:08 
Sorry I just figured out what you were saying. For example for 1 LED. I would put the transistor before the LED and control it with the fade circuit, like your example for controlling 1 LED.

Thanks a lot for your help


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