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[b]Controlling the brightness of two white LED's[/b]

Discussion in 'Electronic Projects Design/Ideas/Reviews' started by lionking83george, Mar 20, 2004.

  1. lionking83george

    lionking83george New Member

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    Hi to all. I want to control the brightnes of 2 white LEd's. I know that has to do with the current but i can find any circuit. If u can send me any schematics would be great. My input voltage must be 9V.
     
  2. Sebi

    Sebi New Member

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    If it is battery powered, i recommend a small buck regulator from National, e.g. LM2594-adj.
     
  3. Russlk

    Russlk New Member

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    You need a current limited source, there are ICs specially designed for driving LEDs, do a google search.
     
  4. dave

    Dave New Member

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  5. tansis

    tansis New Member

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    Here is a good place to start looking
    http://www.e-f-w.com/community/index.php

    or use this link to jump right in for a 2 LED flashlight
    operating from a 9volt battery
    http://www.e-f-w.com/community/modules.php?name=News&file=article&sid=28

    Bill Bowden's excellent Led resistor calculator will also come in handy
    http://ourworld.compuserve.com/homepages/Bill_Bowden/led.htm
     
  6. sunny12558

    sunny12558 New Member

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    Location:
    philippines
    i used to play with LEDs connected as lighting for computers. you can simply connect these in series connected to 12v or less [ whiteled - whiteled - 100ohms - 5kohms mediumtype potentiometer as dimmer (with switch if you want on-off). It work for me, no heating up! thanks
     

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