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

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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.
 
If it is battery powered, i recommend a small buck regulator from National, e.g. LM2594-adj.
 
Here is a good place to start looking
**broken link removed**

or use this link to jump right in for a 2 LED flashlight
operating from a 9volt battery
**broken link removed**

Bill Bowden's excellent Led resistor calculator will also come in handy
**broken link removed**
 
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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