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

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lionking83george

New Member

• Mar 20, 2004

• #1

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.

 

Sebi

Active Member

• Mar 20, 2004

• #2

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

 

R

Russlk

New Member

• Mar 20, 2004

• #3

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

 

tansis

New Member

• Mar 20, 2004

• #4

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**

 

S

sunny12558

New Member

• Mar 22, 2004

• #5

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