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method to drive and control brightness of Luxeon 1A led

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dilan2005

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luxeon brightness change

hi,

i need some design on to drive luxeon led and control the brightness of it.it is better if the design is a swichmode type current source so i can vary the current and change the brightness of the led.

please post your suggestion about this!

Thanks a lot!

rgds
dilan
 

mosfet luxeon star

hi,
may be this it will be useful for you:
bye good luck
 

Schematic Switching Supply For Luxeon Star LEDs
 

Layout Switching Supply For Luxeon Star LEDs
 

PCB Switching Supply For Luxeon Star LEDs
 

Table resistor Switching Supply For Luxeon Star LEDs
 

i really appreciate your help guys!
ultimately i find a simple ( not very much energy efficient method ) to control the brightness of a led using N mosfet (IRF540) and linear regulator. (lm317 as current source)

i have attached my sch to control brightness using a pic micro controller.
 

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