white led - little pwm driver

[Fragrance]

white led pwm driver

Hi Friends

I need information about how i make a white led pwm driver any idea on that,

regards
Fragrance

 

[E-goe]

white Led

Look at w*w.maxim-ic.be

I believe they have an application note about this topic.

Greetz E-goe

 

[E-goe]

Sorry wrong adress
w*w.maxim-ic.com

 

[E-goe]

Found one

MAX1984

 

[Fragrance]

IF I

HI FRIENDS

If i do not want to you the integrated chip should any body provide the solution with transistor type pwm

regards
Fragrance

 

[cube007]

Hello Fragrance,

please take a look at: **broken link removed**
You will find a Elektor article for builidng a LED torch with a uC PWM controlled Step-Up DC/DC converter.
Why do you want to develop you own PWM driver? ICs from Maxim, Linear, TI, ... are more effecient.

by,
cube007

 

[Fragrance]

What i got

Hi friends

I am thank full to mr cube007 look at this attachment what i got this is pwm driver with two transistor and one coil power required 1.5v i just made it working fine,

regards
Fragrance

/Deleted. "w-led torch.zip" was uploaded before:

(klug)/