Hi ,
I want to drive 25 led(may be at once) with a µ-controller. The maximum current the µ-controller can source is just 400[mA]...if i limit the current of each LEDS ... i want to as well... to be 20[mA] for each LED....what is the clever method of driving all these leds 20[mA] each.....may be i can use some external LED driver or something...i tried google..most of them show transistor current driver..something other than that would be real help.
I want to drive 25 led(may be at once) with a µ-controller. The maximum current the µ-controller can source is just 400[mA]...if i limit the current of each LEDS ... i want to as well... to be 20[mA] for each LED....what is the clever method of driving all these leds 20[mA] each.....may be i can use some external LED driver or something...i tried google..most of them show transistor current driver..something other than that would be real help.