LED brightness, how to

[Mac-ca]

heyo,

I'm looking for a way to control the brightness of led's without using a rotary switch

i've only got 5 led's so power restrictions shouldnt be to much of an issue..

I want to control the brightness from dim (near off) to fully bright

 

[Gayan Soyza]

This will full fill your requirement.

**broken link removed**

 

[Mike - K8LH]

How would you like to control them? Using five pots'? A selector switch and a single pot'? Five sets of <up> <down> push button switches?

Mike

 

[Henry T]

This can be done with 2 OpAmps a few resistor a capacitor (and a switching transistor for bigger powers)

The first OpAmp is a sawtooth generator and the second is just a comparator with an adjustable trigger level. This can be done with a potentiometer or what ever you want to use for variable voltage control.

I have an eagle schematic here somewhere for a RGB-controller that works that way, if you want it, I can upload it...