Thank you so much, it works!

Hi, yesterday I did the new Java update from Apple and now, I can't boot Arduino anymore. I've got a "Cannot launch Java application" eror message. Anybody got the same problem?

remember to place a big capacitor at the arduino output pin because the dimmer doesn't like the fast PWM pulses.

What kind of value are we talking about for the capacitor?

Thanks, it seems much better now with the resistor and the condenser. Also, I know the dimmer doesn't like PWM. In my older circuit (the one who gave me 5v) I used a condenser to regulate the PWM. This is a real newbie question but I figure the condenser I'm using now will act the same?

Hi,

I'm using an Arduino to control a dimmer. The dimmer needs an analog out 0-12v. I'm using the following circuit to get 12v instead of 5v:

http://itp.nyu.edu/physcomp/Tutorials/HighCurrentLoads

Basically, this is just a TIP120 connected to the PWM out and to the 12v out. The problem is that instead of getting 0-12v with PWM from 0 to 255, I'm getting 6v-12v.

Hope I'm clear enough in my explainations. Any solution or cue to help me fix that? Or any other suggestions to get 0-12v from 0-5v?