Opto-isolator recommendation

Does anyone have an opto-isolator (board) recommendation for use with Arduino's 5V environment and another circuit at 4.5 volts? I decided I need to isolate the active and power hungry servos.

The optoshield would be your sollution.
It was build by the guys and girls from the forskningsavd in Sweden.

Hi fish_

I wasn't able to find the product although I found the site. Do you have a link?

Thanks,

Icek

Well, I couldn't find a shop or pcb lay-out.
But this are some links:

http://picasaweb.google.com/kugghjul/Optoshield#5340421313545305282

I though http://blushingboy.org was selling them...

try MCT2E... work just fine.