Fog machine Arduino integration I want to control my fog machine with an Arduino.  Has a simple button that is used to activate the machine.  I want to press this button using an Arduino digital output pin, but the fog machine is operating on its own electrical circuit.  How do I use the Arduino to activate this machine?

I a few other machines with buttons that I want to wire into an Arduino, so is there a generic solution?
You can interface with the fog machine's button by:


Use a Relay (this will isolate the fog machine's circuit from your Arduino's)
Use a Servo to physically press the button on the fog machine


I believe those would be the simplest and most generic.