I control a smoke machine for my halloween display, I use a small relay which can flip an AC circuit, but I'm not using an arduino to power it (it's powered off a 12v relay board connected to a PC. If you're fog machine is like all the ones I've seen, it's simply running the 120v line voltage to the remote and back if you press the switch. It's not a lower trigger voltage to control a relay in the machine itself. Because it's controlling a motor/pump I'd get a more hefty relay that can handle more current than the one you picked out to handle spikes if they occur.

Hey well today I did find that infact the line voltage (240v here) runs straight through the remote, however, the element is heated from the switch on the back so no high current. The pump the remote powers is 240v 16w.

For this, you will want to use something like a small solid state relay, as well as a transistor to drive it with the Netduino.

Would something like this work?

http://uk.farnell.co...ross_price=true

Completely off topic, but the song "supermassive black hole" is now running through my head.

Haha yeah very good song

Anyway I decided that maybe this was a bit above my head. I can code in C# but very basic C so decided to opt for using a small atom computer to handle voice and just use the netduino as an interface.

Ok, so I bought a cheap 500watt smoke machine. It has a 5 pin controller which actually only uses 3 of the pins for the switch and the 'ready' lights. What I want to do is replace the switch with the netduino to time how often the smoke machine outputs. Now I have looked online and seen a few people using arduino's and the like but I think I need help on what to use. First of all I checked the voltage across the switch. It seems it reaches a max of 108volts and the current reaches about 40-50mA. I'm guessing this is powering the pump directly to pump the smoke fluid into the element. So, i'm stuck as to what to use? Can I do this with a transistor? or do I need a relay? Also what type of transistors/relays? I'm quite new to electronics and get confused easily Thanks Rexz ** Just realised this may have been posted in the wrong area. Please could a moderator move, thanks.

Ok so I have an idea but I don't know if its actually possible. What I would like to do is have the arduino stream sound from a computers soundcard over the network. I would also like the netduino to in turn, stream a microphone input back to this computer. The idea I have is that the netduino will be like a client which will have the speakers and microphone. The computer or server itself will handle the voice communications. Would the netduino be able to handle this? I understand it would take some coding to get this all working, but I'm not sure on the capabilities of the netduino. Obviously all this will be created on a Netduino Plus. Any ideas would be great. Thanks