For "real time" sensor nodes, I assume you mean on the order of same second or same minute type networking. The Pi is much better for that in my opinion than an Arduino or other embedded processor. If you're a few milliseconds off here or there, it's not a big deal for most data logging. A...

You can get stepper motor drivers going up to at least NEMA 34 motor sizes. I use NEMA 34 on my milling machine CNC conversion. The drivers I'm using for it are MA860 drivers like this one: http://www.ebay.com/itm/like/331393094727?ul_noapp=true&chn=ps&lpid=82 Figure out the motors you need,...

Cool project. As others have mentioned, it could be a bit hazardous, but that's no reason not to try it. Just understand the risks first, ask for help if you need it, and be safe. 1) I would definitely keep the original touch pad and timing device from the microwave. Why? The microwave was designed ...