Just a heads up for those of you who are walking with a Sony NEX, you probably know there isn't an intervalometer on the market for it. All other remote controls I've found are very basic, just shutter buttons.
I tried making one of those DIY IR blasters but that failed as my phone's audio jack didn't have enough power to light the bulbs. So I just bought a MaxStone. It's a pretty neat little IR blaster that connects to your phone via bluetooth. Set up the app and voila, you can now shoot timelapses with your NEX.
http://us.imaxmax.com/
I bought mine off Amazon for 50 CAD which is a very good price for an intervalometer.