Need idea... trigger for sleep mode

I updated the project. I don't want to hijack the original post, so here is the topic. I have to say that I love how it turned out. I think you should definitely utilize something like this if you even somewhat think it'll be handy for you. I'm going to wait to put a finish on it to make sure it's working properly, but so far it's been stable and flawless. If you have a 3-d printer, it's would definitely make for a good project.