I have been wanting to create something with one of these things but I'm not really sure where to start. From what I can tell, some of the boards have built-in WiFi, or others you can add an expansion card to give it that functionality. To give some ideas on what I would like to accomplish: Device that downloads local weather forecast every morning and if it is calling for cool or rainy weather, disable my pool heater since we would not be using the pool that day anyway. The heater has inputs for remote control like this (similar to how a home thermostat would work to control a furnace or A/C). Device that monitors pool water level and sends an email, text, etc to alert me to a potential leak. I have a couple other ideas but I think one of these would be my first project. From what I can tell, you can connect just about anything to these boards. Some have built-in relays or otherwise you could connect external relays. I'd most likely run these off of A/C with a 5v(?) DC adapter.