I am looking for advice on my first proper science project. I am planning on having some sort of input device on my room, probably a simple keypad that sends a bluetooth signal when one of the buttons is pressed to a display sign outside my door, so when my parents knock, i can send one of a few set messages/ symbols to them.
I have looked all over the internet for good sites and although I'm not ready to build a robot yet, it's definitely a plan of mine for the future, so I though I'd ask here first. I've read lots of cool articles on simple circuits before posting.
My plan is to attach a small keyboard (5 to 9 buttons) to a microcontroller, which also has a usb output for connecting to my PC for programming, and a digital output to a class2 bluetooth module.
The second piece would be a bluetooth receiver plugged into some sort of display device (an lcd screen/ one of those cool new projection display chips?).
My parents will pay any reasonable amount for the kit I need (as it's for school :-) ) but I don't want to break the bank so any advice on where to order the kit from would be cool.
The main thing I need is the actual details of how to program the thing once i've built it. I think even if i got all the right bits of equipment, I wouldn't know how to tell them what to do - what software I would need.
Does my plan sound possible? Will it be too difficult for someone who hasn't really built anything like this before? Am I on the right site for advice?
Thanks in advance.