I am unemployed at the moment, but I’m very busy. I tend to work late nights and wander over to bed when I run completely out of steam. The problem is that this happens at a different time every day. I end up being too lazy and stupid to re-set the alarm clock, so I don’t bother. I oversleep. Recently I realized that I need a special alarm clock that instead of going off at a particular time goes off after a set duration. Like an egg timer, but grand!.

In a brief DIY he explains how to put this together.
If you’re new to programming PIC’s then you’ll find some links at the end of the article to get you started.

Link: PIC wakeup clock