A microcontroller for less than 3 cents. Datasheet here as a pdf. I saw this on another site a while ago and just now saw my bookmarks. Originally, I spent several hours looking into it because, I am a glutton for challenges. Eventually, age-based wisdom prevailed. Still, it is kind of interesting. It is OTP and I could not find documentation of programming specification other than references to more expensive commercial programmers. Has anyone had any experience with one?