Hello there. > I received an application ideas book called "Dream Machine Reference > Book" from Phillips. In it they talk about a method of using ... > like the PIC16C74. However, I can not quite understand how the > teqhnique actually works. Does it make any more sense to anyone else > out there? Exactly one year ago there was an article in Scientific American that covered this issue. I know that the resolution can be improved from 8 to 10 bit, I'm a little skeptical about a 4-bit improvement. Read the article (nov or dec 1995) or let me know if you cannot find it. Bye, Flavio Rizzardi spillo@maya.dei.unipd.it