> The first operational (read actually worked) ballistic rocket (read leaves > the atmosphere and returns) was of course the German V2, which was built by > Von Braun and many others. The guidance was a tube circuit that mixed (they > called it a mixing circuit) the gyro and vane position signals and generated > servo signals for positioning the vanes. I bet that we can get that to work > with a PIC. Possibly an 8 pin device. Mars is a bit more complicated, that > might be a bit tougher. But we certainly can loft a body to space with a > PIC. I bet that would be great PR. > > Chris Eddy I once held an Apollo flight computer in my hands. It was a pretty crude device - you keyed in the program by hand (had those big "arthritis" buttons, so it could be worked in a space suit). It was < 1K memory, so I'd say any pic except maybe a 12C508 would probably outrun it. Definitely they'd work faster. It was extremely solidly built - basicly they'd encapsulated the board, and that was in a milled aluminum case that form-fit the encapsulant. It was about 6" x 6" x 4", and felt like a solid aluminum block. If memory serves it was LCD screen. -- Anniepoo Need loco motors? http://www.idiom.com/~anniepoo/depot/motors.html