The VIC-20 was an early 1980’s home computer. It had a 5V supply bus which happens to be the same as that used for radio control servos for models.
“Continue reading” for more details and photos.
Servos are set to a degree of rotation by a 1.0 to 2.0 mS pulse which could be programmed by the computer using a machine code subroutine for speed. By combining 3 of these servos it was possible to make a printer / plotter and still have a massive 1.5 k of memory left over to program it to do patterns. It was published in an Electronics Today International magazine in 1984. I was a bit niftier with the maths in those days.
Related pages
Try something else
External links
Photo Date: 1984