Computer Printer made from a Typewriter

Chris Gregg made a an interesting Computer Printer made from a Typewriter, the typewriter is an old mechanical style and there is a bunch of electronics and solenoids attached to make the magic happen. The solenoids press the appropriate keys to type on the keyboard. One issue is that a microcontroller with enough outputs to drive this number of solenoids is not that common in the DIY space. Chris developed a custom shift register circuit that allows him to easily control all of the solenoids with just a few IO pins.

Thanks for the tip John.