In the days when computers took up an entire room, a CRT monitor was a luxury. Most of the time, input and output was handled with a teletype – a typewriter connected directly to the computer. [Josh] wanted his own typewriter terminal, so he took apart an IBM Selectric II and got to work.
Instead of an electronic keyboard, the IBM Selectric II uses and electromechanical keyboard to tilt and rotate the Selectric’s typeball. In normal operation, a series of shafts underneath the keyboard are engaged. [Josh] added parts of an erector set to those levers and tied each one to one of 16 solenoids.
With a set of solenoids able to print any key with the help of an Arduino, [Josh] had a fully automated typewriter from the early 1970s. [Josh has been printing out a lot of ASCII art lately in preparation for the Kansas City Maker Faire later this month. You can check out the build videos after the break.