Hm. This might not be hard with modern digital typewriters, or at the least receipt printers. Electric typewriters have fairly standard keyboards, it wouldn't b

Hm. This might not be hard with modern digital typewriters, or at the least receipt printers. Electric typewriters have fairly standard keyboards, it wouldn't be too hard to put a transistor across the switches. Now, mechanical typewriters.... that could be tricky. You'd need some heavy modification and some strong motors or solenoids.