UNC "Python" connector for up to 5 buttons on a parallel port

This lets you connect up to five buttons on a parallel port, using the "sense" lines to red the buttons. Its use is deprecated (use the TNG3 instead). UNC makes no claims to the fitness of this circuit for any purpose. We make no claims to the safety of this circuit (there is no overvoltage protection, for example, and it may blow out your parallel controller or motherboard). It is provided here for documentation purposes internal to UNC only.