The standard floppy bus is open collector with termination (pull-up resistors) at the far receiving end. The terminations on older 5.25- and 8-inch drives can be as strong as 150 ohms. It is also ...

All it takes is an Arduino, three resistors, and three thermistors ... All is open-source — breadboard it, flash it. You can even add more thermistors to the mix if you’d like!