Super basic electronics lesson: if you have an input on being monitored, it must have something connected to it. Connect the pin to earth and you'll see that everything is fine.
The IRLB3034 may work better? https://www.infine[…]
@D0nny94 As for the tachometer. If you do ne[…]
Thanks Eric for pointing me to that one, basical[…]
... Thanks for picking this up - some good wo[…]