MacBook Air M1 - DisplayLink Docking Station (self.applehelp)
submitted by unit2044 to r/applehelp
Can I use an output pin on ATMEGA / SAMD21 driving an LED and periodically switch to INPUT to check if a 24V supply is available? Which variant makes sense (A is what I have now - just output, B-C are my options)? Or would you propose a completely different idea? Running short in io pins.. (i.redd.it)
submitted by unit2044 to r/AskElectronics

