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CaptainBobSim / The-Cessna-172-Project-V3

The Cessna 172 Project brings hardcore flight simulation to more people - to help others find this wonderful hobby, and enjoy it!
https://captainbobsim.com
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Pin 13 Strange behavior #446

Closed CaptainBobSim closed 3 months ago

oOblik commented 5 months ago

This is a known thing https://docs.arduino.cc/learn/microcontrollers/digital-pins/

Digital pin 13 is harder to use as a digital input than the other digital pins because it has an LED and resistor attached to it that's soldered to the board on most boards. If you enable its internal 20k pull-up resistor, it will hang at around 1.7V instead of the expected 5V because the onboard LED and series resistor pull the voltage level down, meaning it always returns LOW. If you must use pin 13 as a digital input, set its pinMode() to INPUT and use an external pull down resistor.

CaptainBobSim commented 3 months ago

This has been fixed with the redesigned Breakout Board System (V2.0)