Trying to use the raspberry pi to control an Arduino Uno and I'm tyring to ensure nothing breaks when connecting them. I know that the Arduino outputs at 5V while the pi inputs at 3.3V. This requires resistors to decrease the voltage.
What about the other way around? I would like the pi to output a digital signal to the Arduino to have a function run. Common sense suggests that this shouldn't be a problem but I want to make sure that is the case.