I apologize if this has been answered, I couldn't find any definitive answer.
I wanted to connect ultrasonic range sensor (based on this tutorial http://www.modmypi.com/blog/hc-sr04-ultrasonic-range-sensor-on-the-raspberry-pi) but here the author notes that you need some resistors to limit the 5V output the sensor is sending.
This info is kind of new to me and I didn't care when I was connecting previous sensors. Apparently PIR ones also send 5V outputs when they detect movements. I have been using those sensors for some time.
So the question basically is. Can Pi handle 5V input on GPIO pins or it could damage it? Thanks.
I have version 3 and also Zero.