Thanks, those documents have helped me understand the GPIO functions a lot more. What is the actual voltage of the output pin when I tell it to go High? Is it 3.3v or 5v? If I have it tied to a 5v relay will it actually be 3.3 v and the relay will consider it a high. Will I hurt the output pin if I ...

Hello, I am a newbe to the Raspberry pi and very interested in using the GPIO of the pi. I am looking at using the GPIO to drive 5v relays. I have read the pins are set to 3.3 and 5v will hurt the chip. I am thinking that all inputs should be tied to 3.3v pin but outputs tied to the 5v pins draw fro...