It goes both ways. The pins are source/sink which means they can push power out or take power indamaru wrote:So the GPIO 5v is for voltage coming in to feed the pi ?
I was under the impression that the 5v pin was to feed some other device attached to the pi -
But if that's the case it would be really simple to attach the power pack to this board!
Nope there's no programming that needs to be done.damaru wrote:do I need to program anything to tell the gpio to receive 5 volt from the pin ? My mind has a hard time comprehending how a pin could accept or give you 5v -
Just to throw a spanner in the works, all outside taps (faucets) in the UK should be fitted with a non-return valve which would leave your plumber scratching his head.abishur wrote: ..........................................Imagine you have a faucet. Now a faucet doesn't have anything that says water has to flow a certain direction. It's just a valve and as you open it water flows through that valve. Most people use a faucet to send water from a city supply line into their yard or flower bed. It's a water source, this would be people who use the usb power port to send 5 volt wherever it's needed (like out the pins in the GPIO strip).
On the other hand you have a plumber whose trying to find a leak in your pipes. He disconnects the water from the city and uses your faucet to pressurize the system with water and listen for where the water is leaking out. The faucet still doesn't care which way the water is going, but this time water is flowing into it rather than out of it. This is called a "sink" (so many puns, so little time). On the pi this is the group of people who wants to use their own voltage protection (or worse, no voltage protection) and feed it into the pins on the GPIO strip.
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