Any of the gpio pins can be designated in software as an input or output pin and used for a wide range of purposes.
Raspberry pi 3 b fan pins.
The raspberry pi has two i2c connections at gpio 2 and 3 sda and scl are for i2c0 master and physical pins 27 and 28 are i2c pins that enable the pi to talk to compatible hat hardware.
Pinout also includes dozens of pinouts for raspberry pi add on boards hats and phats.
I don t know why every video i found on this either was 5 minutes long and never actually plugged the fan into.
Gpio header power pins.
The header provides 5v on pin 2 and 3 3v on pin 1.
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This gpio pinout is an interactive reference to the raspberry pi gpio pins and a guide to the raspberry pi s gpio interfaces.
The raspberry pi gpio pinout guide.
Using this approach the fan will run all the time i think it is much more i.
In order to avoid damaging your pi you need to be sure what pins you are connecting to other hardware and that your program is referring to the correct pins.
Control a cooling fan on a raspberry pi 3.
Add a fan to a raspberry pi 3 with control to turn it on and off as required an easy way to add a fan is to simply connect the fan leads to a 3 3v or 5v pin and to ground.
Prior to the pi 1 model b 2014 boards comprised a shorter 26 pin header.
The older iterations of the rpi such as the raspberry pi model b will only contain a total of 26pins.
A 40 pin gpio header is found on all current raspberry pi boards unpopulated on pi zero and pi zero w.
The 3 3v supply is limited to 50ma.
How to wire a cooling fan on a raspberry pi 3.
If you re using the raspberry pi b 2 zero 3 or the latest raspberry pi 4 model b you ll discover that your board have a total of 40 gpio pins.
