![3 GPIO Port Multifunction Extended RPI B+/2B/3B+/4B GPIO Expansion PCB Board for Raspberry pi 4b Pi 3 and Pi2 3 GPIO Port Multifunction Extended RPI B+/2B/3B+/4B GPIO Expansion PCB Board for Raspberry pi 4b Pi 3 and Pi2](https://m.media-amazon.com/images/I/615uGAzeeIL.jpg)
3 GPIO Port Multifunction Extended RPI B+/2B/3B+/4B GPIO Expansion PCB Board for Raspberry pi 4b Pi 3 and Pi2
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Raspberry Pi 4 GPIO Expansion Extension Board Screw Terminal Hat For Raspberry Pi 2B/3B/3B+/Zero/Zero W LED Matrix Display
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Introduction to Raspberry Pi 4 Pinout, Working, Pinout, Features & Applications - The Engineering Knowledge
![I rotated the raspberry pi 4's GPIO diagram by 180 degrees. Hope this helps someone. : r/raspberry_pi I rotated the raspberry pi 4's GPIO diagram by 180 degrees. Hope this helps someone. : r/raspberry_pi](https://preview.redd.it/a71h1fe0s5b71.png?width=640&crop=smart&auto=webp&s=a828fee03415f069c24b54d174e8f263a34a957a)