Pinout.xyz
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Raspberry Pi GPIO Pinout
Pin 1 is the only pin with a square solder pad, which may only be visible from the underside of your Pi. If you orient your Pi such that you are looking at the top with the GPIO on the right and HDMI port(s) on the left, your orientation will ...
Vilros
vilros.com › pages › raspberry-pi-4-pinout
Raspberry Pi 4 Pinout – Vilros.com
The Raspberry Pi 4 has a 40-pin GPIO (General Purpose Input/Output) header that lets you connect the Pi to the physical world.
Connector for Raspberry PI 4
Hi, if you would like to read the original content of this message, kindly drop me a private message! More on reddit.com
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January 28, 2023Connector Board for Raspberry Pi 4 & 5 (Open Source)
Awesome! The port distribution on every side of the Raspberry Pi is one of the worst legacies from version 1. I hope one day they decide to change the way you repurpose. More on reddit.com
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July 29, 2025How to access GPIO on a PI 4 when using a PiHat that covers all 40 GPIO pins
You may find the board on Pinout.xyz as Seeed are often weak on documentation for anything but their 'Grove' system. If it has a free Grove connector you do have I2C access through that. If you are feeling skilled enough you can alway solder to the reverse of the Pi but a short can leave you with a dead PI or no working GPIO pins... One of the most useful boards I have found is the HAT Hacker - even though it has 'Pico' in the name it is actually for the Linux Pi boards not the Microcontroller (wish they would rename the darn thing TBH). You just have to be careful soldering it to the pins (too much and HATs do not sit down) Or you can use a long pin header and slot that onto the Pi pins and put the hacker on to them - bit tall for my liking though. More on reddit.com
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March 9, 2023Raspberry PI 4 PWM?
On the Pi 4B and 400 (and CM4) you have two pairs of PWM channels. Those are: PWM0_0 available on GPIO 12, 18 or 52. PWM0_1 available on GPIO 13, 19, 45 or 53 PWM1_0 available on GPIO 40 PWM1_1 available on GPIO 41 Only GPIOs 12, 13, 18 and 19 are brought out to the 40-pin header. So you really only have two PWMs usable More on reddit.com
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January 13, 2023Can you power a Raspberry Pi 4 with GPIO pins?
No, you can not power a R-Pi 4 using any of the 28 GPIO pins. But, it's possible to power it using the 5V and GND pins of the GPIO header.
etechnophiles.com
etechnophiles.com › raspberry-pi-4-gpio-pinout-specifications-and-schematic
Raspberry Pi 4 GPIO Pinout & Specifications (Updated)
What is the purpose of GPIO in Raspberry Pi 4?
The GPIO pins are used to connect external components like sensors, actuators, displays, etc. with the SoC.
etechnophiles.com
etechnophiles.com › raspberry-pi-4-gpio-pinout-specifications-and-schematic
Raspberry Pi 4 GPIO Pinout & Specifications (Updated)
How many GPIOs does Raspberry Pi 4 have?
R-Pi has a 40-pin header out of which 28 pins are GPIO pins.
etechnophiles.com
etechnophiles.com › raspberry-pi-4-gpio-pinout-specifications-and-schematic
Raspberry Pi 4 GPIO Pinout & Specifications (Updated)
Videos
10:47
You NEED to Learn Raspberry Pi GPIO Pins (Beginner to Pro) - YouTube
07:42
Raspberry Pi 4: Using an Input Pin to Control an Output Pin - YouTube
16:07
GPIO Explained! How Raspberry Pi Talks to the Real World - YouTube
Raspberry Pi LESSON 4 : Understanding and Using GPIO Pins
09:38
Raspberry Pi 4 GPIO Pins & Controlling LEDs for Beginners - YouTube
04:35
Raspberry Pi GPIO: A Beginner’s Guide (2025) - YouTube
Raspberry Pi Forums
forums.raspberrypi.com › board index › community › general discussion
What are the 4 pins for? - Raspberry Pi Forums
Welcome to the Raspberry Pi forums. From: https://www.raspberrypi.org/blog/raspbe ... ale-now-35 · We use a magjack that supports Power over Ethernet (PoE), and bring the relevant signals to a new 4-pin header.
The Robotics Back-End
roboticsbackend.com › home › raspberry pi 4 pins – complete practical guide
Raspberry Pi 4 Pins - Complete Practical Guide - The Robotics Back-End
September 28, 2021 - The pins 27 and 28 are reserved pins. They are usually used for I2C communication with an EEPROM. If you just begin with Raspberry Pi 4 pins, just don’t connect anything to those pins.
YoungWonks
youngwonks.com › blog › Raspberry-Pi-4-Pinout
A look at the GPIO pins on a Raspberry Pi
December 17, 2020 - A Raspberry Pi 4 board has 40 pins on it. Among these pins, we have four power pins on the Raspberry Pi, two of which are 5v pins and another two are 3.3v pins. The 5v power pins are connected directly to the Raspberry Pi's power input and we ...
Wevolver
wevolver.com › article › raspberry-pi-4-pinout-a-comprehensive-guide-for-engineers
Raspberry Pi 4 Pinout: A Comprehensive Guide for Engineers
December 5, 2025 - Its combination of a powerful ... electronics students. One of its most significant features is its 40‑pin General‑Purpose Input/Output (GPIO) header, commonly referred to as the Raspberry Pi 4 pinout....
Richardelectronics
richardelectronics.com › blog › projects › raspberry › raspberry-pi-4-pinout-specs-datasheet-projects
Raspberry Pi 4: Pinout, Specs, Datasheet & Projects - Richard
December 2, 2024 - In this, I’m going to discuss Pi 4’s introduction, datasheet, features, pinouts, specifications, and applications. Moreover, this article will be very helpful for you and it adds more interesting information to your mind.
Etechnophiles
etechnophiles.com › raspberry-pi-4-gpio-pinout-specifications-and-schematic
Raspberry Pi 4 GPIO Pinout & Specifications (Updated)
November 17, 2025 - Raspberry Pi 4 GPIO Pinout has 40 pins: 26 GPIO pins, two 5V pins, two 3V3 pins, and 7 ground pins (0V). Board supports SPI, I2C, UART protocols.
Maker Pro
maker.pro › raspberry-pi › tutorial › raspberry-pi-4-gpio-pinout
Raspberry Pi 4 GPIO Pinout | Raspberry Pi | Maker Pro
July 10, 2019 - While the standard pinout for all 40-pin Raspberry Pis has remained the same, you can find an updated list of pin functions for the Raspberry Pi 4 at the official raspi-gpio repository.
Raspberry Pi
raspberrypi.com › documentation › computers › raspberry-pi.html
Raspberry Pi computer hardware - Raspberry Pi Documentation
For Raspberry Pi 5, use one of the official fan options: ... Both of the Raspberry Pi 5 fan options plug into the four-pin JST-SH PWM fan connector located in the upper right of the board between the 40-pin GPIO header and the USB 2 ports.
Pi4J
pi4j.com › 1.3 › pins › rpi-cm4.html
The Pi4J Project – Pin Numbering - Raspberry Pi Compute Module 4 (CM4)
Please see this page for more ... board contains a single 40-pin expansion header labeled as 'J8' pr 'RaspberryPi HAT' providing access to 28 unique GPIO pins.\...
element14 Community
community.element14.com › products › raspberry-pi › w › documents › 4317 › raspberry-pi-4-model-b-default-gpio-pinout-with-poe-header
Raspberry Pi 4 Model B Default GPIO Pinout with PoE Header - element14 Community
Here is the Raspberry Pi 4 default GPIO pinout for the 40 pin J8 header. This is the configuration of the pins as you'll receive it when you first boot up Raspbian, or NOOBS with Raspbian. However, did you know that they are configurable?
Raspberry Pi Forums
forums.raspberrypi.com › board index › using the raspberry pi › advanced users
Can Pi 4 be powered through GPIO pins? - Raspberry Pi Forums
Fri Jul 03, 2020 2:43 pm Yes, you can still power the Raspberry Pi 4 from pins on the GPIO header. Supply a well-regulated 5V to pins 2 and 4, and ground to pin 6. Be very careful, however not to accidentally apply 5V to any of the other pins, as the I/Os are intended for 3.3V operation.
SparkFun Learn
learn.sparkfun.com › tutorials › introduction-to-the-raspberry-pi-gpio-and-physical-computing › gpio-pins-overview
Introduction to the Raspberry Pi GPIO and Physical Computing - SparkFun Learn
It also has a Broadcom SOC channel (BCM) name. By opening the terminal and running pinout as a command, it will return a map of the Raspberry Pi GPIO pins and their names based on the Broadcom chip on board. Map for the Raspberry Pi 4 based on the pinout command.
Pinout
pinout.xyz › pinout › pin7_gpio4
GPIO 4 at Raspberry Pi GPIO Pinout
Orientate your Pi with the GPIO on the right and the HDMI port(s) on the left. ... Support Pinout! Use code "pinout" for, $10 off $30 at PCBWay Limited to 50 redemptions, one per account.
Microcontrollers Lab
microcontrollerslab.com › home › electronics components › raspberry pi 4 pinout, features and peripherals
Raspberry Pi 4 Pinout Description, Features, Peripherals , Applications
December 2, 2025 - The Raspberry Pi 4 can be used in the external embedded system to communicate. It has a total of 40 pins from which 28 are GPIO pins and the rest of them are power pins. GPIO pins don’t only perform the simple I/O functions.
Pi4J
pi4j.com › 1.4 › pins › rpi-4b.html
The Pi4J Project – Pin Numbering - Raspberry Pi 4B
Please see this page for more information on both the WiringPi and Broadcom pin numbering schemes: >> Pin Numbering Schemes · The Raspberry Pi 4B board contains a single 40-pin expansion header labeled as 'J8' providing access to 28 unique GPIO pins.
Top Tech Boy
toptechboy.com › understanding-raspberry-pi-4-gpio-pinouts
Understanding Raspberry Pi 4 GPIO Pinouts | Technology Tutorials
March 31, 2022 - This shows the pinout for the Raspberry Pi 4. It shows both the BOARD numbering scheme, and the BCM numbering scheme. You define which numbering scheme you want to use in your python program.
Raspberry Pi
projects.raspberrypi.org › en › projects › physical-computing › 1
GPIO pins - Physical Computing with Python
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Raspberry Pi Forums
forums.raspberrypi.com › board index › using the raspberry pi › beginners
GPIO pins for raspberry pi 4 - Raspberry Pi Forums
The RPI4 has the exact same GPIO pinout as the RPI3 but if you need them, there are a number of new hardware peripheral drivers that can be assigned to GPIO's not many people use them yet, so there is not much info about them, but In addition to the legacy peripherals we have: 4 new PL011 UARTs ...