The Raspberry Pi 4B is a small, affordable computer designed for a variety of electronics projects and programming tasks. It features a quad-core ARM Cortex-A72 CPU, available in 2GB, 4GB, or 8GB RAM configurations, and offers various connectivity options including USB, HDMI, and Ethernet. This versatile device is widely used in educational settings, DIY projects, and professional applications.
Specification | Details |
---|---|
CPU | Quad-core ARM Cortex-A72 |
RAM | 2GB, 4GB, or 8GB LPDDR4 |
USB Ports | 2 x USB 3.0, 2 x USB 2.0 |
HDMI Ports | 2 x Micro HDMI (up to 4K resolution) |
Ethernet | Gigabit Ethernet |
Wireless | 802.11ac Wi-Fi, Bluetooth 5.0 |
GPIO Pins | 40-pin GPIO header |
Power Supply | 5V/3A via USB-C |
Storage | MicroSD card slot |
Video Output | Dual 4K display support |
Audio Output | 3.5mm audio jack, HDMI |
Pin Number | Name | Description |
---|---|---|
1 | 3.3V | 3.3V Power |
2 | 5V | 5V Power |
3 | GPIO2 | SDA1 (I2C) |
4 | 5V | 5V Power |
5 | GPIO3 | SCL1 (I2C) |
6 | GND | Ground |
7 | GPIO4 | General Purpose I/O |
8 | GPIO14 | TXD (UART) |
9 | GND | Ground |
10 | GPIO15 | RXD (UART) |
11 | GPIO17 | General Purpose I/O |
12 | GPIO18 | General Purpose I/O |
13 | GPIO27 | General Purpose I/O |
14 | GND | Ground |
15 | GPIO22 | General Purpose I/O |
16 | GPIO23 | General Purpose I/O |
17 | 3.3V | 3.3V Power |
18 | GPIO24 | General Purpose I/O |
19 | GPIO10 | MOSI (SPI) |
20 | GND | Ground |
21 | GPIO9 | MISO (SPI) |
22 | GPIO25 | General Purpose I/O |
23 | GPIO11 | SCLK (SPI) |
24 | GPIO8 | CE0 (SPI) |
25 | GND | Ground |
26 | GPIO7 | CE1 (SPI) |
27 | ID_SD | ID EEPROM |
28 | ID_SC | ID EEPROM |
29 | GPIO5 | General Purpose I/O |
30 | GND | Ground |
31 | GPIO6 | General Purpose I/O |
32 | GPIO12 | General Purpose I/O |
33 | GPIO13 | General Purpose I/O |
34 | GND | Ground |
35 | GPIO19 | General Purpose I/O |
36 | GPIO16 | General Purpose I/O |
37 | GPIO26 | General Purpose I/O |
38 | GPIO20 | General Purpose I/O |
39 | GND | Ground |
40 | GPIO21 | General Purpose I/O |
Power Supply:
Connecting Peripherals:
GPIO Usage:
Networking:
No Display Output:
Power Issues:
Overheating:
Network Connectivity Problems:
Q1: Can I use any microSD card with the Raspberry Pi 4B?
Q2: How do I enable SSH on the Raspberry Pi 4B?
ssh
(without any extension) in the boot partition of the microSD card. This will enable SSH on boot.Q3: Can I connect multiple displays to the Raspberry Pi 4B?
Q4: How do I update the operating system?
sudo apt update
sudo apt full-upgrade
Q5: Is the Raspberry Pi 4B compatible with Arduino?
Here is an example of how to control an LED connected to GPIO pin 17 using Python:
import RPi.GPIO as GPIO
import time
GPIO.setmode(GPIO.BCM)
GPIO.setup(17, GPIO.OUT)
try: while True: GPIO.output(17, GPIO.HIGH) # Turn on the LED time.sleep(1) # Wait for 1 second GPIO.output(17, GPIO.LOW) # Turn off the LED time.sleep(1) # Wait for 1 second except KeyboardInterrupt: pass finally: GPIO.cleanup() # Clean up GPIO settings
This code will blink an LED connected to GPIO pin 17 on and off every second. Make sure to install the RPi.GPIO library using the following command:
```sh
sudo apt install python3-rpi.gpio
This documentation provides a comprehensive guide to using the Raspberry Pi 4B, covering its technical specifications, usage instructions, and troubleshooting tips. Whether you are a beginner or an experienced user, this guide will help you make the most of your Raspberry Pi 4B.