● GPIO Headers: Pins to connect external devices like sensors and LEDs.
● ARM Processor (CPU): The brain that runs programs and executes instructions.
● RAM: Temporary memory for data and instructions the CPU is using.
● GPU: Handles graphics and video output for displays.
● Micro SD Card Slot: Holds the MicroSD card, which stores the operating system and files.
● USB/Ethernet Controller: Manages USB devices and wired internet connections.
● DSI Display Connector: Connects external displays using the DSI port.
● Self-Resetting Fuse: Protects the board from power surges by resetting after an overload.
The Raspberry Pi 4B is faster, has more RAM, USB 3.0, USB-C power, dual HDMI, Wi-Fi, Bluetooth,
and Gigabit Ethernet, while the Pi 2 is slower with fewer features.
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