What's the difference between Raspberry Pi 4 and Raspberry Pi Pico?

Main difference

The most important difference: Raspberry Pi 4 is a full computer, while Raspberry Pi Pico is a microcontroller.

• Raspberry Pi 4: Runs a full operating system (Linux/Raspberry Pi OS), connects to monitors/keyboards/mice, browses the internet, and runs multiple applications simultaneously
• Raspberry Pi Pico: Runs small programs directly on the chip (no operating system), designed to control electronics (LEDs, sensors, motors), and must be programmed from a computer

Think of Pi 4 as a desktop computer, and Pico as a programmable chip—similar to how Arduino works.

Raspberry Pi 4

Raspberry Pi 4 is a single-board computer that can replace a basic desktop PC for many tasks.

Key features

• Processor: Quad-core ARM Cortex-A72 @ 1.5GHz
• Memory: 1GB, 2GB, 4GB, or 8GB RAM
• Operating system: Runs Raspberry Pi OS (Linux), Ubuntu, or other full OSes
• Display: Dual micro-HDMI ports for 4K displays
• USB ports: 2× USB 3.0, 2× USB 2.0
• Networking: Gigabit Ethernet, Wi-Fi, Bluetooth
• Storage: microSD card (acts as hard drive)
• Power: 5V/3A USB-C power supply

What you can do with Pi 4

• Desktop computing (web browsing, office apps, coding)
• Media centers (Kodi, Plex)
• Servers (web, file, VPN, DNS filtering)
• Retro gaming (RetroPie emulation)
• Home automation (Home Assistant)
• Learning to code (Python, Scratch, JavaScript)

Raspberry Pi Pico

Raspberry Pi Pico is a microcontroller board—a tiny, low-power computer designed to control hardware.

Key features

• Processor: Dual-core ARM Cortex-M0+ @ 133MHz (RP2040 chip)
• Memory: 264KB RAM, 2MB flash storage
• Operating system: None—runs code directly on the chip
• No HDMI: No video output; no monitor connection
• No USB peripherals: No keyboard/mouse ports
• Programming: Write code on a computer, upload to Pico via USB
• GPIO: 26 GPIO pins for sensors, LEDs, motors
• Power: 2–3 AA batteries or USB power (very low power consumption)

What you can do with Pico

• Blink LEDs and control lights
• Read sensors (temperature, motion, distance)
• Control motors and servos
• Build simple robots
• Create wearable electronics
• Real-time automation and control

Side-by-side comparison

Which should you choose?

Choose Raspberry Pi 4 if you want to:

• Learn to code on a full computer
• Browse the internet, watch videos, or use apps
• Run servers, automation systems, or complex software
• Build media centers or retro gaming systems
• Need USB peripherals, HDMI displays, and networking

Choose Raspberry Pi Pico if you want to:

• Control LEDs, sensors, and motors directly
• Build electronics projects with low power consumption
• Learn about microcontrollers and embedded programming
• Create wearables, robots, or simple automation
• Start with a very low-cost option ($4)

Can they work together?

Yes! Many projects use a Raspberry Pi 4 as the "brain" (running complex software) and Pico as the "hands" (controlling hardware). For example, a Pi 4 could run a web interface while a Pico controls motors and reads sensors.