Introduction
What is a Raspberry Pi for? We’re not talking about a tasty fruit pie with a flaky crust. Instead, we mean one of the most groundbreaking pieces of hardware in modern technology.
At its core, a Raspberry Pi is a single-board computer (SBC). Smaller than a standard deck of playing cards, it packs a microprocessor, RAM, graphics, wireless connectivity, and USB ports onto a single circuit board. Unlike classic desktop PCs that cost hundreds of dollars and have bulky cases, the Raspberry Pi gives you raw, flexible computing power at a fraction of the cost.
The Raspberry Pi Foundation, started by Eben Upton in Cambridge, UK, launched the first board in 2012 to inspire students to learn computer science and programming. (Upton, 2012) Now, with over 40 million sold worldwide, the Pi has grown from a teaching tool into the main choice for DIY smart homes, network servers, retro arcade consoles, and edge computing. (Pounder, 2024)
If you want to build a quiet home media server, control smart devices, or learn to code, knowing what a Raspberry Pi can do is the first step to creating your own custom tech setup.
Table of Contents
The Evolution of Raspberry Pi Hardware
To see what you can build with a Pi, it’s useful to look at how much the hardware has improved. It began as a simple 700MHz single-core board and has become a powerful 64-bit desktop replacement.
The first generation PI (model B) was released in 2012 and started a craze that will take the world by storm. The creators thought they might sell 1,000 units, but now they have sold over 40 million! In March of 2020 (one single month), they shipped an astonishing 640,000 units.
The following table will show you how the different PI hardware compares
| Generation | Processor | Architecture | Standout Feature |
|---|---|---|---|
| Raspberry Pi 1 | Broadcom BCM2835 | 32-bit | The original $35 credit-card computer |
| Raspberry Pi 2 | Broadcom BCM2836 | 32-bit | Upgraded to Quad-Core processing |
| Raspberry Pi Zero / W | Broadcom BCM2835 | 32-bit | Ultra-tiny form factor for tiny IoT projects |
| Raspberry Pi 3 | Broadcom BCM2710 | 64-bit | Integrated Wi-Fi and Bluetooth on-board |
| Raspberry Pi 4 | Broadcom BCM2711 | 64-bit | Dual 4K output, USB 3.0, up to 8GB RAM |
| Raspberry Pi 5 | Broadcom BCM2712 | 64-bit | PCIe interface, active cooling headers, up to 2.4GHz quad-core speeds |
So what can you do with one of these PI’s? Well, the sky’s the limit; for some, it’s building electronic circuits and using them in robots.
Part of the PI’s strength is the built-in row of connectors called the GPIO (General Purpose Input/Output) that can be wired into circuits to complete projects. A user can make the PI do things by writing code to control the sensors, motors, and lights.
Such add-ons devices fall into one of two categories: input, for instance, the PI camera, or output, for example, LED lights.
I am only scratching the surface of the number of components the PI can have connected. One of the most famous Pi projects to the play old style games, Called RetroPie.
What Components Can You Connect?
A Raspberry Pi has a 40-pin GPIO (General Purpose Input/Output) header, which is different from regular desktop computers. These pins let you connect directly to physical electronics:
High-Speed Peripherals: On newer boards like the Pi 5, built-in PCIe connectors let you add fast NVMe SSD drives and special NPU (Neural Processing Unit) acceleration HATs.
Sensors (Input): Connect cameras, temperature monitors, motion detectors, and distance sensors.
Actuators (Output): Control relays, motor drivers, LED arrays, and displays.
Raspberry Pi Operating Systems & Software
To get your Pi up and running, you need to install an operating system on a microSD card or an NVMe SSD.
The official operating system is Raspberry Pi OS (which used to be called Raspbian). It’s based on Debian Linux and gives you a lightweight desktop made for ARM processors. Since Linux is open-source, you get thousands of free software programs right away, from office suites to programming IDEs.
Over the years, Raspberry Pi OS releases have kept pace with upstream Debian updates, progressing from Buster and Bullseye to modern Bookworm releases. Depending on your project goals, you can also run specialized operating systems, such as Ubuntu or Home Assistant OS, or specialized emulation distributions.
(If you aren’t sure which build fits your hardware setup, check out our full breakdown on choosing the right Raspberry Pi operating system.)
The world has seen such an explosive growth with all things Raspberry PI; countless clubs have sprung up uniquely called Raspberry PI Jams.
5 Practical Uses for a Raspberry Pi Today
1. Learning to Code & Software Development
he Raspberry Pi was designed from day one to encourage hands-on programming. Python comes pre-installed, making it easy to write scripts that interact with web APIs or control physical hardware pins. If you’re completely new to programming, exploring the best Raspberry Pi programming languages will give you a clear roadmap to get started.
2. Retro Gaming & Console Emulation
One of the most enjoyable projects for hardware enthusiasts is turning a Raspberry Pi into a retro gaming arcade. By installing dedicated emulation software, a single Pi board can run classic games from the NES, SNES, Genesis, and arcade cabinets, as well as PlayStation games. You can dive deeper into setting up your own system in our guide to building a retro gaming arcade with RetroPie.
3. Network Security & Smart Home Hubs
A Pi uses very little power, often less than 5 to 10 watts, so it’s perfect for running as a home server all day and night. Some popular network uses are:
- Network-Wide Ad Blocking: Running Pi-hole to block ads and trackers across every device on your Wi-Fi network.
- Home Automation: Hosting Home Assistant to unify smart bulbs, sensors, and switches without relying on cloud servers.
4. DIY Hardware & IoT Prototyping
Whether you want to build a self-watering plant system, a weather station, or a custom robot, the GPIO header lets you turn software into physical action. It’s even widely used in 3D printing to host OctoPrint or Klipper servers for wireless printer monitoring.
5. AI at the Edge & Modern Benchmarking
Thanks to the Raspberry Pi 5’s extra power, you can now use it for local machine learning. With official AI HATs powered by Hailo-8L neural processors, a Pi can handle real-time computer vision, object detection, and local AI tasks right at your desk, without sending data to outside cloud servers.
Coming Soon: I am currently putting together an extensive, hands-on complete guide to the Raspberry Pi 5—covering hardware setup, active cooling, NVMe boot speeds, and edge AI benchmarks. Stay tuned to the blog for the full breakdown!
As mentioned before the potential for projects is boundless, a few more examples of projects can be summarized here.
Final Thoughts
The Raspberry Pi is still one of the most versatile and affordable tools for tech fans, makers, and anyone who loves to learn. Even as supply chains recover from the chip shortage, the Pi community stays active, creating new software, AI features, and hardware add-ons every day.
If you have a spare microSD card and a curiosity for building your own tech solutions, picking up a Raspberry Pi is the ideal gateway project.
Nature Bytes – Wildlife Camera