A Raspberry Pi is a compact, versatile computer. This introductory guide explains how it works, the product lines available, and what you should consider when choosing and getting started.
What is a Raspberry Pi?
In short: In its classic form, a Raspberry Pi is a single-board computer. The processor, RAM, and interfaces are located on a compact circuit board. Supplemented by a power supply, a boot medium, and the appropriate peripherals, it can function like a small Linux computer.
Unlike a ready-to-use office PC, a board is usually supplied without a case, monitor, keyboard, or mass storage. This makes the platform flexible: it can be configured as a learning computer, a control unit, a network service, or the basis for a prototype. However, "Raspberry Pi" now refers to an entire product family – including Pico microcontrollers and Compute Modules for custom hardware.
First, ask yourself: should the device run an operating system and multiple applications – or perform a clearly defined control task with low energy consumption? This distinction usually leads to the appropriate product line.
Why was the Raspberry Pi developed?
The Raspberry Pi Foundation was created with the educational goal of making it easier for young people to access computer science and digital design. The first Raspberry Pi computer was launched in 2012. Today, in addition to general-purpose computers, Raspberry Pi also develops microcontrollers, modules, and accessories for education, private projects, and professional applications.
The basic principle remains the same: an accessible, documented computer platform where learners and developers can not only use software but also understand how it interacts with hardware.
How does a Raspberry Pi work?
The heart of the classic models is a System-on-Chip, or SoC for short. This combines a processor based on Arm architecture – a common, energy-efficient processor architecture – with graphics and other functions. The RAM stores currently required data. An operating system is usually loaded from a microSD card, i.e., a small flash memory card; newer models support additional boot media depending on the specific model.
USB, video outputs, network, and wireless connectivity connect peripherals and infrastructure. Programs can read or switch electrical signals via GPIO ("General Purpose Input/Output"). This allows for the connection of sensors, relays, or expansion boards. A HAT ("Hardware Attached on Top") is an expansion board that is placed mechanically and electrically onto the designated connector. Compatibility and voltage levels must always be checked.
Single-board computers and microcontrollers: What is the difference?
| Feature | Single-board computer | Microcontroller board |
|---|---|---|
| Example | Raspberry Pi 4 or 5 | Raspberry Pi Pico 2 |
| Software | Typically Linux and multiple processes | A directly started program or lean runtime environment |
| Strengths | User interface, network services, data processing | Deterministic control, fast startup, low resource consumption |
| Typical task | Server, desktop, gateway, signage | Reading sensors, controlling motors or LEDs |
Both worlds can complement each other: a microcontroller records time-critical signals, while a Raspberry Pi computer stores, visualizes, or transfers data to a service.
Which Raspberry Pi product lines are available?
Classic Raspberry Pi computers
Boards like the Raspberry Pi 4 and Raspberry Pi 5 are universal Linux computers with network, USB, display, and GPIO interfaces. They are suitable for many learning, development, and server tasks.
Zero series
The Raspberry Pi Zero 2 W is particularly compact and includes wireless connectivity. Its lower performance and different connection formats make it interesting when space is more important than desktop comfort.
Pico series
The Raspberry Pi Pico and Pico 2 are microcontroller boards. They are intended for control, sensor, and embedded tasks and are programmed using, for example, C/C++ or MicroPython.
Compute Modules
A Compute Module is a compact computing module for integration onto your own carrier board. It is aimed at product development and embedded systems; design, I/O, and certification require additional planning.
Keyboard computers
Models like the Raspberry Pi 500 integrate the computer into a keyboard. For classroom, training, or a tidy desktop, you only need a display, a mouse, and – depending on what's included – accessories.
Overview of key current models
| Model / Family | Typical target group | Suitable applications | Performance class | Special features | Notes | abatec link |
|---|---|---|---|---|---|---|
| Raspberry Pi 5 | Beginners with room to grow, developers, companies | Desktop, development, services, signage, prototyping | high | Current classic generation, PCIe interface, RAM variants | Plan for a suitable power supply and load-dependent active cooling | View models |
| Raspberry Pi 4 Model B | Training, existing projects, standard services | Learning system, network services, automation | medium | Broad installed base, multiple RAM variants | Check software and accessory requirements on a per-project basis | Model overview |
| Raspberry Pi Zero 2 W | Developers with limited installation space | Compact IoT nodes, control, simple gateways | low | 65 × 30 mm, Wi-Fi/Bluetooth, unpopulated GPIO footprint | Less RAM, mini/micro connectors, soldering may be required depending on model | Check product range |
| Raspberry Pi Pico 2 / 2 W | Electronics, embedded development | Sensors, actuators, real-time-like control | microcontroller | RP2350; wireless only on W variant | Not a Linux computer; note variants and voltage levels | Check product range |
| Compute Module 5 | Product developers, OEM, industry | Customer-specific embedded systems | high | Variants for RAM, eMMC, and wireless | Plan carrier board, thermals, compliance, and lifecycle | Inquire about project requirements |
| Raspberry Pi 500 | Education, training, desktop users | Programming, office, and learning environment | high | Computer in keyboard case, integrated cooling | Not a substitute for a freely integrable board | Check product range |
The table categorizes product families and does not replace a product-specific compatibility check. Shop availability, variants, and prices are subject to change.
What can you do with a Raspberry Pi?
A Raspberry Pi combines standard computer functions with hardware-near interfaces. Consequently, the spectrum ranges from a classroom computer to the prototype of a networked machine. However, it is not automatically production-ready: the more critical the task, the more important availability, maintenance, and security concepts become.
Learning and programming
Python, Scratch, Linux, and network technology can be tested on a real system. Schools, universities, and training companies can set up standardized learning stations or laboratories.
Smart home and building automation
A Raspberry Pi can run automation software, bundle data, and process rules. Wireless standards, interfaces, data backup, and the consequences of a failure must be planned separately.
Server, network, and monitoring
Suitable for development services, status displays, monitoring, or internal test servers. For business-critical services, redundancy, updates, backups, and storage durability are crucial.
Media center and digital signage
With compatible software, the system can play media or supply displays. Resolution, codec support, continuous operation, and central management should be tested in advance.
Automation, sensors, and IoT
Sensor values can be recorded, processed locally, and passed on via a network. For robust field applications, suitable interfaces, level converters, protection, and housings are required.
Robotics and control projects
The computer can handle navigation, image processing, or a user interface. Motors must not be connected directly to GPIO pins; driver stages and separate power supplies are necessary.
Prototyping and industrial integration
Development teams validate software, operating concepts, and interfaces. For series products, Compute Modules are often more suitable because they are integrated onto a project-specific carrier board.
What do you need to get started?
- Suitable power supply: Connection, voltage, and power requirements must match the specific model and peripherals.
- Boot and storage medium: usually a suitable microSD card; USB or NVMe storage depending on the model and project.
- Case: protects against contact, short circuits, and mechanical stress.
- Cooling: for Raspberry Pi 5 and high continuous loads, a suitable active solution is particularly relevant; other models should also be evaluated depending on load and environment.
- Monitor, keyboard, and mouse: only necessary if the Pi is used locally as a desktop. Headless systems are managed via the network.
- Cables and accessories: video cables, network cables, card readers, HATs, or adapters must match the model.
Create a bill of materials consisting of the board, power supply, memory, case, cooling, and all adapters before ordering. Many failed starts are not caused by the board, but by an inadequate power supply or missing cables.
Which operating system is used?
Raspberry Pi OS is the official operating system based on Debian Linux and is recommended for most classic Raspberry Pi applications. The Raspberry Pi Imager writes the selected system to the boot medium and can, among other things, prepare the user account, network, and remote access.
For desktop use, there are variants with a graphical interface; for lean server and headless tasks, there is a Lite edition. Specialized systems can be useful if they support the specific model. Pico microcontrollers, on the other hand, do not use Raspberry Pi OS; they run firmware or a directly loaded program.
Which Raspberry Pi suits which use case?
- Define the task: Desktop, server, control, or integration into a product?
- Check software: Does the operating system support the model and the required applications?
- Determine interfaces: Network, wireless, USB, camera, display, GPIO, or PCIe?
- Dimension performance: Choose CPU, RAM, and storage based on real load, not just a blanket "bigger is better."
- Plan operation: Consider power supply, cooling, case, updates, backup, and a replacement strategy.
Compact decision guide
Universal entry and high reserves: Raspberry Pi 5. Proven environments and moderate tasks: Raspberry Pi 4. Very little space: Zero 2 W. Direct sensor/actuator control: Pico 2. Own carrier board or series product: Compute Module. Complete learning desktop: Raspberry Pi 500.
Limitations and points to check before purchasing
- Not an industrial PC by definition: Board, case, and accessories must meet temperature, humidity, EMC, and protection requirements.
- Storage is a wear part: Frequent write access can strain flash media; plan for logging, backup, and replacement.
- Compatibility depends on the model: Cases, power supplies, cables, HATs, and older images do not automatically fit across generations.
- GPIO is not fault-tolerant: Incorrect voltage or direct motor load can damage hardware.
- Cybersecurity and maintenance: Access credentials, updates, network segmentation, and responsibilities are part of the operating concept.
- Real-time and availability: A Linux system is not inherently suitable for hard real-time requirements or highly critical services.
Frequently asked questions about the Raspberry Pi
What is a Raspberry Pi, explained simply?
A Raspberry Pi is a compact computer on a single circuit board. With an operating system and a storage medium, it can execute programs, use networks, and address sensors or other hardware via its connections.
What can you do with a Raspberry Pi?
Typical tasks include programming and learning, smart home control, monitoring, small server services, digital signage, media centers, data acquisition, robotics, and prototyping. Whether a project is suitable depends on the model, accessories, software, and operating conditions.
Is a Raspberry Pi a complete computer?
The classic Raspberry Pi boards and keyboard computers are complete computers, but depending on the version, they still require a power supply, boot medium, and peripherals. The Raspberry Pi Pico, on the other hand, is a microcontroller board and not a Linux computer.
Which Raspberry Pi is suitable for beginners?
For a versatile start, a classic Raspberry Pi computer with well-documented accessories is usually the most sensible choice. The Raspberry Pi 5 offers high performance margins; the Raspberry Pi 4 may be suitable for proven, less demanding setups. The specific choice depends on software, connections, and budget.
Which operating system runs on a Raspberry Pi?
Raspberry Pi OS is the official operating system based on Debian Linux and is the obvious choice for most applications. Depending on the model and project, other compatible systems or specialized images may also be suitable.
Does a Raspberry Pi require a hard drive?
Not necessarily. Typically, a Raspberry Pi computer boots from a microSD card. Depending on the model, newer versions can also boot from USB, network, or NVMe storage connected via appropriate hardware. However, a boot medium containing an operating system is required.
What is the difference between Raspberry Pi and Raspberry Pi Pico?
Classic Raspberry Pi boards are computers that typically run an operating system like Linux. Pico boards are microcontrollers for real-time, resource-efficient control tasks; they start a program directly and do not replace a desktop or server computer.
Can a Raspberry Pi be used in a professional environment?
Yes, for example in development, training, prototyping, data acquisition, edge-related services, or as a basis for customized systems. For productive use, however, factors such as availability, maintenance, cybersecurity, storage durability, power supply, housing, temperature, and regulatory requirements must be evaluated.
Choose the right Raspberry Pi for your project
Compare the models currently available at abatec and then check the power supply, storage, cooling, and accessories for your specific application.
View Raspberry Pi models at abatec