History Of Raspberry Pi

What actually happened when the Raspberry Pi came together

The story starts at Cambridge University, where Eben Upton was teaching computer science undergraduates and noticing something frustrating. Incoming students in the 2000s were arriving with weaker programming backgrounds than students from ten years prior. The reason was straightforward: home computers had become expensive, and most kids didn't have access to machines where they could actually learn low-level computing. The Raspberry Pi Foundation was created in 2009 specifically to address that gap. Upton and a small group of colleagues at ARM and Broadcom designed a credit-card-sized computer that would sell for around thirty dollars, run Linux, and actually be useful for education. The original Raspberry Pi Model B shipped in February 2012 at thirty-five dollars. It had a BCM2835 SoC with a single-core ARM11 processor running at 700 megahertz, 256 megabytes of RAM, and it booted from an SD card. That single detail about SD card booting turned out to matter more than anyone on the core team realized at the time. SD cards are slow. Very slow. Read speeds on the original boards were roughly ten to fifteen megabytes per second, which meant any operation involving the filesystem felt sluggish by desktop standards. I ran into this directly when I was setting up a long-running automated data collection project on a Pi Model B rev 2. The system was supposed to log sensor readings every thirty seconds to a SQLite database on the SD card. After about three weeks, the card started showing signs of wear, and query times degraded noticeably. The workaround wasn't fancy. I moved the database to a USB-connected SSD using an OTG adapter, mounted the root filesystem on the SSD via a script in /etc/fstab, and kept only the boot partition on the SD card. Performance improved immediately, and the setup has been running without issues for over two years. If you're building something that writes frequently, don't assume the SD card route will hold up.

Model A came out shortly after the B in July 2012. It cut the price to twenty-five dollars by removing Ethernet, reducing RAM to 256 megabytes, and providing only one USB port. It was the right move for ultra-low-cost applications, but the single USB port made it nearly unusable for anything requiring both networking and a peripheral. Most people who bought a Model A ended up adding a USB hub, which erased the cost advantage anyway. The Model B+ arrived in July 2014 and was genuinely significant. Four USB ports, four GPIO pins added, a second camera connector, and a micro-SD slot replacing the full-size one. The board form factor shifted slightly too. This revision locked in the pin layout that would remain compatible for every Pi that followed, including the Pi 2, Pi 3, Pi 4, Pi 5, and the various Zero models. That backward compatibility is one reason the ecosystem survived and thrived when competitors like the ODROID line faded out. The Raspberry Pi 2 Model B launched in February 2015 with a quad-core Cortex-A7 and 1 gigabyte of RAM. It was roughly four to five times faster than the original Model B for most tasks. The Raspberry Pi 3 Model B followed in February 2016, adding built-in Wi-Fi and Bluetooth, which eliminated a whole category of dongle-related failures I dealt with regularly. The Pi 3B+ in 2018 added gigabit Ethernet over USB 2.0, which is fast enough for most real-world use cases even though it isn't true gigabit throughput.

The Pi 4 Model B in 2019 was the first board that felt like a legitimate desktop replacement for light work. Dual HDMI, up to 8 gigabytes of RAM, and USB 3.0 ports. I switched my main home server from an old Intel NUC to a Pi 4 with 8 gigabytes because the power draw is a fraction of what the NUC used, and the constant load cost practically nothing to run. The trade-off is that the Pi 4 doesn't handle sustained heavy CPU workloads well without active cooling. The BCM2711 throttles at around 80 degrees Celsius, so a heatsink and fan are necessary if you're compiling code or running virtual machines. The Raspberry Pi 5 came out in October 2023 with an BCM2712, an octa-core Cortex-A76, PCIe 2.0 interface, and dual micro-HDMI support. It's a meaningful generational leap, but it also introduced new failure modes. The board draws significantly more power, and the official USB-C power supply needs to deliver at least 5 volts at 3 amps. Using a phone charger that only outputs 1.5 amps causes undervoltage warnings and unpredictable behavior, especially when peripherals are attached. I learned this the hard way when a Pi 5 started dropping network connectivity randomly, and it turned out to be a power delivery issue from a marginally adequate charger. The Zero lineup deserves mention because it changed how people deploy these boards. The Zero launched in 2013, the Zero W in 2017 added wireless, and the Zero 2 W in 2021 put a quad-core chip inside the same tiny form factor. These are useful for embedded projects where size matters more than raw performance. I've used Zero W boards in weather monitoring stations and as headless media centers inside furniture. The Zero 2 W is the sweet spot if you need wireless and more processing power without giving up the small footprint.

Looking at the software side, Raspberry Pi OS used to be called Raspbian. It's a Debian-based distribution maintained by the foundation and the community. The recommended imaging tool is Raspberry Pi Imager, which handles OS selection, partition layout, and basic configuration. The OS supports both 32-bit and 64-bit kernels now, and the 64-bit version is the better choice for Pi 4 and Pi 5 boards because it gives access to more than 4 gigabytes of RAM and better memory management under load. One common mistake people make is treating the Raspberry Pi like a regular computer and then getting frustrated when it doesn't behave like one. The hardware is fixed. You can't upgrade the CPU or add more RAM. Storage choices matter enormously. A cheap SD card will fail faster than you expect in write-heavy scenarios. NVMe storage through the PCIe interface on the Pi 5 is genuinely fast, but it requires an HAT or adapter board and a separate power source for the drive in most cases. The Raspberry Pi Foundation has released over a hundred million boards since 2012, according to their public announcements. That volume sustained a massive third-party ecosystem of cases, HATs, displays, and accessories. It also meant that documentation and community support became extremely robust. For any problem you encounter, someone has probably already posted a solution online.

The board is still in production, and the foundation continues to release new models. The current lineup includes the Pi 5, Pi 4, Pi 3A+, and various Zero models. Pricing stays in the twenty to eighty dollar range depending on the board and configuration, which keeps it accessible for education and hobbyist projects.