Raspberry Pi for Mere Mortals
The Raspberry Pi is a complete Linux computer the size of a deck of cards — from $15 to about $150 depending on the model. This guide compares every current model, tells you honestly which Pi fits which job, walks through headless setup (no monitor needed), and gives you first projects that actually teach something.
No CS degree required. Ideas first, then real commands.
What this guide covers
- What a Pi is — single-board computer vs microcontroller (Pi vs Pico — they're different beasts)
- The lineup — Pi 5, Pi 4, Pi 500, Zero 2 W, Pico, and Compute Modules compared spec-for-spec
- Which Pi for what — home server, AI tinkering, IoT sensors, desktop, learning Linux: matched to models
- Headless setup — flash, enable SSH, join Wi-Fi, first boot — no monitor, no keyboard
- Pi OS essentials —
raspi-config, updates, the 64-bit question - Your first projects — one project per model class, each teaching a real skill
- Troubleshooting — symptom → fix, eight ways
What it doesn't cover
Custom HAT design, industrial Compute Module carrier boards, and real-time bare-metal programming on the Pico (the Arduino guide covers the microcontroller mindset). This guide is about choosing and running a Pi.
How to use this guide
Specs were checked against Raspberry Pi's official documentation and multiple 2026 buying guides in October 2026. Prices are approximate and volatile — a DRAM shortage has pushed Pi prices up several times since late 2025, so treat every price as "check before buying." Check: blocks show verified output. Anything labeled illustrative says so.