Practical Raspberry Pi & Arduino guides — from someone who's actually fried a few boards
No affiliate-farm fluff. Just wiring that works, mistakes worth avoiding, and a free tool to plan your pins before you plug anything in.
🔌 PinTinker — the pin conflict planner
Pick the sensors and modules you're using, and instantly see which GPIO pins to wire them to — with conflicts and voltage issues flagged before you touch a breadboard.
📘 Guides
Short, practical write-ups on wiring, power, and the mistakes that actually cause dead boards — not just theory.
Start here
- Your first Arduino project — blink an LED, and understand why the resistor matters.
- What's in a starter kit — every component explained in plain language.
- What to buy for a home bench — and what you can safely skip.
- Fixing Pi SD card corruption — the four real causes.
- I2C device not showing up? — seven checks, cheapest first.
- How to read a datasheet — the five sections that matter.
- Which microcontroller to buy — ESP32, Pico or Uno.
- Pull-up resistors explained — what a floating pin really is.
- Arduino INPUT_PULLUP — why your button logic is backwards.
- Picking a resistor value — four jobs, four calculations.
Why this site exists
Most "top 10 Raspberry Pi sensors" posts are written by people who've never actually wired one up. This site is written by someone who spent years as an electronics technician — the goal is to save you from the mistakes that actually kill boards and sensors, not just repeat a spec sheet.