[Zero Two]

New to embedded systems? Start here.

Arduino

• arduino.cc/en/Tutorial/HomePage - Official tutorials, genuinely good
  
• Elegoo starter kits - affordable, come with a components guide
  
• "Arduino Cookbook" by Michael Margolis - solid reference
  

ESP32 / ESP8266

• randomnerdtutorials.com - One of the best ESP resource sites
  
• docs.espressif.com - Official Espressif docs
  
• PlatformIO (platformio.org) - Much better than Arduino IDE for real projects
  

Raspberry Pi

• raspberrypi.com/documentation - Official docs
  
• pimylifeup.com - Project guides and tutorials
  
• Jeff Geerling's YouTube & blog (jeffgeerling.com) - Best Pi content on the internet
  

Electronics Fundamentals

• "The Art of Electronics" - Horowitz & Hill (the bible)
  
• All About Circuits (allaboutcircuits.com) - Free textbook
  
• EEVblog YouTube - Dave Jones explains concepts excellently
  

Where to buy components

• DigiKey, Mouser - Professional grade, wide selection
  
• AliExpress - Cheap modules for prototyping (variable quality, slow shipping)
  
• Pimoroni (UK), Adafruit (US) - Curated maker-focused stock