Plug the RFID module into the breadboard with enough space around it. Connect the VCC pin to the Arduino's 3.3V (not 5V), and ...

This DIY gas leakage detector is designed for educational and basic monitoring purposes. For critical safety applications, ...

As for the project page itself, each comes with detailed information ... you can build circuits from scratch using three popular Arduino boards — Uno, Nano, and Mega — and any of the 50 ...

it’s great for a quick-and-dirty circuit diagrams. Not exactly schematics, but [Duckman] has some Arduino pinout diagrams he made using ASCII-art. These could be useful when pasted into source ...