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 ...

[Jason] really wanted to build an RFID controlled garage door opener ... Whenever a valid key is swiped, the Arduino triggers a relay which can then be used to control just about anything.

Padow] put together an Arduino Uno, SD card, four line character LCD ... monochrome display. Just like decades past, this implementation of BASIC has you start each line of code with a line ...