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 ...

PIC, AVR, and Arduino are ubiquitous in projects these ... Instead of going with a microcontroller he built the circuit around a 555 timer. What he really needed in this case is a flip-flop ...

Did you know that you can use Arduino to turn on an LED when you press a button? Well, it is true, you can do this! Leaving the joke aside, let me show how you can achieve this. You will need the ...

[Ed] was tasked with adding push-button degaussing to an ... decoupling cap to power the new deguassing circuit and connected the SSR to the Arduino as an open collector input.