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 ...

you can replace them with bigger LEDs or even a light bulb (paired with a relay for the Arduino Uno). Try a toggle switch instead, so you won't have to keep your hands on the push button.

The alarm only stops when you press the push button connected to the Arduino. For this setup ... the hardware for this setup is pretty minimal: a relay for the bulb, a resistor for the LDR ...

An Arduino Nano controls two relays which in turn can turn the car on, start it, and turn it off. Instead of adding a button for “push to start” he opted for a 13.56MHz RFID module.

[Facelesstech] programmed an Arduino Pro Micro to fake controller button presses. It starts with a couple of presses to identify itself to the Switch, before generating an endless stream of button ...