I’ve been playing around with some Arduino microcontrollers, mainly the Arduino Mega 2560. They are fairly inexpensive controllers, that when programmed, can handle a large variety of tasks. These vary from simple leds being turned on, servos activated, audio played, or basically anything you can think of. In this simple setup, I wanted to use a blue led to simulate a welder for a few seconds. I added a push button to start the loop. Check out the full video inside.