Saturday, November 5, 2016

Arduino Model Railroading - Arc Welder Flash

The guys at the Charleston Model Railroad Club asked for a simulated flash of an arc welder. A $4 (was $2.50, price went up since we purchased) arduino nano clone, a 130 ohm resistor, and a white LED later, they have their arc welder. This is a fun and inexpensive project that adds to the realism of your layout!

Project inspired by the work at

Just connect a wire from pin 9 to the resistor, from the resistor to the long leg (+) of your LED, and the short leg to Ground.



  1. This is neat, you know were going to need one with a smoke unit right.... right? (Go on)

  2. arduino does not like the statement
    Too easy to make a code mistake.

  3. thanks Steve this is amazing and works well


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