Good day, all - I am currently working on a new train layout at Pittsburgh's Children's Hospital. The layout is a professionally produced Harry Potter layout that is really spectacular.
There is a large castle at one end and I thought it would be appropriate for the children to press a button to active a few flashes of lightning and claps of thunder.
I used a small MP3 player and an Arduino to operate the animation and I am very pleased with the effect - I hope to install the unit next week. Even though the layout is in a fairly brightly lighted area I am using three VERY bright LED spotlights to create the flashing lights so I hope the effect will be satisfying.
If you would like to try to roll your own details are on my web page at: http://www.trainelectronics.com/Anim...der-lightning/
...and there is a video on YouTube