Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

For a $34 engine, this little Stirling engine with generator and RGB lighting from Banggood seems to be a pretty good deal!  It runs great.

I had to go to youtube to get an explanation of how a two-lead LED could be an eight color RGB light.  I won't try to explain it, as I am not an electrical engineer, but if you are curious, look on youtube for "Update mystery Two Pin RGB LED."  It will be close to this title.  I found the explanation fascinating, if not a little over my head.