Board Thread:Suggestions forum/@comment-79.69.29.107-20160718173841/@comment-26172435-20160725124601

No continuous power sources other than mechanical on-time action afaic. So, levers and tripwires may be okay, to simulate some manual / mechanical interaction with a pulley-cog-lever system, but that's it. No weird science in the 'early middle-ages' themed world of Tolkien.