DIY Semaphore Lantern

I was watching Going Postal by Terry Pratchett and in the movie, there were these things called "Clacks Towers". Each tower consists of a massive light with a 4x4 shutter flap system (lots of ropes/pulleys/levers). Anytime someone wanted to send a message to another town, they'd do it through the c...

By: Tymkrs



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from Instructables: exploring - technology http://ift.tt/1t6Exkm