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Instructables user rog8811 set out to build a functional replica of an old-timey manual boating foghorn using hardware-store stuff. He shows you how to build the basic horn by cutting apart a PVC sink trap and hacking it onto an off-the-shelf air pump. Then he does something I’d like to see more of in my own and others’ project tutorials—he encourages you to make the project your own: “Go mad! Get as many plumbing parts as you can screw and glue together to make the sound path long and wider.” It sounds on both strokes of the pump handle cycle.

Sean Michael Ragan

I am descended from 5,000 generations of tool-using primates. Also, I went to college and stuff. I write for MAKE, serve as Technical Editor for MAKE magazine, and develop original DIY content for Make: Projects.


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