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Longtime MAKE pal Raphaël Assénat wanted to recycle his stash of anti-static bags for component shipping, and built an improvised heat-sealer to do it. It’s just a step-down transformer, some current-limiting resistors, a momentary switch, and a resistance wire made by uncoiling a compression spring. [Thanks, Raphaël!]

Sean Michael Ragan

Sean Michael Ragan

I am descended from 5,000 generations of tool-using primates. Also, I went to college and stuff. I am a long-time contributor to MAKE magazine and My work has also appeared in ReadyMade, c’t – Magazin für Computertechnik, and The Wall Street Journal.

  • James B

    Nice project.  For anyone interested in store bought heating elements, I like:

    They supplied the heating elements I wired to an Arduino to make an annealing oven for glass and tool steel.  Good support, prices, selection and all that. 

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    For more information about tool steel, visit We present tons of information regarding tool steels and their uses.

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