Gadget Builder’s Optical Punch's Optical Punch

A few days ago I posted a story about Harlan’s homemade optical punch.  I forgot that I also had a link to John Moran’s web site, where he describes with a little more detail how he made one.

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Nothing in the world can take the place of Persistence. Talent will not; nothing is more common than unsuccessful men with talent. Genius will not; unrewarded genius is almost a proverb. Education will not; the world is full of educated derelicts. Persistence and determination alone are omnipotent.