New Project: Spy Tech: Polarized Hidden Messages
We all know sunglasses make any spy look cool, but these will let you see secret messages! This secret message project uses polarized film (technically a linear absorptive polarizer) to make our message hidden. To see the message you either have to look through a second piece of film, or […]
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MAKE Magazine and Instructables.com's Blog
MAKE Magazine and Instructables.com isn't a Goodreads Author
(yet),
but they
do have a blog,
so here are some recent posts imported from
their feed.
