State quarters are fun to collect because of their variation, but some minting errors can bring another level of challenge ...

Before you head to the laundromat, you should look through the quarters you plan to spend. You may have a rare coin better suited to be auctioned off or artfully displayed than used to wash your ...

His build log covers both the carpentry and electronic aspects of the build, from cutting the panels to his own code for running the coin acceptor that takes your quarter (or, as he is in Italy ...