[digitaltrails] wanted the data on a few old IBM 80-column punch cards he had lying around ... [digitatrails] used the Python Imaging Library to scan one row of pixels where each column is ...

This adorable DIY punch card activity ... pads with watercolor paper that's as thick as card stock. I used my library card as a stencil to help me cut the sketch paper to the 3.5"x2" size I ...

[Tymkrs] had a robot paper cutter, so naturally they made punch cards. But then, of course, they needed a punch card reader, so they made one of those too. All with stuff lying around the shop.