Category Archives: Drexel

Topics related to my work and study at Drexel University

Mini Museum: Punched Cards

Posted on 2022-09-26 by M. Eric Carr

Data was once stored on punched cards, which allowed for direct manual data entry. Continue reading →

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Mini Museum: Slide Rule

Posted on 2022-09-06 by M. Eric Carr

Slide rules — analog mechanical calculators — helped build the modern world, three sig figs or so at a time. Continue reading →

Posted in Lore, Math, Mechanical, Mini Museum, Nostalgia, Tools | Tagged , , , , , , | Leave a comment

Mini Museum: Player Piano Scroll

Posted on 2022-09-05 by M. Eric Carr

Player Piano scrolls — digital music is even older than digital computers! Continue reading →

Posted in Digital, Drexel, Mechanical, Mini Museum, Nostalgia | Leave a comment

Mini Museum: Morse Telegraph Relay

Posted on 2022-08-23 by M. Eric Carr

A Morse 4-C relay from circa 1900 is investigated and made to work again, driven by a modern microcontroller. Continue reading →

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