Category Archives: Drexel

Topics related to my work and study at Drexel University

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 →

Posted in Digital, Mini Museum, Nostalgia | Tagged , , , , | Leave a comment

Non-Volatile SRAM

Posted on 2022-04-28 by M. Eric Carr

“Non-Volatile SRAM?” This, I gotta see. Continue reading →

Posted in Digital, DrACo/Z80, Drexel, EET325, Toys | Leave a comment

PCBWay

Posted on 2021-05-18 by M. Eric Carr

The Hex Decoder project finally gets a modern PCB, thanks to PCBWay. Continue reading →

Posted in Design, Digital, DrACo/Z80, EET325, Electronics, PIC Microcontrollers, Reviews | Leave a comment

Indistinguishable From Off

Posted on 2020-05-26 by M. Eric Carr

A Z80 computer stops working in the middle of programming — or does it? Continue reading →

Posted in Digital, DrACo/Z80, Drexel, Electronics, Fundamentals, Power, Troubleshooting | Leave a comment