Author Archives: M. Eric Carr

Serial LED Matrix

Daisy-chained SPI interfaces and fast microcontrollers make driving large, bright LED displays easy. Continue reading →

Posted in C, Components, Electronics, Toys, User Interface Design | Tagged Arduino, C | Leave a comment

A Bus Prognosticator, to show estimated time until the next inbound SEPTA bus. Continue reading →

Posted in 3D Printing, Arduino, C, Networking, Projects, Tools | Leave a comment

Flip Flash technology was innovative — but like everything about vintage photography, it was expensive. Continue reading →

Posted in Nostalgia, Tools | Leave a comment

In which I self-nerd-snipe and find an empirical answer to the original xkcd Nerd Sniping problem Continue reading →