Author Archives: M. Eric Carr

Quadrature Encoders

Posted on 2022-06-30 by M. Eric Carr

Quadrature rotary encoders are inexpensive and very easy to wire up. Here’s how to use them with interrupts in Arduino C for ESP32. Continue reading →

Posted in Arduino, Building blocks, Digital, Electronics, HOW-TO, User Interface Design | Tagged , , , , , , , , , , , , | Leave a comment

New Toy: Round LCD Displays

Posted on 2022-05-29 by M. Eric Carr

Round, Arduino-friendly color LCD displays. These should be fun… Continue reading →

Posted in Arduino, Components, Digital, Toys, User Interface Design | 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

Meta-tool

Posted on 2022-03-27 by M. Eric Carr

A print-in-place bike suspension adjustment wrench demonstrates 3D printers’ ability to make working tools. Continue reading →

Posted in 3D Printing, Tools | Leave a comment