Category Archives: Coding

The Old XOR Switcheroo

Posted on 2023-04-24 by M. Eric Carr

Swap two binary integers, without using a temporary variable. Not magic — XOR. Continue reading →

Posted in Algorithms, Assembly, Coding, Digital, Math | Tagged , , , | Leave a comment

Mini Museum: TRS-80 Model 200

Posted on 2023-02-06 by M. Eric Carr

The Tandy 200 — the Model 100’s larger brother. Continue reading →

Posted in BASIC, Drexel, Mini Museum, Nostalgia, Tools | Leave a comment

Mini Museum: TRS-80 Model 100

Posted on 2023-02-05 by M. Eric Carr

The TRS-80 was one of the first “laptop” computers, and an amazing device for its time. Continue reading →

Posted in BASIC, Drexel, Mini Museum, Nostalgia, Tools, Toys | Leave a comment

TTGO T-Display Deep Sleep

Posted on 2022-12-26 by M. Eric Carr

10mA isn’t an acceptable sleep current. Here’s how to put the TTGO to sleep. Continue reading →

Posted in Arduino, C, Coding, Digital, HOW-TO, Power | Leave a comment