Category Archives: HOW-TO

A Confusion of COM Ports

Posted on 2012-11-20 by M. Eric Carr

COM29? OK, time to clean house. Here’s how to delete unused COM port assignments in Windows. Continue reading →

Posted in Arduino, HOW-TO, System Administration | Leave a comment

LEDs as input devices

Posted on 2012-08-21 by M. Eric Carr

LEDs can be used as input devices, providing a digital output in response to light… Continue reading →

Posted in Components, Digital, Electronics, Hacks, HOW-TO, PIC Microcontrollers | Leave a comment

TTL debugging techniques

Posted on 2012-08-02 by M. Eric Carr

Here are some of the most common reasons why a digital circuit might not work, along with tips on how to diagnose the problem. Continue reading →

Posted in Design, Digital, EET205, EET325, Electronics, HOW-TO | Leave a comment

Rediscovering Vacuum Tubes, Part 1

Posted on 2012-07-30 by M. Eric Carr

A 6J6 vacuum tube is run through some DC tests… Continue reading →

Posted in Analog, Digital, Electronics, HOW-TO, Nostalgia, Power, Science | 4 Comments