Category Archives: Drexel

Topics related to my work and study at Drexel University

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

Z80 delay loops

Posted on 2012-06-01 by M. Eric Carr

The “spinloop” is a useful, basic tool for creating simple delays in machine code. Continue reading →

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

Peripheral Interfacing on the 8-bit DrACo/Z80

Posted on 2012-05-30 by M. Eric Carr

Interfacing peripherals with the 8-bit version of the DrACo/Z80 is still possible. Here’s how. Continue reading →

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

Voltage dividers

Posted on 2012-05-09 by M. Eric Carr

Two or more resistors can be used to make a voltage divider, to reduce voltages by a given ratio. Continue reading →

Posted in EET201, Electronics, Fundamentals | Leave a comment