Archive for date: May 11, 2011

Inductive Spikes: Simulation and Reality

May 11, 2011 | Amateur Radio, electronics | By: Mark VandeWettering

Kindred spirits Atdiy and whisk0r over at the tymkrs blog were playing around with inductors: They demonstrated that inductors can generative large inductive spikes: in spite of the fact that there coil is charged by a relatively low voltage, when you sharply disconnect a coil from a charging voltage, it generates a large voltage spike […]

Flashback: the DEC 1091 at the University of Oregon

May 11, 2011 | Amateur Radio | By: Mark VandeWettering

In my previous post, I mentioned that I had programmed a machine that used core memory. It was the DEC 1091 we had at the University of Oregon back in the mid 1980s. I was overcome with a feeling of nostalgia, and decided to try to look up how to install TOPS-10 onto the simh […]

Magnetic core memory reborn… on an Arduino????

May 11, 2011 | Computer Science, electronics, Hacking, Hardware | By: Mark VandeWettering

I may have mentioned before, I’m kind of old. One measure of how old I am is the fact that I’ve actually programmed machines that used core memory. Real core memory. Little ferrite donuts on arrays of wires. Some time ago, I remember running across this awesome blog post from “Wayne’s Tinkering Page” which showed […]