Archive for date: May 17, 2011

All LEDs are not created equal…

May 17, 2011 | electronics | By: Mark VandeWettering

Of course I knew that all LEDs aren’t the same: they differ in color, size and brightness. They also differ in the forward voltage, reverse voltage and capacitance. When I simulated the Joule Thief with LTSpice, I just picked a random LED out of LTSpice’s catalog. When I simulated it, I got a waveform like […]

Update re: the HamCan.

May 17, 2011 | Amateur Radio | By: Mark VandeWettering

Dave, NM0S and designer of the HamCan, a kit that I previously assembled, but had some difficulty with nicely contacted me via email today so ask if he could be of help. I’m pretty sure that whatever the issue is, it’s my own fault, but hopefully with some patient help from Dave I can figure […]

My trip down memory lane leads me back to TOPS-10 and the PDP-10

May 17, 2011 | Computer Science | By: Mark VandeWettering

I’m going to be nostalgic for a few moments. If you are too young to have any sense of nostalgia, skip ahead to the bold text below. You were warned! A few days ago, I mentioned that I was having a bit of flashback, thinking of my first experience with time sharing computers back in […]