Computer hardware

New HP 7585B pen plotter


I got a new pen plotter recently, an HP 7585B. New to me, of course-- this thing was built around 1987.

I have wanted a larger printer for a while, for printing sheet metal designs and similar miscellaneous uses. Of course I can print on regular 8x11-inch letter-size paper or 14-inch legal-size paper, cut the unprintable margins, and tape pages together, trying to get them straight. That, my friends, is annoying.

Serial port control of power switch

I have an old laser printer which does not have a decent standby power-saving mode.  I built a computer-controlled power switch for it, so the computer turns on the printer when there is a print job, then turns it off again later.

KVM Custom Power Supply

I acquired an older Connect-Tek KVM (PC keyboard/video/mouse) switch. I got it for free because it was missing the power supply. I decided to make one.

Linux Digital Picture Frame

Like many people, I have growing number of pictures from my digital camera. I decided that I wanted a digital picture frame to display them in the houseThe purchase price is just too expensive for me to afford (anywhere from US$100 to $900 or more) so instead I am building one.

I acquired an older HP Omnibook 2000 laptop. It has a 2GB hard drive, PCMCIA slots, and an 800x600 TFT LCD display. I am now working on the software setup. After that is working then I will do the hardware frame part.

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