techtravels.org

2-wire digital voltage display accuracy

I had a few needs to for a simple voltage display that can handle the range of +5v to +12v. There’s a few different applications like displaying the state of a battery, a state of a power supply and so...

Refilling Star Micronics NX-1020 black ribbon ink cartridges

I have an old Star Micronics NX-1020 Rainbow printer from circa 1993. I bought this printer using my paper route Christmas money that I saved up for months. The printer served me valiantly throughout the early...

HP Agilent 5382A tear down with photos

I recently tore down an Agilent E5382A Flying Lead Set. I used a Torx T-4 bit to remove the (4) tiny tiny screws. This adapter has a 90-pin connector that comes from HP logic analyzer cards, and then goes out...

Setting up a SCSI2SD on HP 167xxA for CDROM and HDD targets

This quick guide contains instructions on how to setup, configure, burn, and launch an install from a SCSI2SD when inserted into an HP/Agilent Logic Analyzer on the 16700 series. A fresh install is always...

Evaluating Battery Backup Solutions for CPAP machines

I recently had a need to provide a battery backup solution for a CPAP machine. A CPAP machine helps people, who suffer from sleep apnea, get a good night’s rest. About 20 million Americans suffer from...

On building an A500++

Commodore Amiga 500 Plus In the 1980s, Commodore made a newer version of their very popular Amiga 500, called the Amiga 500 Plus. It added a few things, namely newer versions of Kickstart and Workbench — both 2...