Buying A CCTV System, Camera or DVR ?This guide has been written to help buyers make an informed decision when purchasing CCTV equipment. The purchase of CCTV equipment, be it on Ebay, an Internet Site or from...
Glossary of Terms for CCTV Equipment AC Adapter Alternating Current Adapter; when plugged to 240 volts/ 50Hz AC Power (usually 117V AC/60Hz in the United States) it produces 12V DC, 24V AC or others. "UL...
With so many cameras on the market, it is important to compare features when deciding which unit to buy. Purely photographic variable like zoom length and maximum aperture are probably more familiar to you,...
I am a "newbie" in the HP collectors' arena. This is a small guide to the calculators I have taken to heart. Being a newbie doesn't mean that I don't know about HP - I had my first HP calculator, an HP-41CV,...