INFRAREDGUY

I meant online to read,, the forum is good for questions but i mean info i can read online on cctv , that way i dont have to pruchase some expensive book , thanks

Hello, I notice that there are alot of sites on the internet for cctv products and dvrs' where online can i find a site that gives free information on how cctc and dvrs work.. im ,looking to read about this stuff but cant seem to get any tutorials or info online,, does anyone have any websites that offer this free info for beginners