how can I hack a cga computer monitor to work for rca?

Hello, I was wondering if anyone can make a instuctable for me so I can wire some rca plugs
for my science project i'm working on.

I assume that you want to view composite video (RCA type jacks on the back of a VCR or DVD player) on a monitor.

Do you actually mean a CGA or a VGA? If VGA, then there are off the shelf converters to do it, but they may cost somewhere in the $30 to $50 range. I have a device that converts composite audio and video so that it can be viewed on a VGA monitor. It also includes an analog TV tuner, and it cost about $40 a few years ago. I bought it because I had a relatively large unused monitor and it was cheaper to buy the adapter than a comparable size TV.

It wouldn't be effective use of money or time to build such a converter from scratch. I assume that your sciece project itself is something different, and you just wan't it to display something related to the project?
cburgess7x (author)  LargeMouthBass6 years ago
well the thing is, is that it is cga, i can tell this by the fact that it has eight pins on the plug that you put on to a pc, or mac. I took it apart and fount the central video plugin but i dont know what pin combination to use.
orksecurity6 years ago
If you really mean CGA -- a CGA monitor was designed to show only sixteen colors (one bit each of red, green, and blue, plus one overall high/low intensity control). Theoretically you could replace the input circuitry... but I think doing so would cost you more than finding a new monitor.

Decent used CRT monitors are available for a song, these days -- often just for the effort of hauling away -- as people replace them with LCDs, since most towns charge a fee to dispose of them. Sign up for Freecycle, post a "wanted" note, and you'll probably be offered more than you can use.

(Since working inside any CRT monitor involves working close to several kilovolts, which -- especially in older monitors -- may be present even when the box is unplugged, I'm not really comfortable with the idea of anyone who has to ask trying to modify that circuitry.)