RSS
A great how-to on converting a VGA to RJ45. From the site, "I was just about to finish my projector project when I hit a snag. I needed a super long VGA cable to reach from the LCD my computer, which were on opposite sides of the room. Initially I was going to move my computer to the projector but decided against it. I read a few articles involved with VGA conversion and decided to give it a shot. Of course it might have been more practical to buy an extra long VGA cord for around $25 plus shipping, albeit more expensive." Thanks jher! Link.
HOW TO - VGA to RJ45 Conversion
A great how-to on converting a VGA to RJ45. From the site, "I was just about to finish my projector project when I hit a snag. I needed a super long VGA cable to reach from the LCD my computer, which were on opposite sides of the room. Initially I was going to move my computer to the projector but decided against it. I read a few articles involved with VGA conversion and decided to give it a shot. Of course it might have been more practical to buy an extra long VGA cord for around $25 plus shipping, albeit more expensive." Thanks jher! Link.
Posted by Natalie Zee Drieu |
Feb 3, 2006 03:42 PM
Electronics |
Permalink
| Comments (3)
| Email This |
| Digg this!
Recent Entries
- Make: Holiday Gift Guide 2009: Mischief Maker's Gift Guide
- Grounding tips for mixed signal PCBs
- Virgil England's fantasy-land
- Novation Launchpad teardown
- Laptop Etch-a-Sketch via Arduino & Processing
- iPhone macro lens carousel
- New in the Maker Shed: OLLO kits
- BlueSMiRF found in credit card sniffer
- Mystery iPhone musical instrument - World's most expensive ocarina
- Stained glass d20s
Comments
Oldest comments listed first.
Leave a comment
Subscribe to MAKE Magazine!
Subscribe today, save 42% and get web access to MAKE free. MAKE Digital Edition is available only to subscribers.
$34.95 / 1 year
(4 Quarterly Issues)
I've made a setup like this a while back, and noticed
the screen (TFT) went black for a second when lights
were activated elsewhere in te house.
A solution for this problem...
Still need to dig deeper.
Reply to this comment
I suppose you could, but why?
The characterisitic impedance of RJ45 is 100 Ohms.
So the single-end impedance to the wire you are using as the return wire is about 50 Ohms (give or take.)
VGA uses coax which has 75 Ohms single-end impedance to the return wire. So using this as a cheap cable extension is not really what you want to do since the circuitry driving VGA ia expecting a 75 Ohm transmission line terminated to 75 Ohms at the receiver end. Also Coax is sheilded much better than the twisted pair covered by foil in RJ45. The VGA cable is not so much more expensive enough to make this worth it.
Reply to this comment
I suppose you could, but why?
The characterisitic impedance of RJ45 is 100 Ohms.
So the single-end impedance to the wire you are using as the return wire is about 50 Ohms (give or take.)
VGA uses coax which has 75 Ohms single-end impedance to the return wire. So using this as a cheap cable extension is not really what you want to do since the circuitry driving VGA ia expecting a 75 Ohm transmission line terminated to 75 Ohms at the receiver end. Also Coax is sheilded much better than the twisted pair covered by foil in RJ45. The VGA cable is not so much more expensive enough to make this worth it.
Reply to this comment