Wednesday, September 5, 2007

VGA over Cat-5 ethernet cable

It's possible to send a VGA "video" signal down an ordinary Cat-5 ethernet cable. This is possible for two reasons: firstly, although VGA connectors have 15 (or 13) pins, only about 8 wires are actually necessary to send the VGA signal; and secondly, ethernet cable is twisted pair, and we can use the magic of twisted pair to push the analog VGA signal further than spec. The diagram above shows conversion from HD15 (VGA) to RJ45 (an ethernet socket). A similar adapter is used to convert back again. Connectors are shown from the solder side. This diagram assumes your Cat-5 cable is crimped in the standard way (not as a cross-over cable). Detail...
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Tuesday, September 4, 2007

Baybus



The idea here is to produce a small box which should alter the voltage of the fans with some switches. The fans are those that cause most of the noise in a computer, so decreasing their voltage causes a decrease in revolutions per minute, and therefore a reduction of noise. The efficiency is also decreased, but this is taken in consideration by allowing the user to switch between levels of voltage Detail...

Monday, September 3, 2007

LogoMouse

From metku.net
You all have seen these optical mouses with leds and stuff but there is still room for some improvement. Why not mod a mouse and add your own logo/image to it. Let see how you can do that
A standard Microsoft ps2 rodent was more trickier to open than I first thought. Two plastic "hooks" that hold the case together are marked with number 1. This hidden screw you have to remove first is marked with number 2. I removed it but didn't notice those hooks in time so I broke them. Sad. Well, the case still holds together with that screw so no harm done. Detail...

Sunday, September 2, 2007

RS-232 Laser Transceiver


From: electronics-lab.com
Laser based projects used to be expensive, until the development of solid state lasers. This project is designed for the entry level laser experimenter. The circuit allows any two computers with serial (RS-232) communication capability to communicate over 200 meters using a laser beam. A low cost transmitter only circuit is also presented here for use in one way communication and other laser based projects. Link...

Saturday, September 1, 2007

HDRack


The designers of my computer case, the bright men of design had gathered their brainpower together and the result was a very poorly functioning HD/floppy drive stand, so I had to help myself with this one. Not that much of a mod, but a handy trick. So, this is the story of how I got a functioning, cheap and easy-to-make attachment for several HDs
I happened to have some of those AT-aged backpanels which had places of 9 and 25 pinned serial ports. I just clipped the connectors off the plates and, lookie lookie, the HD frame starts to be finished. Detail...

Friday, August 31, 2007

Old CRT Computer Moniter Into A Fish Tank


by mcanderson76on from instructables.com
introTurn Your Old CRT Computer Moniter Into A Fish Tank ! ! !
Talk about a great screen saver! I've been wanting to do this build for a while now. Just about every time I see and old CRT computer monitor by the side of the road on trash day I think to myself ...that would sure make a cool looking fish tank. So here is my first attempt at turning and old computer monitor into a fish tank. Detail...
Related:
  • How to Convert an Old TV Into a Fish Tank Link...

Thursday, August 30, 2007

MouseFan

From metku.net
So, your hand is getting a little warm while playing or surfing the net? This little mod could help you. The basic function is somewhat similar to the device in bowling alleys where you can dry you hands and the bowling ball. Lets try out if this idea works :) Detail...
Related:
  • MouseFan at Elephantstaircase.comLink...