How to make a VGA splitter.

In this instructable i will show you how to make a VGA splitter that can switch between two inputs or two outputs. this instructable is a modification of a printer(parallel) splitter.

Step 1 What you need.

Here's what you need to make this:

-parallel splitter
-parallel cables
-3 radio shack 15-position female VGA plug
(276-1502)
-headphone style jack (female)
-multi. voltage DC power suply (3v)
-soldering pen
-solder
-flux

Comments

[11flint]

What exactly do you mean by the "positive and negative" of the splitter? Are there pins on the DB-25 which will give you the voltage rating of the power supply (in the event you are using a powered splitter)? And an ammeter is to measure current. Could you please specify what you mean by the "positive and negative of the splitter"?

[DonQuijote]

i don't get it. call me stupid, but i don't....

[bijikenyot]

....same mind..i still confuse, ..... about this title? is this some questions or some ideas?

[burzvingion]

Thats because his phraseology is just slightly inaccurate. A splitter technically takes one input and propagates it to two outputs simultaneously. These devices are usually passive (not powered), so the output signal is weaker than the input signal (sometimes this kind of splitter is known as an attenuator). Most often you see this kind of device in co-axial cable or satellite TV setups. On the other hand, a switch takes a source and connects it with either the A or the B destination, or vice versa, as thatonekid says in the instructable. It's accomplished inside with a chip called a CMOS bilateral switch. There are all sorts of varieties of these, with various properties. The most important one here being bandwidth. A parallel data switch only needs to switch a low-bandwidth digital signal. VGA is much higher bandwidth and uses analog signals, so you run the risk of having problems if the data switch in question didn't use high quality parts. In addition there's the problem off crosstalk, where one signal affects another one nearby it. This can cause ghosting or artifacts. This is why KVM (keyboard-video-mouse) switches are usually quite expensive compared to parallel, serial, and USB switches.

[GorillazMiko]

Very nice. Nice soldering job(s) too. What kind of soldering iron/ gun do you use?

[thatonekid]

the soldering pen that used is made by Ungar, they make some realy nice soldering equiptment but they're expensive.

[camintmier]

I like the idea, but I really would have liked to have seen pin assignments (aka: pin 1 VGA = pin x Parallel). Also, it might help to put hot glue over the soldered pins, essentially making a boot for it. Other than that, it's a pretty ingenious idea. <br/>