CurtPalme.com Home Theater Forum

[CasetheCorvetteman]

[mookee]

so my guess is that what i wrote on the picture is all i need to do with the chip..?? please just tell me which numbers of the chip are also in use if there is more to do

and 3 times a 220resistor for rgb
such as a 0,1uf resistor for the comp input.. ? right

[gjaky]

You probably meant:

[mookee]

yeah, +
what about number 7 and 1, which isthe hs?

[AnalogRocks]

[AnalogRocks]

[mookee]

haha

[CasetheCorvetteman]

1: goes to H on projector
2: is composite video from SCART connector
3: goes to V on projector
4: is ground
5: is nothing important
6: make that simple circuit and connect to ground ( its a 680k ohm resistor and a 0.1uF ceramic cap in parallel, so connect both to pin 6 and ground the other end, which you can use pin 4 )
7: nothing
8: 5v DC supply, which you will get from the SCART cable.

The R G and B lines from the SCART cable wont need the 220uF electrolytic caps if you use a pre-made SCART cable, they are less than $10 usually, i paid $6 delivered to Australia from China. Bargain.

[mookee]

cool , am right on to it wright now, thanks to all!,

but as i am using a female vga connector where my vga to rgb cable goes in (i forgot to buy bnc jacks;) , do i have to bridge the rgbs to the rgb returns, or are they obsolete?

ohh, and what about vga pin 10 or 5 ( http://en.wikipedia.org/wiki/VGA_connector ) ?

ohoh, my chip has now direction mark on it, there is only the name imprinted..?


lg c

[CasetheCorvetteman]

There will be a dot on it, that is the top as you see it in the drawing.

You need to go into the 5 BNC connectors, those other connectors are not video inputs.

[CasetheCorvetteman]

Have a look here:

http://electronicsclub.info/ics.htm

[CasetheCorvetteman]

I wasnt sure about your question on RGB return, ignore those, the only pins you need are 1,2,3,5,13,14, the rest are of no use.

[mookee]

can i switch between 5 and 10..both are ground.!

and no, my little assole chip has no marks at all..))

[CasetheCorvetteman]

Show a pic of the chip.

5 is ground, if you use 10 then connect both.

[mookee]

thanks

[mookee]

hey

i got a premade multiav cable now wich has a rgb, video and audio l r output, all composite . now i connected the rgb plus to rgb plus, the composite video plus to pin 2 and the ground from the composite video to ground. nothing realy happened...

where do i get the power from this kind of cable, as nothing realy happend so far without power,.. and if i use an alternative power what happens with the minus of that power source?!!

canit be that nothing happens without the power


please help

lg christoph

[AnalogRocks]

[AnalogRocks]

[mookee]

not helpfull but interesting;)
any additional thoughts?

[CasetheCorvetteman]

Let me have a look later when i am awake.

I need pictures of what you have, im good, but im not that good, and i prefer not to guess.

[mookee]

something like this with additional video composite http://i01.i.aliimg.com/wsphoto/v1/503906087/free-shipping-font-b-Component-b-font-font-b-AV-b-font-Audio-Video-HDTV-Cable.jpg
(got to mention that instead of the original playstation cable ALL pins are present on that multiav plug-instead of only four pins at the original ps cable)

all that (rgb + video +plus chip vs hs)
goes to the right pins (1,2,3,5,10,13,14) of my vga to dvi thing that i deconstructed to have a female vga out http://upload.wikimedia.org/wikipedia/commons/thumb/4/4f/DVI-VGA-Adapter.jpg/220px-DVI-VGA-Adapter.jpg

so that i can plug in my vga to rgbhv cable..

and just to make shure that i made myself clear, i didnt power up the chip yet! (dont know how to, but without powering allmost nothing happens at all)

sorry for the messi description. i have no cam at all..)


ps: what the time @ your place i got 11pm

[mookee]

oh, and if this is my chip http://www.ti.com/graphics/folders/partimages/xLM1881.jpg.pagespeed.ic.7XK4LM7Dew.jpg
i assumed that respectively to the lettering pin 1 is up left .. hopefully a good guess