I I have purchased a LMH1251 from digikey.com. It was about 6 dollars for one. I have been working on my design using that. I am using the MAX4383 instead of the LMH6739. So we’ll see how well they work together. I'm going to be using toner transfer method to make my PCB. I’m using all SMT resistors and components except my connectors (D-subs and Component) I'm making mine a Dual Component and using the RGB pass-through. I'm going to be a adding a Digital Tuner for OTA HDTV and will be adding digital outputs and such with a daughter board design. These will all be an ongoing effort. I have a plog Here, this for the transcoder using the LMH1251. If you would like to stick with using the components you are using right now I would be glad to help you in anyway I can. I will post a schematic of mine over this week. I may have the board design as well by then (See what time allowed).



Kriddels~

Hi Kriddels,

Any new schematic of your new design?

Sorry, I did not read the whole thread.
I was wondering is there a way to go the other direction?
My brother-in-law wants to use his LCD TV as a monitor, but doesn't have any outputs on his video card that is compatible with the TV. His computer is a little older, and only has a PCI slot for the video card.

I believe he has s-video,rca,component, coaxial inputs.
can anyone help him get this hooked up?

Thanks

Ok,

Now I've got samples of the LMH1251, LMH6796 LMH1981 chips FINALLY! Having taken courses on microwave applications (including pcb design) (I know we're not in that frequency range for this project) I'm not even going to consider "mocking" this up on a breadboard. My next issue is finding a pcb etching kit like Radio Shack used to sell... or a reasonable alternative. Does someone have any input?

Try this..

http://www.analog.com/UploadedFiles/Data_S...1345AD724_b.pdf

You can order blank copper boards and use toner transfer or peel-n-stick blue transfer methods. You can make your own etchant using Hydrochloric acid (Pool cleaner) with like 30% acid and hydrogen peroxide. Two Hydro: one HC, can dilute with water if needed. Design the board, print with laser printer on photo paper semi-gloss or peel-n-stick, transfer it with an iron like a decal, and etch. Then clean. There are full tutorials on line. I can post a burl later of a good one. I will be posting a schematic soon of my design. I am doing some revisions to mine at the moment. Adding some switches and going to be putting headers on the board. Everything is SMT on the main board and using headers for I/O and user interface. I will be adding a PIC to do switching via IR remote and am going to strip/mod a tuner and DVD player to work on my wonder box but more on that later. I have hopes on adding a BD drive in the next year or two. This is going to mainly be a wonder box for my projector. I have many plans and hope to get as many people interested in DIY "solid state" design. MCPCs are great. But you can't mess with a "solid state" unit.

This is about one of the only ways to take RGBHV and display it through any of the buses mentioned. I would suggest buying a new video card. You’re probably going to spend more money making an encoder box than buying a 50 dollar video card. Now if you really want to do DIY this would be a cool design. I guess your asking the right dudes because that’s of course what we are all here for. Now you’re going to have to add clock to this encoder or any other encoder for that matter. You’re going to need a microcontroller of some type too. I am seeking to work with HD decoders and encoders so this would be a great chance for me as well. I will sure look into this as I have time. At the moment I am working on my "transcoder". I am also going to be on working with serial LVDS controllers as well as PICs here in the month. I going to be building my own programmer for my PIC if anyone is interested I will post a PLOG on that soon and give them the link. I'll try and post my schematic over the weekend here for the "Transcoder".

Hi!

I decided to make this converter too.

What's the best way to do this now? Since i see here few different kind with diferent components, what's best with price/quality?




And i made a board for this circuit, if someone is going to do it too, It SHOULD now be working. All ICs are on copper side. Tried to make it as small as possible See attached. And say if u see something wrong in it.


EDIT: Stop asking in PM about this, i have'nt ever etched this PCB, just made with proto-board. And you dont actually need the zeners and amplifier in it if u have only few meters to projector. Minimum is LMH1251, caps, and few wires

Hi Zophar,

That triangle with the ball is the inverter symbol. You can use IC 74HC04 for that.

Now i thought that, does these transcoders also deinterlace?
or better to ask, are all PS2 games playable with this?
There's 2 posts in first page that it does, what i understand, but dunno....

do most cables that convert component to d-sub include the transcoder? for example: https://www.cablesforless.com/index.asp?Pag...mp;ProdID=14173 what type of device would this work with? would it hook up an xbox 360 to my projector(standard lcd monitor)?

These do not "Deinterlace" there is no line doubling going on here. I'm sorry for my delay of the forums(WORK). I will elaborate later on this subject. Was my schematic helpful. I have some revisions to show you all here in a few days. I have to bill out what parts so it will be few days.

No they do not. There is a cable made by Vdigi that is a Wii component to RGBHV D-sub transcoder cable in one! It’s not very versatile, but good for the Wii. Check it out here at Vidigi's website.

hi guys,

i'm new at your site and this is the first time i post, and i'm wondering if i can use 5% tolerance resistors instead of 1%? because her in the philippines it's hard to find those kinds of resistors with 1% tolerance. this is regarding with the transcoder with MAX4383 and LM1881 component to VGA.

thanks alot in advance.

I am trying to figure out what transcoder to make or buy to work with my hd tivo and I did some searching around the internet and found this.



Any idea if this is still an issue or how I can get around that? I found a converter that they say will not have this issue and it is much more expensive. Any advice?

Most transcoders only work on sync on green monitors. Look for the spec on whatever monitor you wish to you use and you should be fine. Most lcd monitors support this by the way.

My transcoder is changing to a upconverter now...lol I just bought a Westinghouse L2410NM it has component in so I couldn't pass it up for the price it was going for 329 best buy. Anyway so, I'm still using the design to get my RGB data and Im going to add a chip I got from analog devices for scaling source to 1920 x 1200. My main concern is dvd player and Wii. It should be a fun project. Im going to post some pics of my setup this week on my plog thanks.

Maybe its a tad bit late, but no. You cannot use 5% tolerance resistors because the values need to be as precise as possible, which is why Ken Gasper used 1% tolerance resistors.

Hello to Everyone, im looking for the MAX4383 amplifier on my city [Gdl, Mexico] But i cant find it in on my electronics stores, do u know some place to order online or something? Much apreciate.