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Lumenlab > LLAVS: Lumenlab AVS > Advanced Projector Builder > DIY Electronics Projects
Kriddels
I decided to use the LMH1251 for this project. Gets rid of some of
the nasty setup and adds an RGB pass-through buffer which I was going to
add anyway! So now I've got the parts and have my sample from
maxim. I am going to use that buffer to hook the 1251 RGB OUT to the D-SUB.
I am using low profile resistors in this project but you could use regular metal film or carbon if you like. This will be a really clean build with a PCB and top soildered resistors and ICs. The power will be 5 volts dc. Adapter should support 1 amp of current. The LMH1251 has alot of features here is the data sheet
I will have a page on my website shortly with details of more and I will also post here. Stay tuned this week. I will be finishing it up in the next few days.
Kriddels
Ok, so this is kind of a practice schematic. I am going to be changing the I/O jacks to headers as the actual jacks will be on a new piece of PCB connected with ribbon. I am going to be adding video switches and slide switches to control that and the other switches for auto/manual, HD/SD, Input, and Power. Now there aren’t two Component inputs on this since this does not reflect the I/O board. And this shows it being grounded and such. It will be grounded on the I/O board. Every thing will be placed in the back for I/O and The user interface most likely on top of the enclosure. These are just general design ideas and I'm not concerned with the I/O board or User board right now. I am going to be building the main SMT board with leads to connect the jacks for testing. From there I will work out and problems with this design. If anyone sees anything I have missed or have any suggestions between now and when the board is designed let me know. I am going off of this for all my headers including the switches, so here it is cool.gif
Paul3ct04
Kriddels,

Is pin 17 of U1 supposed to connect to 5V, which is connected to c9 and c10?
Kriddels
QUOTE (Paul3ct04 @ Jan 22 2008, 04:44 AM) *
Kriddels,

Is pin 17 of U1 supposed to connect to 5V, which is connected to c9 and c10?

Yes, it is 5v/2 power pin that is understood to be connected to a supply pin of the same name. Thanks for asking.
Kriddels
Ok so here's the down low on what's been going on lately. I am doing some revisions to the schematic and will be working on the main board and an I/O board to be jumped with ribbon headers. I will be adding A DC Jack, Switches LEDS and such to the design as well and I will be ordering some more parts so it will be a couple of weeks before I etch anything. I will post a new schematic later next week.
Kriddels
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.
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