lvds

ChalkElec

... solution to connect to cheap notebook LCD. And we have walk down this path to fulfill the requirements. Our solution comes with a plug-n-play 10" LVDS LCD with capacitive touch built-in. Our board also acts as a power supply to power up RPi from the USB port on our board. This smart feature will ...

ChalkElec

Hi everyone, after long development and mistakes that we encounter during the LVDS interface development, we finally got it done! Our LCD/LVDS interface for Raspberry Pi is finally launched! Check out our video on our HDMI-LVDS in action http://www.youtube.com/watch?v=llC-gVw1wBs ...

ghans

I'm interested how the touch part works on that one.

EDIT : Hmm. It looks like the CPU is maxed out the whole time.
ghans

Bayees

Hey Guys I have been looking for a compatible 10" touch screen for the RPi and finally found my solution at Chalkboard Electronics. They are currently taking in pre-orders at a discount price. Just pre-ordered one even though I haven't recieved my RPi yet. Hopefully they will arrive around the same ...

godFather89

... more time for it): https://www.dropbox.com/s/9o8192ad5vdma7q/HdmiToLvds.zip Schematics and PCB are made in DipTrace (it's free). It uses an 18 bit LVDS interface. You can switch to a 24 bit lvds by changing the LVDS transmitter. Some caps need to be added on the supply rails (they are not in the ...

recantha

Sounds like a fantastic idea - I'd be very interested in a converter like this. I have so many displays sitting around at home... Even if just one of them works I'd be happy!

ceteras

The LVDS interface of this board is 6bit, single channel. That translates to four lvds pairs, max resolution is at 1440x900, I think, for this kind of setup. So yes, you can connect the board to any kind of panel sporting a ...

centizen

Very interested. Will this be able to use the common slimline 40 pin LVDS interface? Or will it be a different one?

pksato

... or HDMI for this type of screen? Thank you. Is possible, need a controller kit (+ inverter, cables and psu), like this http://www.ebay.com/itm/LVDS-VGA-DVI-AV-HDMI-LCD-controller-board-DIY-2662-/271019078299 Or, not existing, DSI to LVDS bridge. Both approaches need a specific firmware to panel ...

ghans

If you are really desperate to use this screen look into the "Design for a HDMI to LVDS apdaptor" thread.
That should give you a overview.

ghans

techpaul

... vias on the board name them GND and this gives good ground plane connectivity between layers and planes stops radiation points. For HDMI and LVDS connectors I would draw a ground plane polygon on both sides of the board You are welcome to email me if you get stuck

ceteras

Regarding the crystal, that's exactly what was on my mind two minutes ago :). I was looking at those two traces going underneath it, and it really doesn't look good. I have another Eagle question: I'm trying to redo the hdmi connector, I need the 4 pads to be GND, that is, when I draw a GND polygon ...

techpaul

Having saved the image locally and viewed in a graphics programme. Can I suggest you move the crystl and caps left (towards HDMI connector side of board), it is not good practise to run signals under a crystal or oscillator, they tend to interfere. Move caps closer to crystal, keep those track runs ...

techpaul

Thank you, I hope I'll make a better pcb, next iteration! We all start somewhere I have been using Eagle for over 12 years, some part libraries on my website. Indeed, Eagle made the via diameter at 0.9mm. But for a 0,5mm drill, the diameter was unchanged whatever I typed in the properties window. (...

ceteras

Thank you, I hope I'll make a better pcb, next iteration!
Indeed, Eagle made the via diameter at 0.9mm. But for a 0,5mm drill, the diameter was unchanged whatever I typed in the properties window. (Eagle 6.1.0)
With 0.4 / 0.8, I can have 0.25mm space between tracks and vias, and it looks a lot better!

techpaul

... I think I'm close to perfect, I like how things are positioned: on the left of ADV7611 I have the HDMI inputs and on the right side of SN75LVDS83 lvds transmitter I have the LVDS pairs, and I can very easily assure equal length for all the i/o differential pairs. I've once considered rotating ...

ceteras

... I think I'm close to perfect, I like how things are positioned: on the left of ADV7611 I have the HDMI inputs and on the right side of SN75LVDS83 lvds transmitter I have the LVDS pairs, and I can very easily assure equal length for all the i/o differential pairs. I've once considered rotating ...

techpaul

On closer inspection I would seriously consider dropping signal via sizes as there are several places where your layout would fail DRC checks for 0.2mm clearance between via and anything else.

Consider rotating the ADV chip by 45 degrees may give easier layout.

techpaul

What size vias are you using on signal tracks? Most places can drill vias down to 0.3mm with NO price premium. I would suggest you use 0.4mm or .5mm drill for vias on SIGNALS with tracks up to 0.5mm width. On power tracks use 0.6mm or 0.8mm drill Reducing via size can free up a lot of track space. A...

techpaul

Maybe many ways of moving tracks about, not looked at it closeley just the small images on this page.
There seems to be plenty of room there. I cannot quite see how many layers you have

ceteras

@techpaul: thank you, it looks like the right company for the job. Unfortunately I've had quite a setback with the PCB, seems to be a bug. Pins 51 and 52 from IC3 are connected in the schematic to pins 41 and 39 from ADV7611, however they do not show up as airwires in the pcb editor. This means I ha...

techpaul

If you want PCBs made a good place to start is pooling PCB for small runs. A company I have used for years is Beta Layout with places through Europe, online order and take Eagle files DIRERCTLY, no producing Gerbers. Boards 2-8 layers, also production batches as well. Even had them produce specialis...

ceteras

New image export from Eagle, I've managed to improve the pixel parallel bus and other small improvements. I'm looking for manufacturers, I don't know yet if the board can be produced and how much it would cost. I still have to work a little on the microcontroller side, I didn't check if I use the op...

jbeale

... designs right now; within the next year, it looks like probably just a few small bug-fixes to the existing R-Pi (plus the camera board, a LCD DSI-LVDS bridge board, and the cheaper 1-USB port R-Pi Model A). There are quite a few other embedded-Linux boards available, although I don't know of any ...

ceteras

So far, my pcb looks like this, but still there's a lot of work to be done.

I think I will update the image as work is progressing.

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