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by ceteras
Wed Sep 19, 2012 8:18 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: STICKY: The I2S sound thread. [I2S works]
Replies: 1001
Views: 575951

Re: I2S: Anyone got it running?

@McDaisy : Yes, it's 100% correct, I've just double checked it.
by ceteras
Tue Sep 11, 2012 10:21 pm
Forum: Other projects
Topic: first design for an hdmi to lvds adapter
Replies: 78
Views: 83498

Re: first design for an hdmi to lvds adapter

I've already got the ADV7611 from Analog Devices. It's a pity they don't do one with lvds output instead of parallel pixel bus.

On the other hand, Realtek perhaps will not do business with small volume projects.
by ceteras
Tue Sep 11, 2012 9:50 pm
Forum: Other projects
Topic: first design for an hdmi to lvds adapter
Replies: 78
Views: 83498

Re: first design for an hdmi to lvds adapter

Well, this is how it looks so far (you can click the image for a larger view): http://cete.ro/images/adv7611_02.png I'm not 100% happy with it, specially the lvds connector, X2 at the right. I want to change it for a standard lvds connector. I either will use one of the ebay seller njytouch standard...
by ceteras
Sun Sep 09, 2012 3:03 pm
Forum: General discussion
Topic: Availability of Raspberry Pi V2.0
Replies: 37
Views: 14041

Re: Availability of Raspberry Pi V2.0

troombatzia wrote:Pleaee, could someone tell me if the reset circuit is only implemented in rev. 2 board?
Affirmative, only in v2.0 revision.
by ceteras
Sun Sep 09, 2012 1:47 pm
Forum: General discussion
Topic: Availability of Raspberry Pi V2.0
Replies: 37
Views: 14041

Re: Availability of Raspberry Pi V2.0

Hi, could you tell more about this new I2S interface option ? as I cant find info about it anywhere... Datasheet: http://www.raspberrypi.org/wp-content/uploads/2012/02/BCM2835-ARM-Peripherals.pdf Datasheet errata: http://elinux.org/BCM2835_datasheet_errata Unofficial pinout: http://elinux.org/RPi_B...
by ceteras
Fri Sep 07, 2012 3:49 pm
Forum: General discussion
Topic: Availability of Raspberry Pi V2.0
Replies: 37
Views: 14041

Re: Availability of Raspberry Pi V2.0

Thank you for the answer, and I apologize for the wrong wording. I meant rev2 PCB, the one with two mounting holes and all other small fixes and changes. I need the mounting holes for my applications, I find it very difficult to mount the pi on the bottom of a metal case and make sure it doesn't mov...
by ceteras
Fri Sep 07, 2012 3:18 pm
Forum: General discussion
Topic: Availability of Raspberry Pi V2.0
Replies: 37
Views: 14041

Availability of Raspberry Pi V2.0

I know for many (including the Foundation) it doesn't really matter, but I know I'm not the only one who would like to know what the odds are to get a version 2.0 PCB. One detail that I didn't get from the announcement is: are V1.0 pcb's still being manufactured? Can we be informed when all V1.0 are...
by ceteras
Wed Sep 05, 2012 11:01 am
Forum: Other projects
Topic: HDMI->LVDS converter
Replies: 35
Views: 59570

Re: HDMI->LVDS converter

I'm not sure the 800x480 resolution is supported by the hdmi port, look at dom's post here .
Only the standard modes are supported, shown here:
http://elinux.org/RPi_config.txt
by ceteras
Wed Sep 05, 2012 10:23 am
Forum: Other projects
Topic: first design for an hdmi to lvds adapter
Replies: 78
Views: 83498

Re: first design for an hdmi to lvds adapter

I've made a lot of changes to the board lately, the goals for it are: - lvds and I2S outputs - to be small and low power - (maybe) it should be possible to make at home I plan to make one more change, to remove the microcontroller from the board and provide a header for connecting another mcu board ...
by ceteras
Mon Sep 03, 2012 10:05 am
Forum: Other projects
Topic: 7" monitor cabling conundrum
Replies: 8
Views: 2687

Re: 7" monitor cabling conundrum

Why not cut the red and black wires here : http://t2.gstatic.com/images?q=tbn:ANd9GcRvuC6dRlTHizBtK4LjxMmxhsKGSqqVtsJMD_xWo5qgHToXGVY9&t=1 Right after the fuse? Then solder these to the red and black wires from the first display? Then you can use your second display's mains power supply. You won...
by ceteras
Sun Sep 02, 2012 11:17 pm
Forum: Other projects
Topic: HDMI->LVDS converter
Replies: 35
Views: 59570

Re: HDMI->LVDS converter

If you want to make the board, use "HDMI TO LVDS.dip" from the archive, it's the PCB. SN75LVDS83 is the 56pin variant, but SN75LVDS84 (48 pin) was used on the board (and in the schematics). The TFP403 reference design clearly states: "When using the TFP403, some board components are n...
by ceteras
Tue Aug 28, 2012 8:20 am
Forum: Other projects
Topic: HDMI->LVDS converter
Replies: 35
Views: 59570

Re: HDMI->LVDS converter

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 single channel 6bit LVDS interface, be it 20, 30, 40 pins. I've got mine wit...
by ceteras
Sun Aug 26, 2012 3:19 pm
Forum: Other projects
Topic: LCD TFT
Replies: 2
Views: 2563

Re: LCD TFT

@Nelsonbe : You need to contact the ebay seller, tell them your panel's part number so they can check if the display can work with their controller. The panel's native resolution is 1024x600, which the Pi cannot output, so you need to set the Pi at XGA (1024x768) and the controller should do the dow...
by ceteras
Thu Aug 23, 2012 4:10 pm
Forum: Other projects
Topic: on board LCD display
Replies: 5
Views: 3016

Re: on board LCD display

Making an LCD work with the Raspberry Pi is a tremendous amount of work, what ever way you'd be trying to do it. For instance, I believe one could connect this http://www.sainsmart.com/home-page-view/sainsmart-3-2-tft-lcd-display-touch-panel-pcb-adapter-sd-slot-for-arduino-2560.html display to the G...
by ceteras
Mon Aug 20, 2012 2:00 pm
Forum: Other projects
Topic: first design for an hdmi to lvds adapter
Replies: 78
Views: 83498

Re: first design for an hdmi to lvds adapter

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 ...
by ceteras
Mon Aug 20, 2012 12:00 pm
Forum: Other projects
Topic: first design for an hdmi to lvds adapter
Replies: 78
Views: 83498

Re: first design for an hdmi to lvds adapter

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!
by ceteras
Mon Aug 20, 2012 11:35 am
Forum: Other projects
Topic: first design for an hdmi to lvds adapter
Replies: 78
Views: 83498

Re: first design for an hdmi to lvds adapter

If you right click the image and select "View image" you can see a 2,392px × 1,892px version of the image (that's how this forum works). For signals I use Diameter: 0.254, Drill: 0.5 mm. For the parts alignment I think I'm close to perfect, I like how things are positioned: on the left of ...
by ceteras
Mon Aug 20, 2012 10:28 am
Forum: Other projects
Topic: first design for an hdmi to lvds adapter
Replies: 78
Views: 83498

Re: first design for an hdmi to lvds adapter

@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...
by ceteras
Fri Aug 17, 2012 8:19 pm
Forum: Other projects
Topic: first design for an hdmi to lvds adapter
Replies: 78
Views: 83498

Re: first design for an hdmi to lvds adapter

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...
by ceteras
Mon Aug 13, 2012 9:11 am
Forum: Other projects
Topic: first design for an hdmi to lvds adapter
Replies: 78
Views: 83498

Re: first design for an hdmi to lvds adapter

So far, my pcb looks like this, but still there's a lot of work to be done.
Image
I think I will update the image as work is progressing.
by ceteras
Wed Aug 08, 2012 12:49 pm
Forum: Other projects
Topic: Chinese screen
Replies: 3
Views: 1305

Re: Chinese screen

This board is what you need for the display: link . It hooks on the componen output on the RPi. Your display' resolution is 480x234, and that will not be enough for the command prompt nor the UI, but maybe it will work fine in xbmc. I have a couple of these displays (portable dvd's, playstation one ...
by ceteras
Wed Aug 08, 2012 8:47 am
Forum: Other projects
Topic: first design for an hdmi to lvds adapter
Replies: 78
Views: 83498

Re: first design for an hdmi to lvds adapter

I'm working on a solution based on the ADV7611 too, I'm surprised I didn't see this earlier. One huge advantage to this chip is the I2S port, it can extract the sound too, and this is what I'm trying to accomplish. I took a look at EiNSTeiN_'s work, looks fine except for the power decoupling capacit...
by ceteras
Wed Aug 08, 2012 8:43 am
Forum: Other projects
Topic: HDMI->LVDS converter
Replies: 35
Views: 59570

Re: HDMI->LVDS converter

I'd like to mention that I'm OP's first happy customer, I've bought his alpha board and it works like a charm. I use it with an XGA lcd panel, it has a very clear picture, as you can see in the (slightly out of focus) image below. http://cete.ro/images/PI.JPG My currently unfinished RPi rig looks li...
by ceteras
Mon Jul 09, 2012 3:54 pm
Forum: Other projects
Topic: Some ex-PDA screen options
Replies: 3
Views: 3075

Re: Some ex-PDA screen options

The Adafruit display has an integrated TFT driver (HX8340) which can be connected through SPI.
But I don't know if linux drivers exist for it, so the GPU can talk to it through SPI, I think not.
You can write your own software to display stuff on it, though.
by ceteras
Mon Jul 09, 2012 3:37 pm
Forum: Other projects
Topic: Some ex-PDA screen options
Replies: 3
Views: 3075

Re: Some ex-PDA screen options

NEC900 has a DSTN display, Psion5MX's is a grayscale, Psion7 is STN. Hewlett Packard Jornada 680, 690 and 720 are all CSTN. These are all old technologies, I'm not aware of any simple solution to interface the RPi with them. If it would have been TFT LCD, then that would be actually feasible. With T...

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