Go to advanced search

by ceteras
Fri Feb 08, 2013 9:36 am
Forum: Other projects
Topic: JPG Slideshow from Network Share
Replies: 3
Views: 7153

Re: JPG Slideshow from Network Share

I didn't try it, but I think Raspmc has a picture slideshow feature, it sure shoud work from a Windows shared folder.
by ceteras
Fri Feb 08, 2013 9:24 am
Forum: Other projects
Topic: Help on Sharp LQ6AN101
Replies: 5
Views: 2598

Re: Help on Sharp LQ6AN101

You've wired your LM1881N as if signal comes from the LCD connector (pin2, it's an Input for the LM), and sends sync to the D-SUB connector (pins 1 and 3 of the LM are outputs). That is a little confusing, to me at least. This doesn't look like a VGA display to me, more like a TV RGB display (that's...
by ceteras
Fri Feb 08, 2013 9:06 am
Forum: Other projects
Topic: [laptop screen] hdmi - adapter problem
Replies: 2
Views: 1506

Re: [laptop screen] hdmi - adapter problem

Can you post a link to your adapter card so we know what it actually is?

Perhaps your problem comes from display resolution set on the Pi.
You say it works with the PC, then try to also set the Pi resolution in config.txt at the same resolution as the PC.
by ceteras
Fri Jan 25, 2013 10:52 am
Forum: General discussion
Topic: Poor choice of mounting holes: should be 3 mm, not 2.9 mm !
Replies: 29
Views: 29859

Re: Poor choice of mounting holes: should be 3 mm, not 2.9 m

no - they never have said they are mounting holes they have mentioned they can be used as mounting hoes but they are not mounting holes as the 6lasyer board can be damaged by too much pressure on them ;) "Mounting Holes!" [/url] Ok, I'm sorry for the rant, the message was clear back then ...
by ceteras
Fri Jan 25, 2013 10:28 am
Forum: General discussion
Topic: Poor choice of mounting holes: should be 3 mm, not 2.9 mm !
Replies: 29
Views: 29859

Re: Poor choice of mounting holes: should be 3 mm, not 2.9 m

It's worth noting that these are not actually mounting holes - they are holes to help locate the PCB during the manufacturing process (which is why they are the size they are). So although they can be used as mounting holes that is not their primary purpose. That sounds just terrible. When revision...
by ceteras
Wed Jan 23, 2013 10:57 pm
Forum: Other projects
Topic: first design for an hdmi to lvds adapter
Replies: 78
Views: 83583

Re: first design for an hdmi to lvds adapter

Looks good, but "Out of stock", also check comments, it looks like hard to get (expensive shipping).
by ceteras
Wed Jan 23, 2013 11:20 am
Forum: Other projects
Topic: first design for an hdmi to lvds adapter
Replies: 78
Views: 83583

Re: first design for an hdmi to lvds adapter

Those are eagle CAD files, I think. The free version can open them.
by ceteras
Sun Jan 13, 2013 10:40 pm
Forum: Other projects
Topic: Salvaging screen from old portable DVD player (working)
Replies: 76
Views: 39471

Re: Salvaging screen from old portable DVD player (working)

I think it's the AGC (automatic gain control), a part of IR3Y29 that increases the contrast when the signal is weak and decreases when it's too strong. You'll have to live with it because the datasheets don't mention anything regarding tweaking/disabling AGC.
by ceteras
Sun Jan 13, 2013 7:51 pm
Forum: Other projects
Topic: Salvaging screen from old portable DVD player (working)
Replies: 76
Views: 39471

Re: Salvaging screen from old portable DVD player (working)

The strange lcd resolution of 480x234 comes from the NTSC standard, 234 lines is about half the resolution of a NTSC frame (475 lines). PAL has 575 lines so a sub-frame has more than 234 lines and it doesn't fit. I wonder if you can switch the raspi to NTSC and also the lcd display board, perhaps th...
by ceteras
Sun Jan 13, 2013 6:49 pm
Forum: Other projects
Topic: Salvaging screen from old portable DVD player (working)
Replies: 76
Views: 39471

Re: Salvaging screen from old portable DVD player (working)

Perhaps this can help? http://www.raspberrypi.org/phpBB3/viewtopic.php?f=63&t=21831 But I don't think it's worth it. Composite video is interlaced and I believe the driver board only displays one of the two sub-frames (or both even and odd sub-frames, I'm not sure which way is worse). So you can...
by ceteras
Sun Jan 13, 2013 1:54 pm
Forum: Other projects
Topic: Salvaging screen from old portable DVD player (working)
Replies: 76
Views: 39471

Re: Salvaging screen from old portable DVD player (working)

It can't be the power cable. Try to restore the operating system to what was previously.
If that works, look for any relevant config.txt settings that might help.
Also you should try other video sources if you have, like a console or another dvd player, to test the display separately.
by ceteras
Sun Jan 13, 2013 12:46 pm
Forum: Other projects
Topic: Salvaging screen from old portable DVD player (working)
Replies: 76
Views: 39471

Re: Salvaging screen from old portable DVD player

That is awesome! I wanted to follow the same steps on my dvd player, but I haven't got the time, so thank you for allowing me to experiment on your hardware! :D I would go further and identify what the other wires are for and ditch the main board, but I know there are power supplies there for +17, -...
by ceteras
Sat Jan 12, 2013 10:29 pm
Forum: Other projects
Topic: Salvaging screen from old portable DVD player (working)
Replies: 76
Views: 39471

Re: Salvaging screen from old portable DVD player

Follow pin 5 from the I3RY29 in the same way you did for pin 3 before. If it is connected to ground directly, the chip accepts composite. If it goes to a capacitor or directly to one of the two connectors, then it means it's configured for s-video in. The capacitor doesn't have to be electrolytical ...
by ceteras
Sat Jan 12, 2013 9:33 pm
Forum: Other projects
Topic: first design for an hdmi to lvds adapter
Replies: 78
Views: 83583

Re: first design for an hdmi to lvds adapter

I see. You can use an I2C memory chip to store the EDID for the resolutions. Most monitors have these chips on the boards. You can download EDID editors from the internet and generate your data for the memory chips. At least that's how I'd do it. As for CEC, I believe it doesn't work with TFP401, be...
by ceteras
Sat Jan 12, 2013 9:17 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: STICKY: The I2S sound thread. [I2S works]
Replies: 1001
Views: 577731

Re: I2S: Anyone got it running?

Mods should change the title to "I2S: Someone got it running!"
Thank you, Phil!
by ceteras
Sat Jan 12, 2013 9:08 pm
Forum: Other projects
Topic: first design for an hdmi to lvds adapter
Replies: 78
Views: 83583

Re: first design for an hdmi to lvds adapter

I've been looking at the board pictures more closely and I believe I've found exactly what you need to do. Find pin number 5 of IR3Y29 chip, and follow where it goes. We need the chip to accept composite, and for this, pin 5 should be tied to ground. If pin 5 goes to a connector (perhaps the bigger,...
by ceteras
Sat Jan 12, 2013 8:41 pm
Forum: Other projects
Topic: Salvaging screen from old portable DVD player (working)
Replies: 76
Views: 39471

Re: Salvaging screen from old portable DVD player

Congratulations, to me that looks very promising! In my opinion there might be two reasons for the black&white image: 1. the driver board supports both PAL and NTSC, perhaps the board is running in one of the two standards and the Pi in the other. Usually that leads to a BW image. You can try to...
by ceteras
Sat Jan 12, 2013 8:41 pm
Forum: Other projects
Topic: first design for an hdmi to lvds adapter
Replies: 78
Views: 83583

Re: first design for an hdmi to lvds adapter

What do you need I2C for? It seems to me that TFP401 does not need it, the chip is configured with dedicated input pins, tied either low or high. Jumpers would do. I have this board with TFP401 and it works standalone. Good luck! Edit: About the MSB bits, the datasheet says that the majority are sen...
by ceteras
Sat Jan 12, 2013 5:03 pm
Forum: Other projects
Topic: Salvaging screen from old portable DVD player (working)
Replies: 76
Views: 39471

Re: Salvaging screen from old portable DVD player

This is the most delicate part, you need to be careful. Don't get your hopes too high for now, because you still need the dvd electronics to be working and attached to the screen in order to progress (I hope your dvd was at least displaying the home screen or something before you took it apart and t...
by ceteras
Sat Jan 12, 2013 2:23 pm
Forum: Other projects
Topic: Salvaging screen from old portable DVD player (working)
Replies: 76
Views: 39471

Re: Salvaging screen from old portable DVD player

The numbers represent kilo-ohms. There might be a 47 ohm resistor to ground from that track. Your offset is 3ohms so when you have 0.050 you might see a connection from the track to ground. 0.043 can be the same case. So follow only those who are close to 0.003 . A hint: actually the track beyond th...
by ceteras
Sat Jan 12, 2013 1:55 pm
Forum: Other projects
Topic: Salvaging screen from old portable DVD player (working)
Replies: 76
Views: 39471

Re: Salvaging screen from old portable DVD player

Read the numbers on the multimeter's screen when it beeps. To have a direct connection, this number has to be as close to zero as possible. Also check the number when you touch both probes together. The multimeter should show zero, but many multimeters have an offset (an error) and display a positiv...
by ceteras
Sat Jan 12, 2013 12:48 pm
Forum: Other projects
Topic: Salvaging screen from old portable DVD player (working)
Replies: 76
Views: 39471

Re: Salvaging screen from old portable DVD player

http://en.wikipedia.org/wiki/Composite_video Composite on the raspberry pi is the yellow RCA connector, it has only 2 points, one carrying the signal and the other one is the ground. What composite cable are you talking about? You shouldn't ground anything, that could short something. Also do not to...
by ceteras
Fri Jan 11, 2013 11:03 pm
Forum: Other projects
Topic: Salvaging screen from old portable DVD player (working)
Replies: 76
Views: 39471

Re: Salvaging screen from old portable DVD player

cainy393 wrote:Thanks, that sounds very helpful. I'm sorry for being so stupid at this.
What would I do about the other 2 connections on a composite video cable?
The other are the sound usually IIRC.
For this you only need one RCA connector soldered to a shielded cable.
by ceteras
Fri Jan 11, 2013 10:54 pm
Forum: Other projects
Topic: Salvaging screen from old portable DVD player (working)
Replies: 76
Views: 39471

Re: Salvaging screen from old portable DVD player

There will be a point on this track where it will be best to solder a RCA cable to input the video signal from the Pi. But that's not as simple as it sounds. I'm thinking about trying this with a broken dvd player I've got and post step by step instructions. Edit: There might be another way to do th...
by ceteras
Fri Jan 11, 2013 10:31 pm
Forum: Other projects
Topic: Salvaging screen from old portable DVD player (working)
Replies: 76
Views: 39471

Re: Salvaging screen from old portable DVD player

Pin3 should not lead to the copper ribbon. That is, not to the LCD in no way. If you've followed it to one of the 26 pins there, we did some mistake. There are those two connectors on the other side, you need to get there in the end, at one pin on one of them. Do you have a multimeter with the "...

Go to advanced search