FPGA fun
in [Design]
|
Prev: CONTROLLED DEMOLITION INC explosive-charge placement technician Tom ?Sullivan 911 TESTIMONIAL Video
Next: 74LVC4245A alternative with individual direction?
From: Jan Panteltje on 30 Jun 2010 13:44 On a sunny day (Wed, 30 Jun 2010 15:53:37 GMT) it happened nico(a)puntnl.niks (Nico Coesel) wrote in <4c2b6743.1032603140(a)news.planet.nl>: >They have smaller ones. They are at the bottom of the list (sorted >alphabetically). I will look again. >>that would make about 20 Euro + 20 Euro shipping + import duty + waiting. >> >>I can drive to / order from <you name it conrad.nl bol.com V&D???=> and pick up a 7 inch for 40 Euro now. > >But that probably has a very low resolution. Otherwise I'd like to be >enlightened :-) I may have a hobby project coming up requiring a >640x480 6.1" screen. OK, anyways, I went over to V&D and got myself an 8 inch Kodak for about 49 . This one has a touch interface, not on the screen itself, but on the border so to speak. I bought it because the quality is absolutely stunning, very bright too, colors are correct. The interface is slow, maybe a 4MHz Z80??? hehe. Tried to open it, removed some screws, but so far I have not been able to open it, and I do not want to demolish it, now it is on my desk displaying full earth rising as seen from moon by that Japanese spacecraft, Maybe I will hang it on the wall and go for the DVB-T modulator.. have not decided yet. Of course the resolution is much less then 680x480, but people are so used to rotten de-interlaced B quality low bitrate movies played on HD capable sets... I think this will do for many things. >I suppose so but having a still picture on a display is not going to >do much good. Well, if you use it for example as a scope, and grab a waveform, then you have a still picture. One feature I thought of for the digital scope is to have it beep every time it skips (loses) a trigger :-) LOL I mean if the waveform, or whatever you want to display, MOVES, then it is less sharp anyways, this is the whole idea of MPEG compression, moving things need not be so sharp displayed, so that reduces bandwidth, needs less bitrate. As somebody already pointed out you can get to max bitrate if you 'own' the channel. MPEG2 is really really good above about 6000 kbps.
From: Jan Panteltje on 1 Jul 2010 08:06 Update: You: >>They have smaller ones. They are at the bottom of the list (sorted >>alphabetically). Me: >I will look again. I did, and some are ven more expensive (8 inch) then the bigger ones. You: >But that probably has a very low resolution. Otherwise I'd like to be >enlightened :-) I may have a hobby project coming up requiring a >640x480 6.1" screen. Me: >OK, anyways, I went over to V&D and got myself an 8 inch Kodak for about 49 � . And maybe you like this, the model I bought for 49 � is a Kodak P820. Now I know why it looks so good, as the specs say: Image file formats JPEG, EXIF Dimensions 25.8 � 18.1 � 3.3 cm Weight 577 g Display size 20.3 cm (8 inch) diagonal Display area 17.7 x 9.9 cm Display resolution 800 � 480 pixels <----------------------------------------------------------------- Aspect ratio 16:9 Display type aSi TFT active matrix Display backlight LED Display brightness 300 NITs Contrast ratio 300:1 Supported Memory Card Formats 2 slots - Secure Digital (SD), Secure Digital High Capacity (SDHC), Multimedia Card (MMC), MEMORY STICK (MS), XD-Picture Card (xD), USB drives Power consumption 5.58 W (power on) 0.12 W (standby power) 0.12 W (power off) Power supply 100-120 V AC, 60 Hz (US) 100-240 V AC, 50-60 Hz (WW) 5 V DC Operating temperature 0� to 50� C Storage temperature -20� to 60� C Touch interface Somehow I think you will find it difficult to match that price for similar hardware. 800x480 is better then what you specified. Even if I was to break it open and use the display only, the 5V switching adapter is art by itself. BTW it was priced down at V&D from I think 59 �. This TFT is a way better one then in most other cheap photo frames. Lighting of the screen is very well done too, equal over the whole surface. Sounds almost like a commercial, and indeed I think Kodak deserves some credit for this. It also shows how using products for the masses can take their place in industrial environments. I hope they do a DVB-T like that :-)
From: Nico Coesel on 1 Jul 2010 16:49 Jan Panteltje <pNaonStpealmtje(a)yahoo.com> wrote: >Update: > >You: >>>They have smaller ones. They are at the bottom of the list (sorted >>>alphabetically). > >Me: >>I will look again. > >I did, and some are ven more expensive (8 inch) then the bigger ones. I noticed that too. I bought a 800x600 screen from them to upgrade a Tek TLA704 to 800x600 instead of 640x480. >You: >>But that probably has a very low resolution. Otherwise I'd like to be >>enlightened :-) I may have a hobby project coming up requiring a >>640x480 6.1" screen. > >Me: >>OK, anyways, I went over to V&D and got myself an 8 inch Kodak for about 49 � . > >And maybe you like this, the model I bought for 49 � is a Kodak P820. >Now I know why it looks so good, as the specs say: >Image file formats JPEG, EXIF >Dimensions 25.8 � 18.1 � 3.3 cm >Weight 577 g >Display size 20.3 cm (8 inch) diagonal >Display area 17.7 x 9.9 cm >Display resolution 800 � 480 pixels <----------------------------------------------------------------- >Aspect ratio 16:9 > >Somehow I think you will find it difficult to match that price for similar hardware. >800x480 is better then what you specified. Well its not because it won't fit :-( I may want to replace a approx 6" CRT with a TFT display. >Even if I was to break it open and use the display only, >the 5V switching adapter is art by itself. >BTW it was priced down at V&D from I think 59 �. >This TFT is a way better one then in most other cheap photo frames. >Lighting of the screen is very well done too, equal over the whole surface. 800x480 displays are really cheap these days. Even for low quantities! -- Failure does not prove something is impossible, failure simply indicates you are not using the right tools... nico(a)nctdevpuntnl (punt=.) --------------------------------------------------------------
From: Jan Panteltje on 3 Jul 2010 12:34
On a sunny day (Sat, 03 Jul 2010 14:21:49 GMT) it happened nico(a)puntnl.niks (Nico Coesel) wrote in <4c2f4625.1286269421(a)news.planet.nl>: >This smells like Linux to me as well. I'm just wondering how they fit >a kernel+app in a 2MB flash. They must have stripped the kernel down >quite extensively. Tried to open it again today, no luck. Do not want to damage it. But did some more research, I think they are ATMEL users, and for the touch interface I think perhaps they are using AT42QT2160_DS.pdf. That is a capacitive touch sensor with i2c interface and also a slider bar. I tested for capacitive, and as it also works with a piece of paper in between it must be. Bit later I will hold a scope probe in front and test for the waveforms of that chip :-) ATMEL even mentions 'for photo frames' on their site. >Anyway just report them to the GNU guys. They will take action for >sure! To do that one needs to be very very sure. And I am not the police. I have no other interest then to use it.. The idea of writing your own firmware, as is done for example with the Canon cameras 'chdk' releases, is an interesting one, as then you do not have to flash but can run your own firmware from RAM. As to the FLASH size, the Linksys WAP54G also has 2 MB IIRC and runs a nice Linux (on MIPS), I even have a Linux on a 128 MB stick (very old). Maybe I will discover more about this thing without opening it... |