by

|   June 27, 2009 at 11:32 PM

Please fix the links to the datasheet and schematic as they point to the DDS chip and board....

by

|   June 28, 2009 at 2:24 PM

Sorry about that. Datasheet link is fixed, schematic will be right tomorrow morning...

by

|   July  1, 2009 at 11:09 AM

Can we get a screen shot of this thing in action? It looks pretty cool, but what can it do?

by

|   July  2, 2009 at 11:30 AM

I used a MAX7456 to make a virtual dash for my car using the OBDII port. I have a video on youtube, search for 'edash virtual dashboard'. I included a link but don't know if it will work??

One thing to watch out for on the MAX is that the character set does not include all ASCII characters, but you can reprogram the font.

http://www.youtube.com/watch?v=pYwoqfysGJA

by

|   October  7, 2009 at 1:55 PM

I have attached video-out from video camera to "Video In" on the OSD board and "Video Out" from the board to the video-in on TV. But it seams that there is no any signal on my TV. So, what's wrong? Should I do something different?

OSD board is getting power from Duemilanove, on +5V/GND pins I have ~4.92V. Unfortunately I can't see output on TV at all. it seems that OSD board is not passing through any video signal. Camera --> TV works OK (on AV3), but Camera --> OSD --> TV does nothng. For tests I use plain DVD handycam and home TV (PAL).

I also tried to disconnect SPI pins, just to power the OSD board and check whether board is transparently passing video signal or not, but it also was unsuccessful.

Is there any way to measure video signal on input and output on the board or understand whether OSD board is properly working or not?

by

|   October  7, 2009 at 11:19 PM

I'm going to take a wild stab here and tell you to make sure that the RST pin is pulled high

by

|   October  8, 2009 at 2:48 PM

Hi,

Thank you very much for the assistance, it's seams that I have
progress in solving problem with my board.

I have just tried to use RESET pin (tied +5V and reset pins for the
short time, just touch them) and it seems that that board works
properly :-) it's a good news. Unfortunately after 4-5 seconds video
output on TV is missing, so I have to tie them again. Does it mean
that RST and +5V pins must be tied permanently?

Regards

by

|   October  8, 2009 at 5:39 PM

Yes. Take a look at the datasheet, page 10, and you'll see reset pulled to +5V in their "Typical Operating Circuit".

FYI, the bar over the reset can be read as "NOT" reset. In other words, when the pin is high (+5V power being applied), you do not have the chip in reset, or in more straightforward terms, you want to use the chip. When this pin is pulled low (to zero), you are resetting the chip.

What you're essentially doing per your description is power cycling the board repeatedly by pulling the pin high for short periods of time, which is why you're getting the sporadic operation.

Cheers...

by

|   January 15, 2010 at 10:54 AM

Any chance we could get the blank PCB only?