Hi,
I have just bought Arduino Duemilanove and Breakout for MAX7456 On Screen Display boards from SparkFun’s local distributor and connect them as below:
Duemilanove PINS → MAX7456 OSD PINS
10 —> CS
11 —> DIN
12 —> DOUT
13 —> SCK
5V —> +5V
GND → GND
Compiled sample code found in this thread “Arduino Forum › General › Exhibition › Arduino + MAX7456 OSD” and uploaded it to the Duemilanove board. Then 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?
Sorry for too much questions, I just a software developer and never done any electronics project before. This is my first attempt in this area:-)
Rustam
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?