Supergun AV with Sony CXA1645

great schematics and write up. will be using this soon.

 

Just for information, the CXA1645 (and 1145 in the same way) are extremely picky with the voltage level on their sync input. The proper voltage at the sync pin is peaks somewhere around 2v.

Because arcade boards are extremely different from each other just keeping a certain margin of tolerance I've added a sync filter based on the LM1881 (which aways output the same TTL level) and a resistive voltage divider.

That would make the image stable in all possible setups and make the RGB encoder board more versatile as it would work with other things as well. :thumbsup: