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I'm having the same issue and I think is the same as in https://github.com/ramapcsx2/gbs-control/issues/128 and the same problem solved on input here: https://github.com/ramapcsx2/gbs-control/issues/152 As you can see for 480p it...

Hi @datamattsson, It is confirmed, I've tried yesterday on a livestream to implement the sync combiner circuit and it works flawlessly. The source was a 480p Dreamcast providing RGBHV and...

Here you have the wiring, I put this board inside a DB15 female connector and used the P11 header.  3.2V/3.3V sync with these values.

@gingerbeardman, sorry for the delay, for the input resistors and caps I can see on the other schematics 2.2k and 22uF 10v (Electrolytic), I've tried these values too and it...

I have some pictures of the temporary setup, this works as intended. The only problem I see are the big fat black lines between scanlines, **is it possible to change...

I think @necroware is right, @Danexmurder you can try cutting the trace of pin 9 and soldering the 5v from the GBS to the chip VCC (or 3.3v, check your...