/vr/ - Retro Games

>>2141583
>I've read that just wiring the two syncs together with a y cable can damage the source, but Idk if thats right.
Yes, i think i said that.
Basically the sync outputs of an GPU could be CMOS drivers, these can connect their output to either ground or power with a very low resistance.
If the output of an CMOS driver is shorted or directly connected to another CMOS output (which has a different state) then too much current can flow and damage them.
It also possible that shorting H and V doesn't result into a good sync.

It's always better to use a circuit, the NPN transistor based one you can find on the internet outputs a logic AND of H and V, and a DC offset.
The simple circuit i designed doesn't need a transistor but (small signal) diodes which are easier to wire up and 5V power (grab it from VGA pin 9 or USB), the output is 500mVpp AC coupled and designed to work with any SCART TV.

>>1978930
>it works just fine.
Nothing is wrong if your TV likes it and can work with it but i expect that some TV somewhere in this crazy world wouldn't like it.
But if someone is to stupid to work with electrical components that have more than 2 pins then he could use what i just designed.
Not tested but i don't see why it shouldn't work unless the sync drivers of an VGA output can't source 10mA.