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dgottesm

VGA, YPbPr, Basys3

Question

The Basys3 manual says that the VGA analog outputs can drive between 0 and 0.7 volts. 

Does anyone know if, from a purely analog perspective, this can drive “component video”, or video in YPbPr, by using the outputs normally used for RGB for YPbPr? Obviously I would have to play with the Y to implement “sync on Y”

In the end, I would connect a simple VGA to component cable and connect to s component screen

Edited by dgottesm

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Hi @dgottesm,

I believe it is possible from a pure analog  as long none of the signals in the RGB analog go above 0.7 V, though none of us at Digilent have ever attempted this.

thank you,

Jon

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On 5/30/2018 at 11:16 PM, jpeyron said:

Hi @dgottesm,

I believe it is possible from a pure analog  as long none of the signals in the RGB analog go above 0.7 V, though none of us at Digilent have ever attempted this.

thank you,

Jon

@jpeyron

Aye, there’s the rub. Sync on Y/green requires another 300 mv.

I asked the question as well on stackexchange.

https://electronics.stackexchange.com/questions/376891/ypbpr-vga-basys3

there is an interesting idea there about level shifting the Y and adding a switch..

I ordered the appropriate cable... I will write a basic video generator... We will see what happens

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