English Amiga Board - View Single Post - Is there such a thing as a green screen generator?

Stedy · 22 January 2018, 23:39

Hi,

The attached circuit will convert RGB to YPbPr but if you use the Y part, circled in Blue, you'll have a lumuinance signal. I grabbed the circuit from here: http://cds.linear.com/docs/en/applic...ote/an57fa.pdf

If you play about with the 1070R, 549R and 2940R resistors, you can tweak the RGB levels to get the best green level. Feed the output of this to the SCART/RGB to HDMI converter and depending on the converter type, either use the reduced CSync signal (680R in series) if it's SCART input or the composite video signal from the Amiga. Then it should all work.

Ian

22 January 2018, 23:39	#19
Stedy Registered User Join Date: Jan 2008 Location: United Kingdom Age: 46 Posts: 733	Hi, The attached circuit will convert RGB to YPbPr but if you use the Y part, circled in Blue, you'll have a lumuinance signal. I grabbed the circuit from here: http://cds.linear.com/docs/en/applic...ote/an57fa.pdf If you play about with the 1070R, 549R and 2940R resistors, you can tweak the RGB levels to get the best green level. Feed the output of this to the SCART/RGB to HDMI converter and depending on the converter type, either use the reduced CSync signal (680R in series) if it's SCART input or the composite video signal from the Amiga. Then it should all work. Ian Attached Thumbnails