Hfuy
Joined: 14 Mar 2009
Posts: 11
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| Posted: Sun Aug 02, 2009 1:42 am Post subject: Light guns |
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Do traditional style light guns, as seen on playstations and so on, work with CRT projectors? They don't, of course, work with DLP, LCD or plasma based displays, but the engineering bit of my brain says that they should work with CRT projectors. This would of course be subject to the display chain not doing any oddball retiming or frame-doubling or double-scanning or anything like that (though many lightguns will deal with doublescanned CRT displays).
I'm sure this has been addressed before, but on a forum dedicated to CRT devices, "light gun" is not a productive search!
-P
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damien55
Joined: 20 Oct 2008
Posts: 101
Location: UK
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| Posted: Tue Sep 01, 2009 3:14 pm Post subject: |
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Hi,
My housemate bought a PS2 just to try time crises with two guncon2 on my Barco graphics 808 and guess what.... It works!!!
It is connected to a very basic line doubler (Inline 1424) in composite and output on a RGBHV cable to a gammaX and then to the barco. The lines are indeed doubled by the doubler but the frequency is still 50Hz so it still works. The gun just measures the time between the instant when the white screen is sent and when the scan line is detected by the gun, and because this time is the same in interlaced or progressive it works
On the other hand it doesn't work on my 100hz CRT televison because the image is scanned twice.
My screen is only 1.75m wide and I have to push brightness and contrast to 60 to make it work reliably (I'm usually at 50/50). You also need to be fairly close to the screen, less than 3 meters.
Damien
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