Re: re: RE: VGA to NTSC conversion

From Wear-Hard Mailing list Archive (WH) Maintained by R. Paul McCarty

My previous setup was a computer ouputting 640x480 @ 60Hz, connected
to a scan converter that put out NTSC, connected to a display. The
display was a Centra Eyetop, which is (I think) 320x240. The eyetop
has a converter box that takes an NTSC signal and converts it a signal
that can be used by the 320x240 LCD.

The chip in the Spy Gear display serves a similar purpose. It takes in
a NTSC signal, which is something like 648x486 (slightly less is
actually viewable), and converts it to signals that can drive the
display. You get the full field of view of the NTSC signal (nothing
gets cut off at the edges), but reduced to a lower resolution (things
are tiny and lacking in detail).

-Abe

On 10/3/07, Justin Shands <> wrote:
> Which brings me to my next question... if I output VGA at 640x480, and this
> box converts it to NTSC... does it show up properly on the display even
> though it's a 300x225 display? Does the NTSC format scale in this fashion?
> Or do I need to output the VGA at 300x225(in which case I would need a scan
> converter which supported this mode)?
>
> Thanks for the tips so far, I should have planned this out more before
> purchasing, but I was excited about the spy car displays being in stock.
>
>  - Justin
>
>
> On 10/2/07, Daniel Tso <> wrote:
> > Justin Shands wrote:
> > > *>Daniel Tso wrote:*
> > >  >I used to get these small VGA->NTSC converters for $40 that worked
> > >  >perfectly fine... not sure if you think they'd be costing a lot
> more...
> > >
> > > Any current examples? The closest I can find is eBay, and even those
> > > seem to be in the 60-80 dollar range, for brands that seem shady and
> > > bulky units.
> >
> > Its unlikely that I can now get those same units, but I do see on ebay
> > a few in the $40 range, including one that is powered from the keyboard
> > socket (5V, just like the previous units I had ... I built a PS/2 to
> > USB cable to power the unit from USB), and another $40 unit that is
> > more flexible in its input (it can apparently accept up to XGA video
> > input):
> >
> >
> http://cgi.ebay.com/NEW-AITech-Web-Cable-PC-VGA-to-NTSC-TV-Scan-Converter_W0QQitemZ200157314682QQihZ010QQcategoryZ3666QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
> >
> >
> http://cgi.ebay.com/Laptop-Mac-PC-VGA-to-TV-S-Video-Converter-1024x768-NTSC_W0QQitemZ190158694559QQihZ009QQcategoryZ3759QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
> >
> > I just bought one of the latter ones to see how well it works...
> > doesn't hurt to have more of these around... :-) (I had 5 of the
> > previous ones, which I used with the old Albatech Personal Monitors
> > HMD's... worked pretty well)...
> >
> >
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> >
>
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