wtd:Scan doubler circuit

A

AlecTrician

Guest
I am looking for a design to take some exsisting CGA 15khz to 25khz
TTL monitor source scan rates to VGA , Anyone here seen anything that
might be a place to start?
Converting TTL to analog is not a problem,. its the scan rate.
Al
 
why, why, why?

If you would like to waste money why don't just send me some?

I think all you have to do is change some capacitors, the multi sync
monitors have a bunch of relays they switch over, how big is your CGA? a VGA
14" CRT monitors are dirt cheap now.


"AlecTrician" <intel@mymts.net> wrote in message
news:u7dq61p6lhqdubf5e2p53qbodccg27qvu4@4ax.com...
I am looking for a design to take some exsisting CGA 15khz to 25khz
TTL monitor source scan rates to VGA , Anyone here seen anything that
might be a place to start?
Converting TTL to analog is not a problem,. its the scan rate.
Al
 
I cannot find any present VGA monitors that scan at 15~25khz
A.
why, why, why?

If you would like to waste money why don't just send me some?

I think all you have to do is change some capacitors, the multi sync
monitors have a bunch of relays they switch over, how big is your CGA? a VGA
14" CRT monitors are dirt cheap now.


"AlecTrician" <intel@mymts.net> wrote in message
news:u7dq61p6lhqdubf5e2p53qbodccg27qvu4@4ax.com...
I am looking for a design to take some exsisting CGA 15khz to 25khz
TTL monitor source scan rates to VGA , Anyone here seen anything that
might be a place to start?
Converting TTL to analog is not a problem,. its the scan rate.
Al
Click to expand...
 
On Mon, 25 Apr 2005 13:26:01 -0500, AlecTrician <intel@mymts.net>
wrote:

I am looking for a design to take some exsisting CGA 15khz to 25khz
TTL monitor source scan rates to VGA , Anyone here seen anything that
might be a place to start?
Converting TTL to analog is not a problem,. its the scan rate.
Al
Click to expand...
is this what you're after?
http://elm-chan.org/works/sc/report.html
 
Its close, I may be able to adapt.
Thanks
A
I am looking for a design to take some exsisting CGA 15khz to 25khz
TTL monitor source scan rates to VGA , Anyone here seen anything that
might be a place to start?
Converting TTL to analog is not a problem,. its the scan rate.
Al

is this what you're after?
http://elm-chan.org/works/sc/report.html
Click to expand...
 
When you power up Windows 95-98 in safe mode it is in VGA mode, even if you
have a SVGA monitor,

by the way one or both sync pulses might be inverted between CGA & VGA.



"AlecTrician" <intel@mymts.net> wrote in message
news:g79t61dda6d5cc1i757ikanek803q1ps83@4ax.com...
I cannot find any present VGA monitors that scan at 15~25khz
A.
why, why, why?

If you would like to waste money why don't just send me some?

I think all you have to do is change some capacitors, the multi sync
monitors have a bunch of relays they switch over, how big is your CGA? a
VGA
14" CRT monitors are dirt cheap now.


"AlecTrician" <intel@mymts.net> wrote in message
news:u7dq61p6lhqdubf5e2p53qbodccg27qvu4@4ax.com...
I am looking for a design to take some exsisting CGA 15khz to 25khz
TTL monitor source scan rates to VGA , Anyone here seen anything that
might be a place to start?
Converting TTL to analog is not a problem,. its the scan rate.
Al
Click to expand...
 
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