Goto page 1, 2 Next
fuzzymonkey
Guest
Sat Feb 06, 2010 2:39 pm
Hi,
I'm trying to to get my hands on a chip that will convert a VGA signal to
PAL.
I've found a few, but they're discontinued. RsComponents, Maxim, Jaycar and
googling for hours hasn't worked!
Does anyone know where i could a chip that does this?
Thanks
atec 77
Guest
Sat Feb 06, 2010 4:32 pm
fuzzymonkey wrote:
Quote:
Hi,
I'm trying to to get my hands on a chip that will convert a VGA signal
to PAL.
I've found a few, but they're discontinued. RsComponents, Maxim, Jaycar
and googling for hours hasn't worked!
Does anyone know where i could a chip that does this?
Thanks
check whats used in the video output on cctv dvr , should work and will
be cheap
ian field
Guest
Sat Feb 06, 2010 7:49 pm
"atec 77" <"atec 77"@hotmail.com> wrote in message
news:hkjuis$ie3$2_at_news.eternal-september.org...
Quote:
fuzzymonkey wrote:
Hi,
I'm trying to to get my hands on a chip that will convert a VGA signal to
PAL.
I've found a few, but they're discontinued. RsComponents, Maxim, Jaycar
and googling for hours hasn't worked!
Does anyone know where i could a chip that does this?
Thanks
check whats used in the video output on cctv dvr , should work and will be
cheap
If you only want the one, you could salvage a suitable chip from any
computer with a UHF/PAL output, like some of the Commodore models and maybe
Atari.
David L. Jones
Guest
Sun Feb 07, 2010 12:08 am
fuzzymonkey wrote:
Quote:
Hi,
I'm trying to to get my hands on a chip that will convert a VGA
signal to PAL.
I've found a few, but they're discontinued. RsComponents, Maxim,
Jaycar and googling for hours hasn't worked!
Does anyone know where i could a chip that does this?
http://www.analog.com/en/digital-to-analog-converters/video-encoders/ad725/products/product.html
Dave.
--
---------------------------------------------
Check out my Electronics Engineering Video Blog & Podcast:
http://www.eevblog.com
Ray
Guest
Sun Feb 07, 2010 12:24 am
"fuzzymonkey" <fuzzymonkey87_at_hotmail.com> wrote in
news:idKdnckf-_aI_vDWnZ2dnUVZ_sadnZ2d_at_westnet.com.au:
Quote:
Hi,
I'm trying to to get my hands on a chip that will convert a VGA signal
to PAL.
I've found a few, but they're discontinued. RsComponents, Maxim,
Jaycar and googling for hours hasn't worked!
Does anyone know where i could a chip that does this?
Thanks
If you intend to drive a normal TV set, have you considered the scanning
frequencies?
The horizontal is roughly twice as fast as the conventional 15625Hz (64us)
You may well end up with two side by images with half the scan lines!
Ray
fuzzymonkey
Guest
Sun Feb 07, 2010 2:58 am
Actually, that's exactly what happens now! The screen is a small LCD from a
PSone.
pic -
http://www.retroleum.co.uk/wp-content/uploads/2009/05/psonelcd_front.jpg
It can display NTSC or PAL and takes a composite or S-video connection. From
VGA i connected Red, Green, Blue, Ground and HSync to the screen. It shows a
very very blury double image; side by side. I figure it's because the screen
only accepts an interlaced signal and the card outputs a progressive scan
signal... but this is all still new to me so maybe i got it wrong.
If i use something like Dave mentioned
http://www.analog.com/en/digital-to-analog-converters/video-encoders/ad725/products/product.html I
think it would work for what i need.
Anthony
"Ray" <spam_at_spamal.com> wrote in message
news:Xns9D185FAA4A7D9zathranetpacenetau_at_216.151.153.43...
Quote:
"fuzzymonkey" <fuzzymonkey87_at_hotmail.com> wrote in
news:idKdnckf-_aI_vDWnZ2dnUVZ_sadnZ2d_at_westnet.com.au:
Hi,
I'm trying to to get my hands on a chip that will convert a VGA signal
to PAL.
I've found a few, but they're discontinued. RsComponents, Maxim,
Jaycar and googling for hours hasn't worked!
Does anyone know where i could a chip that does this?
Thanks
If you intend to drive a normal TV set, have you considered the scanning
frequencies?
The horizontal is roughly twice as fast as the conventional 15625Hz (64us)
You may well end up with two side by images with half the scan lines!
Ray
fuzzymonkey
Guest
Sun Feb 07, 2010 3:34 am
I have a Sega mega drive. The MB3514 IC is perfect.. except i don't have the
soldering skills to remove the chip without damaging it.
"ian field" <gangprobing.alien_at_ntlworld.com> wrote in message
news:zYhbn.227814$yt6.67285_at_newsfe14.ams2...
Quote:
"atec 77" <"atec 77"@hotmail.com> wrote in message
news:hkjuis$ie3$2_at_news.eternal-september.org...
fuzzymonkey wrote:
Hi,
I'm trying to to get my hands on a chip that will convert a VGA signal
to PAL.
I've found a few, but they're discontinued. RsComponents, Maxim, Jaycar
and googling for hours hasn't worked!
Does anyone know where i could a chip that does this?
Thanks
check whats used in the video output on cctv dvr , should work and will
be cheap
If you only want the one, you could salvage a suitable chip from any
computer with a UHF/PAL output, like some of the Commodore models and
maybe Atari.
fuzzymonkey
Guest
Sun Feb 07, 2010 3:34 am
Still a very cool idea. Thanks.
"ian field" <gangprobing.alien_at_ntlworld.com> wrote in message
news:zYhbn.227814$yt6.67285_at_newsfe14.ams2...
Quote:
"atec 77" <"atec 77"@hotmail.com> wrote in message
news:hkjuis$ie3$2_at_news.eternal-september.org...
fuzzymonkey wrote:
Hi,
I'm trying to to get my hands on a chip that will convert a VGA signal
to PAL.
I've found a few, but they're discontinued. RsComponents, Maxim, Jaycar
and googling for hours hasn't worked!
Does anyone know where i could a chip that does this?
Thanks
check whats used in the video output on cctv dvr , should work and will
be cheap
If you only want the one, you could salvage a suitable chip from any
computer with a UHF/PAL output, like some of the Commodore models and
maybe Atari.
fuzzymonkey
Guest
Sun Feb 07, 2010 3:43 am
Wow i just realised you're Dave from the eevblog! Pays to look at peoples
signatures. Love the video blog!
I was looking a similar chip on rsComponents. So the one you suggested is
great, only problem is the minimum purchase quantity from analog.com is 100!
I only need 1 (or 2 since i'll probably destroy the first one.)
"David L. Jones" <altzone_at_gmail.com> wrote in message
news:0Mlbn.6713$5n.6481_at_newsfe23.iad...
Quote:
David Eather
Guest
Sun Feb 07, 2010 4:37 am
fuzzymonkey wrote:
Quote:
Hi,
I'm trying to to get my hands on a chip that will convert a VGA signal
to PAL.
I've found a few, but they're discontinued. RsComponents, Maxim, Jaycar
and googling for hours hasn't worked!
Does anyone know where i could a chip that does this?
Thanks
http://www.dealextreme.com/details.dx/sku.26804
$31USD
Sylvia Else
Guest
Sun Feb 07, 2010 5:25 am
On 7/02/2010 11:58 AM, fuzzymonkey wrote:
Quote:
The documentation for that chip specifically identifies the need for an
interlaced VGA input at the appropriate size and frequency.
Sylvia.
Jasen Betts
Guest
Sun Feb 07, 2010 6:21 am
On 2010-02-06, fuzzymonkey <fuzzymonkey87_at_hotmail.com> wrote:
Quote:
Hi,
I'm trying to to get my hands on a chip that will convert a VGA signal to
PAL.
I've found a few, but they're discontinued. RsComponents, Maxim, Jaycar and
googling for hours hasn't worked!
Does anyone know where i could a chip that does this?
Thanks
Rohm BH7236AF-E2 (farnell part number 1716147 )
This won't translate the resolution or sync rate, it'll just convert
RGBa+sync to PAL composite. However most VGAs should be capable of
the PAL sync rate
---
news://freenews.netfront.net/ - complaints: news_at_netfront.net ---
fuzzymonkey
Guest
Sun Feb 07, 2010 11:42 am
(resent coz Windows Live Mail is a crap Newsgroup client)
Wow i just realised you're Dave from the eevblog! Pays to look at peoples
signatures. Love the video blog!
I was looking a similar chip on rsComponents. So the one you suggested is
great, only problem is the minimum purchase quantity from analog.com is 100!
I only need 1 (or 2 since i'll probably destroy the first one.)
"David L. Jones" <altzone_at_gmail.com> wrote in message
news:0Mlbn.6713$5n.6481_at_newsfe23.iad...
Quote:
David L. Jones
Guest
Sun Feb 07, 2010 10:26 pm
fuzzymonkey wrote:
Quote:
(resent coz Windows Live Mail is a crap Newsgroup client)
Wow i just realised you're Dave from the eevblog! Pays to look at
peoples signatures. Love the video blog!
I was looking a similar chip on rsComponents. So the one you
suggested is great, only problem is the minimum purchase quantity
from analog.com is 100! I only need 1 (or 2 since i'll probably
destroy the first one.)
You could try getting samples.
Alternatively, Farnell have it in stock in the UK.
Failing that, I might have some lying around somewhere.
Definitely got some on some old boards.
Dave.
--
---------------------------------------------
Check out my Electronics Engineering Video Blog & Podcast:
http://www.eevblog.com
Sylvia Else
Guest
Mon Feb 08, 2010 3:46 am
On 7/02/2010 11:58 AM, fuzzymonkey wrote:
Quote:
It can display NTSC or PAL and takes a composite or S-video connection.
From VGA i connected Red, Green, Blue, Ground and HSync to the screen.
It shows a very very blury double image; side by side. I figure it's
because the screen only accepts an interlaced signal and the card
outputs a progressive scan signal... but this is all still new to me so
maybe i got it wrong.
It's still going to be quite blurry even when it's working perfectly. TV
resolution just isn't that good. You will of course go the S-video
route, rather than composite video, since it produces somewhat better
results.
Sylvia.
Goto page 1, 2 Next
