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I have been looking for a NTSC Composite Video Pattern Generator. A simple B&W is pattern is all I need. I just need to verify that my video input is working. I wanted to make a small pic based one and I have known about http://www.rickard.gunee.com/projects/video/pic/howto.php for a while. Unfortunately he did it in PAL and didn't include the bulk of the source code on how he made his pattern. I don't know enough about TV systems to figure how to convert the signal from PAL to NTSC anyways. Anyone seen this done? |
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composite video pattern generator
Started by ●September 7, 2004
Reply by ●September 7, 20042004-09-07
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----- Original Message ----- From: "Chas Douvier" <> To: <> Sent: Tuesday, September 07, 2004 8:19 PM Subject: [piclist] composite video pattern generator > I have been looking for a NTSC Composite Video Pattern Generator. A > simple B&W is pattern is all I need. I just need to verify that my > video input is working. I wanted to make a small pic based one and I > have known about > http://www.rickard.gunee.com/projects/video/pic/howto.php for a > while. Unfortunately he did it in PAL and didn't include the bulk of > the source code on how he made his pattern. I don't know enough > about TV systems to figure how to convert the signal from PAL to > NTSC anyways. > > Anyone seen this done? Aren't PAL and NSTC monochrome (B&W) the same? Leon -- Leon Heller, G1HSM http://webspace.webring.com/people/jl/leon_heller/ |
Reply by ●September 7, 20042004-09-07
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I may be wrong but I thought PAL was 50Hz and
NTSC was 60Hz.
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Reply by ●September 7, 20042004-09-07
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Here is a pong game for NTSC - it does all the timing to generate horizontal and vertical synch as well as B/W video. I haven't been able to implement it because I am having a problem with my PIC programmer. Should work... http://dt.prohosting.com/pic/pong.html --- In , "Bert Drake" <Bert@D...> wrote: > I may be wrong but I thought PAL was 50Hz and NTSC was 60Hz. > ----- Original Message ----- > From: Leon Heller > To: > Sent: Tuesday, September 07, 2004 2:33 PM > Subject: Re: [piclist] composite video pattern generator > ----- Original Message ----- > From: "Chas Douvier" <chas@i...> > To: <> > Sent: Tuesday, September 07, 2004 8:19 PM > Subject: [piclist] composite video pattern generator > > I have been looking for a NTSC Composite Video Pattern Generator. A > > simple B&W is pattern is all I need. I just need to verify that my > > video input is working. I wanted to make a small pic based one and I > > have known about > > http://www.rickard.gunee.com/projects/video/pic/howto.php for a > > while. Unfortunately he did it in PAL and didn't include the bulk of > > the source code on how he made his pattern. I don't know enough > > about TV systems to figure how to convert the signal from PAL to > > NTSC anyways. > > > > Anyone seen this done? > > Aren't PAL and NSTC monochrome (B&W) the same? > > Leon > -- > Leon Heller, G1HSM > http://webspace.webring.com/people/jl/leon_heller/ > to unsubscribe, go to http://www.yahoogroups.com and follow the instructions > > > ------------------------------- ----------- > Yahoo! Groups Links > > a.. To |
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Reply by ●September 7, 20042004-09-07
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----- Original Message ----- From: Bert Drake To: Sent: Tuesday, September 07, 2004 8:58 PM Subject: Re: [piclist] composite video pattern generator I may be wrong but I thought PAL was 50Hz and NTSC was 60Hz. That doesn't matter with most monitors, they will lock onto the signal OK. Many years ago a friend of mine who lived in Germany sometimes watched the US Forces TV (NTSC) on a B&W PAL TV. The picture was grotty as they were some distance from the transmitter, but it worked. Leon |
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Reply by ●September 7, 20042004-09-07
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>I may be wrong but I thought PAL was 50Hz and NTSC was 60Hz. >That doesn't matter with most monitors, they will lock onto the signal OK. >Many years ago a friend of mine who lived in Germany sometimes watched the >US Forces TV (NTSC) on a B&W PAL TV. The picture was grotty as they were >some distance from the transmitter, but it worked. PAL and NTSC define the method of superimposing colour information on top of the underlying B&W system. Technically, if you're only generating a B&W image then the colour system is irrelevant. What does matter is getting the video info correct. Frames per second, lines per frame, interlacing, timing of horizontal and vertical sync pulses etc. |
Reply by ●September 7, 20042004-09-07
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--- In , "Chas Douvier" <chas@i...> wrote: > I have been looking for a NTSC Composite Video Pattern Generator. A > simple B&W is pattern is all I need. I just need to verify that my > video input is working. I wanted to make a small pic based one and I > have known about > http://www.rickard.gunee.com/projects/video/pic/howto.php for a > while. Unfortunately he did it in PAL and didn't include the bulk of > the source code on how he made his pattern. I don't know enough > about TV systems to figure how to convert the signal from PAL to > NTSC anyways. > > Anyone seen this done? Chas, Unless you just want the experience from building a PIC circuit to do this, why not just use the video output jack of a VCR. Positively a standard NTSC signal, will have the chroma info, but will be ignored by a monchrome system. Mike |
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Reply by ●September 8, 20042004-09-08
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Chas, I don't know if it is any help for you, but check: http://www.web-ee.com/Schematics/PICTetris/PICTetris.htm This guy build a complete tetris game including the video signal generator in one single old 16f84. Kees --- Chas Douvier <> wrote: > I have been looking for a NTSC Composite Video > Pattern Generator. A > simple B&W is pattern is all I need. I just need to > verify that my > video input is working. I wanted to make a small pic > based one and I > have known about > http://www.rickard.gunee.com/projects/video/pic/howto.php > for a > while. Unfortunately he did it in PAL and didn't > include the bulk of > the source code on how he made his pattern. I don't > know enough > about TV systems to figure how to convert the signal > from PAL to > NTSC anyways. > > Anyone seen this done? __________________________________ |
Reply by ●September 8, 20042004-09-08
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Mike, Thanks for the input, of course that comes to mind in every hobbist project. I doubt there are to many projects you do that you save money on, definately if you count the cost of your time. This is for work, but my own personal work. I need something portable and battery powered. I could buy some bar generator online for 399$, money really isn't the issue. I just like to build my own stuff. It gives me a sense of self worth that I didn't buy that oscope on ebay for $250 and dump endless days of fixing a "working" scope, etc. Beats banging my head on my work bench deciding what I want to build next. Charles --- In , "mikerey35475" <mwrey@b...> wrote: > --- In , "Chas Douvier" <chas@i...> wrote: > > I have been looking for a NTSC Composite Video Pattern Generator. A > > simple B&W is pattern is all I need. I just need to verify that my > > video input is working. I wanted to make a small pic based one and > I > > have known about > > http://www.rickard.gunee.com/projects/video/pic/howto.php for a > > while. Unfortunately he did it in PAL and didn't include the bulk > of > > the source code on how he made his pattern. I don't know enough > > about TV systems to figure how to convert the signal from PAL to > > NTSC anyways. > > > > Anyone seen this done? > > Chas, > > Unless you just want the experience from building a PIC circuit to do > this, why not just use the video output jack of a VCR. Positively a > standard NTSC signal, will have the chroma info, but will be ignored > by a monchrome system. > > Mike |
Reply by ●September 8, 20042004-09-08
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Thanks, looks like it used parellex assembler for some pseudo-ops or whatever he called them, so I'll just port around that, plus I'll have to port for a uController that I like working with/can program. 18F252 should work. I am suprised, I would think of anyone on this list you would have number of programmers. I imagine you and Chad Russell with about 30 odd different homebrew and professional programmers, and Wouter w/ double that. Chas --- In , "rtstofer" <rstofer@p...> wrote: > Here is a pong game for NTSC - it does all the timing to generate > horizontal and vertical synch as well as B/W video. I haven't been > able to implement it because I am having a problem with my PIC > programmer. Should work... > > http://dt.prohosting.com/pic/pong.html > > --- In , "Bert Drake" <Bert@D...> wrote: > > I may be wrong but I thought PAL was 50Hz and NTSC was 60Hz. > > ----- Original Message ----- > > From: Leon Heller > > To: > > Sent: Tuesday, September 07, 2004 2:33 PM > > Subject: Re: [piclist] composite video pattern generator > > > > > > ----- Original Message ----- > > From: "Chas Douvier" <chas@i...> > > To: <> > > Sent: Tuesday, September 07, 2004 8:19 PM > > Subject: [piclist] composite video pattern generator > > > > > > > I have been looking for a NTSC Composite Video Pattern > Generator. A > > > simple B&W is pattern is all I need. I just need to verify > that my > > > video input is working. I wanted to make a small pic based one > and I > > > have known about > > > http://www.rickard.gunee.com/projects/video/pic/howto.php for > a > > > while. Unfortunately he did it in PAL and didn't include the > bulk of > > > the source code on how he made his pattern. I don't know > enough > > > about TV systems to figure how to convert the signal from PAL > to > > > NTSC anyways. > > > > > > Anyone seen this done? > > > > Aren't PAL and NSTC monochrome (B&W) the same? > > > > Leon > > -- > > Leon Heller, G1HSM > > http://webspace.webring.com/people/jl/leon_heller/ > > > > > > to unsubscribe, go to http://www.yahoogroups.com and follow the > instructions > > > > > > > > > > > > > > > > > > ----------------------------- -- > ----------- > > Yahoo! Groups Links > > > > a.. To |
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