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Search Again :: Adv Search 37 results in 0.000s
<12>
  • ZX81 back porch fix using LM1881Hello! Has anyone here did the back porch fix for ZX81 using LM1881? I did it this weekend and instead of clear black on white i got black on dark g…

    ... porch fix for ZX81 using LM1881?
    I did it this ... just a normal output on LM1881 + BAT46. However, it did not ... using the original schematic with LM1881 (which used 3 buffers out ... /back porche pin output on LM1881 on my scope here is ...
    ArtemKuchin ArtemKuchin July 2012 Hardware
  • s-video SuccessHaving tried the various composite video fixes for the +3 etc, I was left feeling a little cold at the results, and was about to give up my quest for…

    ... constructed the interface (minus the LM1881), and the result is very ...
    dasteph dasteph April 2004 Sinclair Miscellaneous
  • SCART Lead and C= 1940 MonitorHi, I've decided to make a SCART lead for my +3 I've been doing a lot of searching on the internet and forums but I'm a little confused as some peop…

    ... 've seen mentions of the LM1881 chip and once found a ...
    links links December 2006 Hardware
  • Sinclair +2 to VGA without VGA boxA few days ago someone in a Spanish forum mentioned that his friend claimed to have built a cable to connect his Sinclair +2 to a VGA monitor without…

    ... /> Amstrad Sinclair RGB 15Khz>---------- LM1881 ----------> 30Khz VGA.

    LM1881.html[/url]

    Would ...
    zxbruno zxbruno August 2007 Sinclair Miscellaneous
  • velleman k8036 - Video signal cleaning?http://www.velleman.eu/products/view/?country=es&lang=en&id=348080 Although velleman reports having discontinued this kit and its primary use was …

    ... ? Any thoughts? (Is that a LM1881 I seen in there?)
    Renegade Renegade November 2015 Hardware
  • +2a / +3 rgb csyncI want to separate the csync signal comming from the RGB port into vsync and hsync. Dose anyone have a circuit diagram, parts list etc of how to do t…

    Try an integrated sync separator, like LM1881.
    Look here [url="http://www.chipcatalog.com/Cat/224.htm"]http://www.chipcatalog.com/Cat/224.htm[/url]

    Cristi
    secarica secarica January 2004 Sinclair Miscellaneous
  • +2a / +3 rgb csyncI want to separate the csync signal comming from the RGB port into vsync and hsync. Dose anyone have a circuit diagram, parts list etc of how to do t…

    ... a SYNC splitter using the LM1881 but with limited results see ...
    dasteph dasteph January 2004 Sinclair Miscellaneous
  • Spectrum AV Lead?I own a Specci +2a and someone kindly made me a scart lead many moons ago. Now I want to use my specci with a Commodore 1084 monitor which only has A…

    ... an RGB cable using an LM1881 chip (video sync seperator) to ...
    KeepGood KeepGood December 2005 Hardware
  • SCART Lead and C= 1940 MonitorHi, I've decided to make a SCART lead for my +3 I've been doing a lot of searching on the internet and forums but I'm a little confused as some peop…

    ... . I was looking at the LM1881 to see if I could ... be no trouble using the LM1881 though.

    This page ... H/VSYNC stuff using a LM1881:
    [url]http://www.tkk ...
    Jmk Jmk December 2006 Hardware
  • SCART Lead and C= 1940 MonitorHi, I've decided to make a SCART lead for my +3 I've been doing a lot of searching on the internet and forums but I'm a little confused as some peop…

    ... H/VSYNC stuff using a LM1881:
    [url]http://www.tkk ...
    links links December 2006 Hardware
  • Sinclair +2 to VGA without VGA boxA few days ago someone in a Spanish forum mentioned that his friend claimed to have built a cable to connect his Sinclair +2 to a VGA monitor without…

    ... /> Amstrad Sinclair RGB 15Khz>---------- LM1881 ----------> 30Khz VGA.
    [/QUOTE ... ]

    No. The LM1881 can only separate H and ...
    Gods Gods August 2007 Sinclair Miscellaneous
  • Sinclair +2 to VGA without VGA boxA few days ago someone in a Spanish forum mentioned that his friend claimed to have built a cable to connect his Sinclair +2 to a VGA monitor without…

    ... /> in the 23p outlet. One LM1881, two "inverter" buffers for H ...
    Gods Gods August 2007 Sinclair Miscellaneous
  • Sinclair +2 to VGA without VGA boxA few days ago someone in a Spanish forum mentioned that his friend claimed to have built a cable to connect his Sinclair +2 to a VGA monitor without…

    ... in the 23p outlet. One LM1881, two "inverter" buffers for H ... have to, I think an LM1881 and a PLL frequency doubler ...
    Marcelo Marcelo August 2007 Sinclair Miscellaneous
  • Sinclair +2 to VGA without VGA boxA few days ago someone in a Spanish forum mentioned that his friend claimed to have built a cable to connect his Sinclair +2 to a VGA monitor without…

    ... have to, I think an LM1881 and a PLL frequency doubler ...
    Gods Gods August 2007 Sinclair Miscellaneous
  • IC Suppliers(of ICs other than those in the big box...) Do any of the people into hardware assembly here know of any suppliers of obscure yet in-production ICs …

    ... pulses, to which the ubiquitous LM1881 would probably come in useful ...
    Phu Phu August 2007 Hardware
  • Timex 1000 PAL conversionHi, a friend of mine sent me a Timex 1000 from the US. I was prepared for the NTSC/PAL issues so no surprise came to me when i got a shadowy dark scr…

    ... should be available using the LM1881 IC.

    Ingo ...
    ingo ingo January 2009 Hardware
  • Timex 1000 PAL conversionHi, a friend of mine sent me a Timex 1000 from the US. I was prepared for the NTSC/PAL issues so no surprise came to me when i got a shadowy dark scr…

    ... should be available using the LM1881 IC.

    Ingo.[/QUOTE ...
    Jose_Leandro Jose_Leandro January 2009 Hardware
  • Timex 1000 PAL conversionHi, a friend of mine sent me a Timex 1000 from the US. I was prepared for the NTSC/PAL issues so no surprise came to me when i got a shadowy dark scr…

    Using the LM1881 and some additional parts one ... from the good one. The LM1881 synchronizes to the signal and ...
    ingo ingo January 2009 Hardware
  • RBG monitor for Spectrum?I'm using a very old TTL RGB monitor with my Spectrum, with a RGB adapter that I made many years for my Sinclair QL. It works perfectly with my QL, b…

    ... using, does it have a LM1881 sync separator? Or your monitor ...
    mcleod_ideafix mcleod_ideafix September 2009 Hardware
  • What spectrum?I am going to have a gent send me some Spectrum hardware in the future. Me being a american and knowing nothing of the sort, what would be the best o…

    ... electronic wizzardy, like using an LM1881 to get separate H and ...
    mcleod_ideafix mcleod_ideafix December 2011 Hardware
  • Spectrum +3 into a Microvitec CUB 452 MonitorSo nearly had this working! Had a lead made up for me that should have worked but the wiring was a bit off, after a bit of messing around and search…

    looks to me like you need a video sync separator, sucj as the LM1881 [url]http://www.gamesx.com/misctech/lm1881.htm[/url] since as the monitor is expexting separate vertical and horizontal syncs but the zpeccy only output composite sync

    HTH
    andy_rea andy_rea May 2012 Hardware
  • ZX81 back porch fix using LM1881Hello! Has anyone here did the back porch fix for ZX81 using LM1881? I did it this weekend and instead of clear black on white i got black on dark g…

    I'm building one this video fixers, using a variation of the LM1881 circuit, designed by Jose Leandro. I will post my results once it's complete.
    mcleod_ideafix mcleod_ideafix July 2012 Hardware
  • ZX81 back porch fix using LM1881Hello! Has anyone here did the back porch fix for ZX81 using LM1881? I did it this weekend and instead of clear black on white i got black on dark g…

    ... , using a variation of the LM1881 circuit, designed by Jose Leandro ...
    ArtemKuchin ArtemKuchin July 2012 Hardware
  • ZX81 back porch fix using LM1881Hello! Has anyone here did the back porch fix for ZX81 using LM1881? I did it this weekend and instead of clear black on white i got black on dark g…

    ... back porch generated by the LM1881. R1 along with R2 are ... -coupled just before entering the LM1881 chip.
    mcleod_ideafix mcleod_ideafix July 2012 Hardware
  • ZX81 back porch fix using LM1881Hello! Has anyone here did the back porch fix for ZX81 using LM1881? I did it this weekend and instead of clear black on white i got black on dark g…

    This is very similar to the ZXVid solution I produce. Main difference is that my custom PCB is a bit smaller - we made it to fit into the modulator casing.

    The LM1881 works really well, on all TVs I've seen so far!
    Spirantho Spirantho July 2012 Hardware
  • ZX81 with black screen and some white dots.Was gearing up to do a composite video mod on my ZX81, and today was going to be it. Unfortunate when started my ZX81 seems faulty. I get a back scre…

    ... see, it only requires a LM1881, a transistor (the same you ...
    mcleod_ideafix mcleod_ideafix July 2012 Hardware
  • ZX81 with black screen and some white dots.Was gearing up to do a composite video mod on my ZX81, and today was going to be it. Unfortunate when started my ZX81 seems faulty. I get a back scre…

    ... could very well squeeze the LM1881 and the extra parts in ...
    pmsr pmsr July 2012 Hardware
  • ZX81 with black screen and some white dots.Was gearing up to do a composite video mod on my ZX81, and today was going to be it. Unfortunate when started my ZX81 seems faulty. I get a back scre…

    ... could very well squeeze the LM1881 and the extra parts in ... Spectrum doesn't need any LM1881 fix to properly output composite ...
    mcleod_ideafix mcleod_ideafix July 2012 Hardware
  • ZX81 with black screen and some white dots.Was gearing up to do a composite video mod on my ZX81, and today was going to be it. Unfortunate when started my ZX81 seems faulty. I get a back scre…

    ... Spectrum doesn't need any LM1881 fix to properly output composite ...
    pmsr pmsr July 2012 Hardware
  • (mini)monitor for speccy?hey guys, need a tip or hint for a mini monitor - which to use with Speccy? brand/type/parametres? preferably cheap solutions and where to get them. …

    ... to VSync/HSync with the LM1881 but no luck again. Although ... MKII with Syncs separated by LM1881, it gives a really clean ...
    AlfaRomeo AlfaRomeo January 2013 Hardware
<12>

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