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  • Remove +12 Volt itemsWhich items can be removed on a ZX48K issue 4b PCB if I don't need the +12 Volt? Micky

    ... to the 7805 section in schematic), except output filter capacitors.
    schematic).

    C50 is input ...
    RetroTechie RetroTechie April 2010 Hardware
  • Timex 2048 documentsHi, I got Timex 2048, seems to work, but no colors on screen :cry:. Neither TV out, nor Composite works. ULA fault ? It seems TC 2048 uses MC 1377 a…

    2068 schematic does not help me much. ...
    kpuchatek kpuchatek April 2010 Hardware
  • Timex 2048 documentsHi, I got Timex 2048, seems to work, but no colors on screen :cry:. Neither TV out, nor Composite works. ULA fault ? It seems TC 2048 uses MC 1377 a…

    [QUOTE=kpuchatek;439746]2068 schematic does not help me much. ...
    retrorepair retrorepair April 2010 Hardware
  • My 1st CPLD project using the Xilinx XC9536Title says it all - for those of you who are considering the use of a CPLD or FPGA (programmable logic) in your electronics ventures, I've documented…

    ... design by drawing a logic schematic.

    Incidentally, if you ...
    Winston Winston April 2010 Hardware
  • Timex 2048 documentsHi, I got Timex 2048, seems to work, but no colors on screen :cry:. Neither TV out, nor Composite works. ULA fault ? It seems TC 2048 uses MC 1377 a…

    ... does not exist in my schematic, so started to look for ... D17 to ULA ? Without valid schematic hard to answer.
    I ...
    kpuchatek kpuchatek April 2010 Hardware
  • Beepola v1.01A new version of Beepoa, v1.01, is now available for download from:- [URL]http://freestuff.grok.co.uk/beepola/Beepola_v1.01.00.zip[/URL] (650KiB) …

    ... need to take General Sound schematic and remove all unneded parts ... 'm able to design the schematic (it should be 5-6 ...
    Shiru Shiru May 2010 Announcements
  • New soundcard for zx spectrum[url]http://translate.google.com/translate?hl=cs&sl=ru&tl=en&u=http%3A%2F%2Fmicklab.narod.ru%2FZXMSoundCard.htm[/url] It's new sound card based on T…

    ... is only three years old schematic with no firmware available, and ...
    Shiru Shiru May 2010 Hardware
  • ZX + 2: Why Audio from RGB Connector ?Does anyone know what is the difference between the standard "tape/sound" output and the audio output inside of the RGB DIN connector? Does the RGB c…

    ... one half modded, because the schematic for the mod isn't ...
    fog fog June 2010 Hardware
  • ZX + 2: Why Audio from RGB Connector ?Does anyone know what is the difference between the standard "tape/sound" output and the audio output inside of the RGB DIN connector? Does the RGB c…

    ... />
    In the original +3 schematic, TR4 has the emitter connected ...
    Zup Zup June 2010 Hardware
  • +3 psu schematics and partsHi everyone. Does anyone have or knows where to get the +3 psu schematic? I'm trying to repair one but i cant find any info on the parts reference. …

    ... /imagenes/Esquema+3.png]this schematic[/url].
    TMX TMX June 2010 Hardware
  • +3 psu schematics and partsHi everyone. Does anyone have or knows where to get the +3 psu schematic? I'm trying to repair one but i cant find any info on the parts reference. …

    ... /imagenes/Esquema+3.png]this schematic[/url].[/QUOTE]

    I ...
    Jose_Leandro Jose_Leandro June 2010 Hardware
  • +3 psu schematics and partsHi everyone. Does anyone have or knows where to get the +3 psu schematic? I'm trying to repair one but i cant find any info on the parts reference. …

    ... is strange connected in this schematic.
    Aha, D7 might look ... somewhere on the internet a schematic of the ZX+3 PSU ...
    TMX TMX June 2010 Hardware
  • USB adaptor for 80s joypadsHas anyone managed to get a USB adaptor for old 80s joypads (with the same pins as a Kempston joystick) to work on the PC for Spectrum emulators? I w…

    is there a schematic for one I wonder.
    fog fog June 2010 Chit chat
  • Timex 2048 documentsHi, I got Timex 2048, seems to work, but no colors on screen :cry:. Neither TV out, nor Composite works. ULA fault ? It seems TC 2048 uses MC 1377 a…

    ... have issue 3 that matches schematic I am going to draw ...
    kpuchatek kpuchatek June 2010 Hardware
  • Damaged sound-output of the spectrum +3Hallo folks, a few days ago I got a Spectrum 128 + 3, but there might be problems with the sound-output. For comparison I have got a Spectrum 128 + …

    ... /> nugget, have you got a schematic of it? errm It's ...
    fog fog June 2010 Hardware
  • +3e ROMs in AT28C256I've been thinking about loading the +3e ROMs in a E2PROM (AT28C256) to make the upgrades easier. It seems that is TTL compatible, and it takes +5v V…

    ... .

    If +2A/+3 schematic shows Vcc (+5V) wired to ...
    RetroTechie RetroTechie June 2010 Hardware
  • RGB to VGA convertor for ZX128/+2/+2A/+3David Luftner release source code (VHDL) of SCANDOUBLER for ZX128/ZX128+2/+2A/+3: [url]http://velesoft.speccy.cz/other/scandoubler-for-zx128_fixed_by…

    ... ). Better way is create new schematic with correct PCB speacially for ...
    velesoft velesoft July 2010 Hardware
  • RGB to VGA convertor for ZX128/+2/+2A/+3David Luftner release source code (VHDL) of SCANDOUBLER for ZX128/ZX128+2/+2A/+3: [url]http://velesoft.speccy.cz/other/scandoubler-for-zx128_fixed_by…

    ... /> If you're remaking the schematic, maybe you can build in ...
    LaesQ LaesQ July 2010 Hardware
  • Broken ZX Spectrum? :(Hi! I bought a 2nd hand ZX Spectrum half a year ago. It worked perfectly fine when I first tried it. I put it back in its box which it was sent in, …

    ... memory (and, more importantly, the schematic!), not too easy to find ...
    Spirantho Spirantho July 2010 Hardware
  • DivIDEI just missed the Ebay listing of some DivIde`s that were available ! :( I`ve contacted the seller if there are any more but have had no replies - so…

    ... (it's bug in Kempston schematic...). But this problem can be ...
    velesoft velesoft July 2010 Wanted
  • DivIDEI just missed the Ebay listing of some DivIde`s that were available ! :( I`ve contacted the seller if there are any more but have had no replies - so…

    ... (it's bug in Kempston schematic...). But this problem can be ...
    Alien 8 Alien 8 July 2010 Wanted
  • Schematics for loading amplifier?I'm interrested in making an external portable amplifier in order to be able to load speccy games using an mp3 player. I looked in the internet but c…

    ...

    Here's the schematic
    [URL=http://img29.imageshack ...
    gtsamour gtsamour July 2010 Hardware
  • Schematics for loading amplifier?I'm interrested in making an external portable amplifier in order to be able to load speccy games using an mp3 player. I looked in the internet but c…

    I made a simple device that I named "PilsenerBox" a while ago.
    It's a combined load/playback-amp.
    Here's the schematic: [URL]http://www.gjelberg.no/miscpics/pilsenerbox_diagram.jpg[/URL]
    Pilsener Pilsener July 2010 Hardware
  • Schematics for loading amplifier?I'm interrested in making an external portable amplifier in order to be able to load speccy games using an mp3 player. I looked in the internet but c…

    ... -amp.
    Here's the schematic: [URL]http://www.gjelberg.no ...
    ingo ingo July 2010 Hardware
  • New stereo audio board for fitting on AY chip - interested?Hi, I developed a small board that fits on the AY chip inside 128K ZX Spectrums: [IMG]http://www.benophetinternet.nl/hobby/vanmezelf/stereo_audio.j…

    ... /> The lower part of this schematic is not needed of course ... circuit, and your values and schematic are much nicer - and take ... is: can I use your schematic?
    I think you have ...
    bverstee bverstee August 2010 Hardware
  • New stereo audio board for fitting on AY chip - interested?Hi, I developed a small board that fits on the AY chip inside 128K ZX Spectrums: [IMG]http://www.benophetinternet.nl/hobby/vanmezelf/stereo_audio.j…

    ... is: can I use your schematic?
    I think you have ... : Every one can use my schematic. Therefore I placed it in ...
    ingo ingo August 2010 Hardware
  • New stereo audio board for fitting on AY chip - interested?Hi, I developed a small board that fits on the AY chip inside 128K ZX Spectrums: [IMG]http://www.benophetinternet.nl/hobby/vanmezelf/stereo_audio.j…

    ... precise values in Ingo's schematic.

    Ingo: can 10K ...
    bverstee bverstee August 2010 Hardware
  • Schematics for loading amplifier?I'm interrested in making an external portable amplifier in order to be able to load speccy games using an mp3 player. I looked in the internet but c…

    ... bit confused... here's the schematic

    [URL=http://img826 ...
    gtsamour gtsamour August 2010 Hardware
  • MB02+IDE aliveLast weekend I finished soldering and testing my MB02+IDE. All items work perfectly on +2 grey, on +2A, on 128k heatsink and on 48k Issue2 and 3b tes…

    ... a good readable and understandable schematic made of simple TTL logic ...
    ingo ingo September 2010 Hardware
  • MB02+IDE aliveLast weekend I finished soldering and testing my MB02+IDE. All items work perfectly on +2 grey, on +2A, on 128k heatsink and on 48k Issue2 and 3b tes…

    ... a good readable and understandable schematic made of simple TTL logic ...
    velesoft velesoft September 2010 Hardware
<1…14151617181920…34>

Latest Posts

  • I am currently watching.....
    Paradigm Shifter on 12:49AM
  • New video about S-video modification on Issue two 48K Spectrum.
    Renegade on April 21
  • Fixed Speccy Software. And which games remained unfixed?
    John Elliott on April 21
  • Happy 40th Birthday to the Amstrad CPC464!
    rich_chandler on April 21
  • Another Birthday! The Game Boy Is 35!
    mel the bell on April 21
  • European Software Titles with an English version
    harriusherbartio on April 21
  • Elusive Strategy Games done by the Smaller or less Prolific Software Houses.
    harriusherbartio on April 21
  • 1992 Spectrum Software
    harriusherbartio on April 21
  • +3 Disk drive motor
    AndyC on April 21
  • Celebrity deaths...
    mel the bell on April 20

HitBox

Word Docs Hits
schematic 1.4K 1.8K

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