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<1…13141516171819…34>
  • Need advice choosing one of these optionsA few spanish friends are willing to help me build and program the ethernet interface for the Speccy. Here are the possibilities. Any advice would be…

    ... address and a 3.3v voltage regulator and one of those ...
    Winston Winston April 2007 Hardware
  • RGB OutputWas there ever a device available for the 48 that had a RGB output ? As an alternative , what about using a pc monitor (iirc these have seperate syn…

    ... on white is too much voltage (unsure!)
    spider spider April 2007 Hardware
  • RGB OutputWas there ever a device available for the 48 that had a RGB output ? As an alternative , what about using a pc monitor (iirc these have seperate syn…

    ... on white is too much voltage (unsure!)[/QUOTE]

    Couple ...
    piters piters April 2007 Hardware
  • zx spectrum 48k powerpackhi just a quick question for you guys. i have just bought a 48k rubber key'd speccy without a power supply. i have found a power supply in my spares …

    no, not strong enough. Voltage ok, but you need at least an Amp (1000 mA). 2.1mm power plug and centre (hole) must be negative polarity.
    DEATH DEATH April 2007 Hardware
  • RGB OutputWas there ever a device available for the 48 that had a RGB output ? As an alternative , what about using a pc monitor (iirc these have seperate syn…

    ... my monitors present such a voltage!

    Guess I will ...
    Womble Womble April 2007 Hardware
  • RGB OutputWas there ever a device available for the 48 that had a RGB output ? As an alternative , what about using a pc monitor (iirc these have seperate syn…

    ... my monitors present such a voltage[/QUOTE]

    That?s ...
    john58 john58 April 2007 Hardware
  • RGB OutputWas there ever a device available for the 48 that had a RGB output ? As an alternative , what about using a pc monitor (iirc these have seperate syn…

    ... passes it to the onboard voltage regulator to give the 5V ...
    Womble Womble April 2007 Hardware
  • Missing Voltage RegulatorHello all and a very merry 2-days-after-the-speccys-25th-birthday to you all! Okay, I've just received my brand spanking new 48K keyboard membranes …

    Fit a new voltage regulator and heatsink?!?
    MrCheese MrCheese April 2007 Hardware
  • Missing Voltage RegulatorHello all and a very merry 2-days-after-the-speccys-25th-birthday to you all! Okay, I've just received my brand spanking new 48K keyboard membranes …

    The voltage regulator's easy - it's ...
    Winston Winston April 2007 Hardware
  • TIPP31 transistor questionYesterday I had the time to try and repair a 4S issue 48k spectrum I had. First of all I replaced all the electrolytic capacitors. The tr4 transistor…

    ... />
    A final question, for voltage regulator (7805) i used one ...
    gtsamour gtsamour May 2007 Hardware
  • can't find the new modulator design ?I remember seeing on someones site a new schematic for a modulaor that would fit in the modulator case of the old spectrum does anyone know the one …

    Given that you can find one that is small enough, you can also use a modulator from an old VCR, or place the circuitry from a such into the original modulator's case . These only requires composite video and 5 V or 12 V operating voltage to run.
    Pilsener Pilsener May 2007 Hardware
  • TIPP31 transistor questionYesterday I had the time to try and repair a 4S issue 48k spectrum I had. First of all I replaced all the electrolytic capacitors. The tr4 transistor…

    [QUOTE=gtsamour;187043]
    A final question, for voltage regulator (7805) i used one with the indication "L7805CV", is it appropriate?[/QUOTE]

    Yes, it this an 7805 regulator from "ST Microelectronics". :-)
    Gods Gods May 2007 Hardware
  • 48K Speccy not workingHey, A few months ago (hope it&#180;s not to late) I was loading a game into my speccy and from one moment to another it stopped working! I unplugge…

    ... really doesn't output the voltage, do the following:
    1 ... the AC power and measure voltage on a secondary transformer coil ... more. If there's no voltage, then again, your transformer died ...
    Sonic Sonic May 2007 Hardware
  • 48K Speccy not workingHey, A few months ago (hope it&#180;s not to late) I was loading a game into my speccy and from one moment to another it stopped working! I unplugge…

    ... really doesn't output the voltage, do the following:
    1 ... the AC power and measure voltage on a secondary transformer coil ... more. If there's no voltage, then again, your transformer died ...
    DEATH DEATH May 2007 Hardware
  • l.e.d question about zx81hi i know this is a spectrum forum but... ive just repaired my zx81 for the 3rd time and was wondering if it was possible to put a led in to show if …

    ... +5V, this prove than the voltage is present. Also, this is ...
    Gods Gods May 2007 Hardware
  • 48K Speccy not workingHey, A few months ago (hope it&#180;s not to late) I was loading a game into my speccy and from one moment to another it stopped working! I unplugge…

    ... (connecting the PSU and testing voltage on it, if +5V appears ...
    Sonic Sonic May 2007 Hardware
  • TC2068 emulator cart - problemHi, Sorry for posting timex related stuff on a spectrum forum. So, this cart (spectrum emulator) can only adress 16K. I can load small games but i …

    ... together like those chinese multi-voltage transformers.

    It's ...
    odious odious May 2007 Hardware
  • PZX file format draft[QUOTE=Andrew Barker;186084]To this date, there is no rival format for TZX, despite people saying they can do better. Well the challenge is on, prov…

    ... is playing, you get the voltage corresponding to whatever is on ... stop the tape playback, the voltage will change to whatever is ... cable, you'll get the voltage corresponding to the MIC out ...
    Patrik Rak Patrik Rak May 2007 Emulators
  • Unconventional way of diagnosing a faultHi everyone Some time ago I got a 48k Spectrum (issue 3B board) in a pretty bad condition. I believe the power supply transistor TR4 failed, causing…

    ... or 0 (or maybe the voltage changes by something less than ...
    Winston Winston May 2007 Hardware
  • Unconventional way of diagnosing a faultHi everyone Some time ago I got a 48k Spectrum (issue 3B board) in a pretty bad condition. I believe the power supply transistor TR4 failed, causing…

    ... or 0 (or maybe the voltage changes by something less than ...
    Avian Avian May 2007 Hardware
  • Has anyone ever tried this (audio cd's)Last night I was having trouble using tape with my spectrum (see hardware thread) But it got me to thinking, about tape issues. I was wondering if …

    ... mono signal there's no voltage difference between those, so the ...
    gasman gasman June 2007 Sinclair Miscellaneous
  • Has anyone ever tried this (audio cd's)Last night I was having trouble using tape with my spectrum (see hardware thread) But it got me to thinking, about tape issues. I was wondering if …

    ... mono signal there's no voltage difference between those, so the ...
    Toxitalk Toxitalk June 2007 Sinclair Miscellaneous
  • Making your own joystick interfaceJust spied the diagram for the kempston joystick interface in the docs section. For someone who has only made up cables, what is involved in constru…

    ... notice need a significant negative voltage for Vee, so the 0v ...
    Winston Winston June 2007 Hardware
  • Composite vs SCARTIs there a significant difference from using AV composite video and RGB SCART video? I have played various games with composite, then on RGB, and th…

    ... is 4.7Koms, so final voltage is +10V and for scart ... is 75 Ohms, so final voltage is +1V. :smile:

    Gods Gods June 2007 Hardware
  • Interface 1 electrolytic capacitorsInterface 1 has three 47&#956;F electrolytic capacitors. Is it necesary to replace them with fresh ones? I always do this with old speccys but is it…

    ... .1uF-1.6F
    Maximum voltage: 3-600
    Accuracy: Terrible ...
    Winston Winston June 2007 Hardware
  • Computer crashes on boot problemHelp, I need help !! My Computer crashes randomly, sometimes just after start-up sometimes it will last for ages. I then get the Blue screen with…

    ... supply enough power (and the voltage sagging when the disk tries ...
    Winston Winston July 2007 Chit chat
  • ZX Spectrum 128+ problemsHello!I recently purchased and got myself a spectrum 128+ from ebay.The item did not have an original power supply so i got a power supply of 9volts …

    ... bought not supplying the right voltage, before it exploded :D). Even ...
    gtsamour gtsamour July 2007 Hardware
  • ZX Spectrum 128+ problemsHello!I recently purchased and got myself a spectrum 128+ from ebay.The item did not have an original power supply so i got a power supply of 9volts …

    ... . Possibly you have killed the voltage regulator only, possibly far worse ...
    Womble Womble July 2007 Hardware
  • ZX Spectrum 128+ problemsHello!I recently purchased and got myself a spectrum 128+ from ebay.The item did not have an original power supply so i got a power supply of 9volts …

    ... . Possibly you have killed the voltage regulator only, possibly far worse ...
    gtsamour gtsamour July 2007 Hardware
  • ZX Spectrum 128+ problemsHello!I recently purchased and got myself a spectrum 128+ from ebay.The item did not have an original power supply so i got a power supply of 9volts …

    ... your PSU really produces stabilized voltage. This can be done by ...
    Sonic Sonic July 2007 Hardware
<1…13141516171819…34>

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  • Missing Voltage RegulatorHello all and a very merry 2-days-after-the-speccys-25th-birthday to you all!<br /> <br /> Okay, I've just received my brand spanking new 48K keyboar…
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