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<1…17181920212223…34>
  • Trying to create NMI, whats this switch?Hi, I have been reading a book Z80 Applications, and I am trying to create a simple device for creating a NMI. Here is a schematic: [url]http://www…

    ... pullups pulls the other to +5V. This circuit is an RS ...
    Alcoholics Anonymous Alcoholics Anonymous October 2007 Hardware
  • Trying to create NMI, whats this switch?Hi, I have been reading a book Z80 Applications, and I am trying to create a simple device for creating a NMI. Here is a schematic: [url]http://www…

    ... are connected via resistors to +5v (logic 1).

    Firstly ... its NMI line tied to +5v through a resistor, to hold ... need a 100K resistor between +5V and NMI in addtion to ...
    Phu Phu October 2007 Hardware
  • Broken 128+2 :(Just got my eBay Speccy through the other day, plugged it in and everything but the red light on the keyboard doesn't come on and there's no connecti…

    ... 7805 regulator IC and this +5V output.
    Gods Gods October 2007 Hardware
  • Broken 128+2 :(Just got my eBay Speccy through the other day, plugged it in and everything but the red light on the keyboard doesn't come on and there's no connecti…

    ... a very accurate and stable +5V at pin 3.

    DEATH DEATH October 2007 Hardware
  • PC power source and Spectrums.I'm planning to use a basic PC ATX power source (300W) for all my sinclair equipment, but I have two questions: - I've read about some nasty things …

    ... 2,5 - 4 A for 5V and 2,5 A for ... BZW06-5V8 parallel to the 5V of +2A and a BZW06 ...
    ingo ingo October 2007 Hardware
  • PC power source and Spectrums.I'm planning to use a basic PC ATX power source (300W) for all my sinclair equipment, but I have two questions: - I've read about some nasty things …

    ... 2,5 - 4 A for 5V and 2,5 A for ... BZW06-5V8 parallel to the 5V of +2A and a BZW06 ...
    DEATH DEATH October 2007 Hardware
  • Broken SpectrumsChaps ( & Mrs Death ), I was looking at getting some dynamic ram chips for the next phase of the Harlequin stuff, and I started thinking...... I've…

    ... , and they only need the 5V line. How to do it ...
    DEATH DEATH October 2007 Hardware
  • PC power source and Spectrums.I'm planning to use a basic PC ATX power source (300W) for all my sinclair equipment, but I have two questions: - I've read about some nasty things …

    ... the speccy. Then removed the +5v regulator and connected the PSU ... 's +5v to the original 5v regulators output pin on ...
    LaesQ LaesQ October 2007 Hardware
  • PC power source and Spectrums.I'm planning to use a basic PC ATX power source (300W) for all my sinclair equipment, but I have two questions: - I've read about some nasty things …

    ... AT style PSU wiith only +5V and +12V (-12V, etc), i ...
    Gods Gods October 2007 Hardware
  • PC power source and Spectrums.I'm planning to use a basic PC ATX power source (300W) for all my sinclair equipment, but I have two questions: - I've read about some nasty things …

    ... high-power resistor to the +5V line as a dummy-load ... psu was connected to the +5V line, and adjusted for a ...
    Pilsener Pilsener October 2007 Hardware
  • Broken SpectrumsChaps ( & Mrs Death ), I was looking at getting some dynamic ram chips for the next phase of the Harlequin stuff, and I started thinking...... I've…

    ... , and they only need the 5V line. How to do it ...
    csmith csmith October 2007 Hardware
  • ZX Spectrum +2 RGB to CGA (RGBI) MonitorI just picked up a spanking brand new Goldstar 1410-CGA with RGBI. It has a 9 pin "D" type connector. 1 Ground 2 Ground 3 Red 4 Green 5 Blue 6 Inte…

    ... really 0 and not really 5V but in original schematic the ...
    ingo ingo October 2007 Hardware
  • Zx Spectrum +2 Datacorder - Discman To Car Cassette Tape AdapterHas anyone tried using a discman to cassette adapter on a ZX Spectrum +2 datacorder and loaded games with a CD or direct from a PC Soundcard?

    ... . I inserted a (reed-) relay (5V) which gets its control current ...
    ingo ingo October 2007 Hardware
  • Look what I got!Look what I just got in the post: [url]http://www.alioth.net/tmp/W5100.jpg[/url] But, please... don't hold your breath :-) Coming to an edge connec…

    ... on the 7805 for the 5v supply to the hard disc ...
    Winston Winston October 2007 Hardware
  • Look what I got!Look what I just got in the post: [url]http://www.alioth.net/tmp/W5100.jpg[/url] But, please... don't hold your breath :-) Coming to an edge connec…

    ... on the 7805 for the 5v supply to the hard disc ...
    LaesQ LaesQ October 2007 Hardware
  • Who has an Issue 1 or Issue 2 Spectrum??Do you have an Issue 1 or 2 Spectrum (ie machines with 5C102E and 5C112E ULA's) ??? You're help is needed! PLEASE SEE THIS THREAD: [url]http://www.…

    First thing to check is -5V, +5V and +12V lines on the ...
    Spirantho Spirantho November 2007 Sinclair Miscellaneous
  • Spectrum ethernet... step 1.1Yeah, a tenth of a step :-) Here's the W5100 board up and WORKING: [url]http://www.alioth.net/tmp/w5100-online.jpg[/url] This is called the "Get Th…

    ... a 3.3v chip with 5v tolerant inputs).[/quote]

    Marcelo Marcelo November 2007 Hardware
  • Faulty +2 Grey :(Hello everyone... i was trying to fix a +2 grey board the other day, i had it for some time now. It gave a black screen (paper and border) with two …

    ... have a picture so the 5V feed is ok. Just cos ...
    DEATH DEATH November 2007 Hardware
  • Faulty +2 Grey :(Hello everyone... i was trying to fix a +2 grey board the other day, i had it for some time now. It gave a black screen (paper and border) with two …

    ... have a picture so the 5V feed is ok. Just cos ...
    gtsamour gtsamour November 2007 Hardware
  • Faulty +2 Grey :(Hello everyone... i was trying to fix a +2 grey board the other day, i had it for some time now. It gave a black screen (paper and border) with two …

    [quote=gtsamour;229516]I still don't understand how come your eprom works without the 2 diodes and the resistor mod...[/quote]

    It's actually pretty simple. I came up with the *same* solution, but implementing a logic OR-Gate in a chip. The ...
    Marcelo Marcelo November 2007 Hardware
  • Floppy Drive on +DHello, I have unfortunately no old drive left, but want run my +D. Problem is that newer drives has no switch anymore for choosing between drive 1 an…

    ... always hook it up to +5V via 10K resistor. This will ...
    Sonic Sonic November 2007 Hardware
  • Floppy Drive on +DHello, I have unfortunately no old drive left, but want run my +D. Problem is that newer drives has no switch anymore for choosing between drive 1 an…

    [QUOTE=Shockwav3;229614]bridging pin 33 & 34 should work[/QUOTE]
    No. 33 is GND, not +5V.
    Sonic Sonic November 2007 Hardware
  • Composite Video output problemHi everyone, I?ve got a problem that?s really bugging me. I have one Spectrum 48K and one Spectrum +3, both with Composite Video output modification…

    ... which provides a stable +5V source. The +5V and +9V are then ... arrangement to derive +12V and -5V.

    The circuit also ...
    Phu Phu December 2007 Hardware
  • Composite Video output problemHi everyone, I?ve got a problem that?s really bugging me. I have one Spectrum 48K and one Spectrum +3, both with Composite Video output modification…

    ... arrangement to derive +12V and -5V.[/QUOTE]

    It's ...
    Winston Winston December 2007 Hardware
  • Speccy plus composite modHi folks, I have 2 48K speccy plus machines both with really poor RF output, one is very weak and the other wanders and white tears across the scree…

    ... . Base pin is at +2.5V voltage, the transistor is alway ...
    Gods Gods December 2007 Hardware
  • Video output (48K)Hello! I've made video mod on my Zx Spectrum. Now the problem of scanning (and tuning) to right channel is history for me. But, now I have another …

    ... transistor via 100 Ohm to +5V. Connect the base of the ...
    ingo ingo January 2008 Hardware
  • I've been having some problems2 Weeks before Christmas the PC went belly-up, so the new Motherboard went in last night and generally things appear to be OK, although the USB wirel…

    There is usually a +5v jumper connection on modern motherboards that can be adjusted. This usually solves that problem. have a look at your mobo manual to see if there is such a jumper and its need.
    The Starglider The Starglider January 2008 Chit chat
  • Does anyone have the CD codemaster pack?Hello [sorry for my poor English] I'm studding the cable of codemaster cd pack [url]http://www.crashonline.org.uk/73/cd.htm[/url] I have some pr…

    ... /> 6 | Joy Button
    7 | +5V
    8 | GND
    9 ... or 50K potentiometers tied between +5V and GND, IIRC.

    Marcelo Marcelo January 2008 Hardware
  • Ethernet blog updated......today, we send our first packet and run into a bit of a gnarly snag: [url]http://spectrum.alioth.net/doc/index.php/Current_events[/url]

    ... the XL) that it's +5V chip?

    Bye
    Jose_Leandro Jose_Leandro January 2008 Hardware
  • Ethernet blog updated......today, we send our first packet and run into a bit of a gnarly snag: [url]http://spectrum.alioth.net/doc/index.php/Current_events[/url]

    Cost and availability. The 5v one is over twice ... than the difference between a 5v XC9572 and a 3. ... and static RAM that was 5v tolerant, I would also ... use that instead of 5v flash/SRAM - it'd ... />
    The W5100 should drive 5v circuits; in fact in memory ...
    Winston Winston January 2008 Hardware
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