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  • Which is the best spectrum to have ?Just wanted to know which is the best Spectrum to have as i know some have more bugs than others. All i wanted it for was to play games on both 48k …

    ... PSU that supplies 5 and 12V directly, as these are produced ...
    Speccyman Speccyman March 2008 Hardware
  • Blown standard divideI recently bought a SIY divide kit from Papaya labs and after i soldered everything, it worked perfectly. I've used it 5-6 times without problems (Fa…

    ... this transistor is only for +12V and -5V and these lines ...
    ingo ingo April 2008 Hardware
  • Blown standard divideI recently bought a SIY divide kit from Papaya labs and after i soldered everything, it worked perfectly. I've used it 5-6 times without problems (Fa…

    ... this transistor is only for +12V and -5V and these lines ...
    gtsamour gtsamour April 2008 Hardware
  • Sat Nav recommendations?I'm going to cornwall on my motorbike. I thought I might like a sat nav. Don't really want to shell out for a bike sat nav, like a tom-tom rider, t…

    ... 'll see about hooking up 12v electrics at some later point ...
    thx1138 thx1138 April 2008 Chit chat
  • Is this a good eprom burner?Just came across this eprom burner: [url=http://www.futurlec.com/EPROMProg.shtml]Futurlec Eprom Burner[/url] I've been looking for an eprom burner …

    ... working on chips that need 12V in which case the sofware ...
    Womble Womble May 2008 Sinclair Miscellaneous
  • Wanted: RGB to RCA for +2AI bought a +2A that, according to the seller, might have a problem with the modulator. When it arrives, I would like to try using the RGB output. The…

    ... +2A and +3 with a +12v signal.

    There are ...
    Zup Zup May 2008 Wanted
  • Spectrum 48K input voltageI have a power supply that is rated 9,5 Volts DC. With no load it outputs about 9,86 Volts. Is it safe to use it for ZX Spectrum 48K? (it can do …

    ... needs 9V to generate the 12V and -5V supplies for the ... by underpowering them on the +12V/-5V lines. So if you ...
    Phu Phu May 2008 Hardware
  • True Spectrum laptop (no emulation)[url]http://user.tninet.se/~vjz762w/[/url] Hi All, I have build a speccy laptop, battery part is not ready yet.... I did it on 2 days, I will put s…

    ... " screen that runs from 10-12v

    I never tough ...
    Cookie Cookie May 2008 Hardware
  • True Spectrum laptop (no emulation)[url]http://user.tninet.se/~vjz762w/[/url] Hi All, I have build a speccy laptop, battery part is not ready yet.... I did it on 2 days, I will put s…

    ... will have an efficient 9-12v to 5v regulation from the ... 3.3v (instead of 9-12v to 3.3v).
    Winston Winston May 2008 Hardware
  • True Spectrum laptop (no emulation)[url]http://user.tninet.se/~vjz762w/[/url] Hi All, I have build a speccy laptop, battery part is not ready yet.... I did it on 2 days, I will put s…

    ... will have an efficient 9-12v to 5v regulation from the ... 3.3v (instead of 9-12v to 3.3v).[/QUOTE]
    csmith csmith May 2008 Hardware
  • connecting 3" flopy disk drive to PClooking at this image: [IMG]http://www.fileden.com/files/2006/9/12/214909/Amiga/3inchFDD_figure.png[/IMG] why are pins 2,4,6 and 14 coneccted to +5V…

    you didn't forget to swap +5V and +12V, right?
    otherwise it would kill most of electronics on 3" FDD.
    I once did that on Amiga A590, but luckily only two DRAM chips were fried.
    orange orange May 2008 Hardware
  • 48K specs boots, but THEN blinking blocks!Of all ZX problems I have seen, the 'blinking blocks' is the most common... Today I picked up a 48K, it boots and THEN it locks filling the screen wi…

    ... supply, bad capacitors (causing excess ripple on the power rails). If ... a scope first, and if ripple is seen replace the electrolytic ...
    Winston Winston May 2008 Hardware
  • 48K specs boots, but THEN blinking blocks!Of all ZX problems I have seen, the 'blinking blocks' is the most common... Today I picked up a 48K, it boots and THEN it locks filling the screen wi…

    ... circuit outputs (+5v, -5v and +12v).

    I had a ...
    csmith csmith May 2008 Hardware
  • broken ZX 48K, help neededI have a broken down ZX 48K :cry: The keyboard membrane is almost completely destroyed, and this is what screen shows on power-on: [IMG]http://www.h…

    ... sure the +5v, -5v and +12v is present in the right ...
    Winston Winston June 2008 Hardware
  • 48k idle soundis there an emulator that emulates the genuine 48k idle hiss/noise (or whatever it's called)? I mean the sound heard when there is no sound, but buz…

    ... chips (for the -5v and +12v lines). I suspect the video ... sound change, since they consume +12v.
    Winston Winston June 2008 Emulators
  • Is it possible to use external power supply for +-12; +-5 for ZX SpectrumRecently I acquired a damaged Sinclair ZX Spectrum, issue 3B. According to the maintenance manual I have to replace TR4 and TR5. These type of transi…

    ... . It doesn't have the -12V (needed for RS232 comm) but ... it has the +5V and +12V, enough to power a +2A ...
    zxbruno zxbruno June 2008 Hardware
  • Is it possible to use external power supply for +-12; +-5 for ZX SpectrumRecently I acquired a damaged Sinclair ZX Spectrum, issue 3B. According to the maintenance manual I have to replace TR4 and TR5. These type of transi…

    ... a circuit diagram of the +12V and -5V power supplies, and ... .

    There is no -12V on 48K Spectrums. It was ... is in fact an unregulated +12V supply from the collector of ...
    Jimmy Jimmy June 2008 Hardware
  • Is it possible to use external power supply for +-12; +-5 for ZX SpectrumRecently I acquired a damaged Sinclair ZX Spectrum, issue 3B. According to the maintenance manual I have to replace TR4 and TR5. These type of transi…

    ... a circuit diagram of the +12V and -5V power supplies, and ... an adjustable power supply upto 12V and 10A. So obviously it ...
    65C02 65C02 June 2008 Hardware
  • Is it possible to use external power supply for +-12; +-5 for ZX SpectrumRecently I acquired a damaged Sinclair ZX Spectrum, issue 3B. According to the maintenance manual I have to replace TR4 and TR5. These type of transi…

    ... disconnecting T2 of IC7 the 12V was very low, and total ...
    65C02 65C02 June 2008 Hardware
  • PSU queryHi all, just one quick question. Are Spectrum PSU's compatible with ZX81's? I've just bought an '81 off of Ebay, which was sold as "working, but the …

    ... the 5V supply to make 12V and -5V, in a similar ...
    Phu Phu July 2008 Hardware
  • PSU queryHi all, just one quick question. Are Spectrum PSU's compatible with ZX81's? I've just bought an '81 off of Ebay, which was sold as "working, but the …

    ... the 5V supply to make 12V and -5V, in a similar ... directly connected to the 4116 +12V power pin, with no regulation ...
    Gods Gods July 2008 Hardware
  • Retro... anythingI suppose this question can be used in relation to Speccies, or C64s, Atari 2600s or any old computer. But it got me thinking after watching some of …

    ... in Sept has radials, and 12v electrics, and beefed up brakes ...
    thx1138 thx1138 July 2008 Chit chat
  • Problem with Discovery OpusI've just got a Discovery Opus, but it seems to be faulty. When I connect the Speccy and switch it on, it displays the "C 1982 Sinclair Research", …

    ... is giving the correct 5V / 12V levels? (To confirm PSU is ...
    Jimmy Jimmy July 2008 Hardware
  • +3 compositve video out problemToday, I've tried to put a composite video out in my +3. I've built the circuit proposed [url=http://www.secarica.ro/html/plus3_hardware.html#composi…

    ... pin 6 in TEA2000).
    - +12v soldered to pin 14 in ... />
    Don't connect the +12V from MC1488 but from TEA2000 ...
    Gods Gods August 2008 Hardware
  • +3 compositve video out problemToday, I've tried to put a composite video out in my +3. I've built the circuit proposed [url=http://www.secarica.ro/html/plus3_hardware.html#composi…

    There is a component (L3, excuse me, I don't know how to say "bobina" in english) between +12v and pin 11... would it be a issue?
    Zup Zup August 2008 Hardware
  • +3 compositve video out problemToday, I've tried to put a composite video out in my +3. I've built the circuit proposed [url=http://www.secarica.ro/html/plus3_hardware.html#composi…

    ... say "bobina" in english) between +12v and pin 11... would it ... "clean" the "analog +12V" form the "digital +12V".
    The video signal ...
    Gods Gods August 2008 Hardware
  • Build your own Pentagon 1024SLAlexey aka KingOfEvil was so kind to give me an english manual for the Pentagon with most (except for the floppy controller) chips adapted to "wester…

    ... little more wrong with the 12V supply and one of the ... explain the problem with the 12V power supply. But we're ...
    Shockwav3 Shockwav3 September 2008 Hardware
  • Sinclair PC 200 - RF questionIs there any compatibility regarding the RF output of the sinclair pc 200? This week i got my 2nd unit and in both of them, when connected through R…

    Check DC voltage at C911 (about 12V), check voltage at Pin3 of IC909 (5V).
    Try to add about 100?F to C911. Use an AC voltmeter and measure at C909. You should measure not more than some mV (
    ingo ingo September 2008 Hardware
  • Z80 ApplicationsI never realised how widely in use the humble Z80 processor was in early Arcade games (Galaga had 3 running in Parallel), Fax Machines, Photocopiers,…

    ... its contemporaries required -5v and +12v rails), and integrated DRAM refresh ...
    Winston Winston September 2008 Hardware
  • Sinclair PC 200 - RF questionIs there any compatibility regarding the RF output of the sinclair pc 200? This week i got my 2nd unit and in both of them, when connected through R…

    ... DC voltage at C911 (about 12V), check voltage at Pin3 of ...
    odious odious September 2008 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

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