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  • Notation questionI wasn't quite sure where to put this post, so anyone's welcome to move it whereever may be more appropriate. So I'm reading about Z80 interrupts he…

    ... ), and operate normally when high (5v, LOGIC 1)
    Quazar Quazar June 2007 Development
  • Notation questionI wasn't quite sure where to put this post, so anyone's welcome to move it whereever may be more appropriate. So I'm reading about Z80 interrupts he…

    ... for logic 1 which is 5V

    It really depends ... to the appropriate 0v or 5v power line (or through say ...
    Quazar Quazar June 2007 Development
  • Notation questionI wasn't quite sure where to put this post, so anyone's welcome to move it whereever may be more appropriate. So I'm reading about Z80 interrupts he…

    ... one that ties /BUSRQ to 5V.
    To select, you then ...
    wilsonsamm wilsonsamm June 2007 Development
  • 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…

    ... /> And if you supply only +5V or 6V on SCART pin ...
    Gods Gods June 2007 Hardware
  • Notation questionI wasn't quite sure where to put this post, so anyone's welcome to move it whereever may be more appropriate. So I'm reading about Z80 interrupts he…

    ... straight to Vcc (i.e. +5v) in the case of an ... 1 (i.e. 0v and +5v, electrically). The third state really ... signal is neither tied to +5v or 0v by the output ... a conductive path from the +5v line to the chip's ... , a path is connected to +5v. Except with NMOS, there is ...
    Winston Winston June 2007 Development
  • My SurplusHere's a list of stuff that I plan to sell. Please let me know if you're interested in any of the items listed below. If you need pictures or more de…

    ... which wire I used for 5V and which for 0V :-(
    hldswrth hldswrth June 2007 Sales
  • My SurplusHere's a list of stuff that I plan to sell. Please let me know if you're interested in any of the items listed below. If you need pictures or more de…

    [QUOTE=hldswrth;199335]
    The transistor looks like this, viewed from underneath:
    [code]
    comp signal
    |
    |
    | o
    Gods Gods June 2007 Sales
  • ZX81 - Modulator problems...Not a spectrum I know, but does anybody here have an experience of repairing ZX81s? When I dusted mine down recently and plugged it in, the display …

    ... of insulation - that's the 5V line).

    You should ...
    hldswrth hldswrth June 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 …

    ... the 7805 to do the +5V regulation and you have the ...
    Gods Gods 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 …

    ... by 7805. It should be 5V of course.

    [QUOTE ...
    Sonic Sonic July 2007 Hardware
  • Spectrum 128 loading volumeToday I recieved my 128k haetsink spectrum, what i noticed is that it needs even higher sound volume for loading through tape than the 48k+. To be mo…

    ... up and down by around +/- 5V ~, and therefore, most stuff that ... is just a train of 5V pulses, some longer than the ...
    DEATH DEATH 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 …

    If 7805 gives 5V but gets overheated, it's usually okay itself but overloaded by shortage in cirquits that powered up from it.
    Sonic Sonic 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 …

    ... output pin (the one with 5V)
    and see the temperature ... and see DC current at +5V line.
    Gods Gods July 2007 Hardware
  • +3 Sound Mod.Hi All, I am very much a novice when it comes to building electronics, but I thought I'd have a go at [url]http://www.geocities.com/sinclair_bitz/st…

    ... at least 7v to produce 5v (my + has a 9v source ...
    Zup Zup July 2007 Hardware
  • +3 broken driveHi, I bought a +3 from E-bay, but the drive doesn't work :( I am not so familiar with Speccys, I know how to program them, but this is the first I'…

    ... the drive may be getting +5v (I really need to check ...
    BruceNorton BruceNorton July 2007 Hardware
  • Eprom blowerdoes anyone know a site with plans for an eprom programmer project that'll blow 27C256s. I attempted to build one called Kisseprom, but the software …

    Right, i just wanted to confirm it.
    Why are the resistor and the diode necessary.... also i can se a green wire conecting pin 1 and 28 together, this is probably for the +5V.
    gtsamour gtsamour July 2007 Hardware
  • Spectrum+3Hi all, Got my Spectrum+3 from eBay this afternoon. Powered it up to find the drive belt is a no go. So I need a drive belt, Ok easy to get hold of n…

    ... PSU from ebay and a 5V regulator :)
    DEATH DEATH July 2007 Hardware
  • Poorly Spectrum + Fault diagnosis help needed!Hi, I've got a Spectrum+. Sometime in the past I broke it and sent it off to be fixed. It came back working good as new, but with an issue 2 board i…

    ... />
    Pin 1: Should show -5v (MINUS 5 volts)
    Pin ...
    Pin 9: Should show +5v

    - If the voltages ...
    Winston Winston July 2007 Hardware
  • Poorly Spectrum + Fault diagnosis help needed!Hi, I've got a Spectrum+. Sometime in the past I broke it and sent it off to be fixed. It came back working good as new, but with an issue 2 board i…

    ... unused pin (top left) from -5V and connected it to 0V ... , and disconnected the +5V pin (bottom left) from +12V ... 0V are now tied, and +5V and A7 are now tied ...
    Phu Phu July 2007 Hardware
  • Does anyone have any working Ferranti's?Does anyone know where I might get hold of a Ferranti ULA5C112E-3?? I think this is the problem with one of my rubber key 48K's as it otherwise wor…

    ... 1 of IC6 should be -5V.

    That is almost ... all the proper voltages except -5V, then it should be D16 ...
    DEATH DEATH July 2007 Sales
  • Does anyone have any working Ferranti's?Does anyone know where I might get hold of a Ferranti ULA5C112E-3?? I think this is the problem with one of my rubber key 48K's as it otherwise wor…

    ... 1 of IC6 should be -5V.

    That is almost ... all the proper voltages except -5V, then it should be D16 ...
    +2MAN +2MAN July 2007 Sales
  • Does anyone have any working Ferranti's?Does anyone know where I might get hold of a Ferranti ULA5C112E-3?? I think this is the problem with one of my rubber key 48K's as it otherwise wor…

    ... you still don't have -5V, it's very hard to ...
    DEATH DEATH July 2007 Sales
  • Spectrum+3Hi all, Got my Spectrum+3 from eBay this afternoon. Powered it up to find the drive belt is a no go. So I need a drive belt, Ok easy to get hold of n…

    ... SMD-380 This is a +5V

    2 Citizen OSDA ... -20E also +5V

    They as far ...
    swift240 swift240 July 2007 Hardware
  • Eprom blowerdoes anyone know a site with plans for an eprom programmer project that'll blow 27C256s. I attempted to build one called Kisseprom, but the software …

    ... pin to be tied to +5V (so the EPROM is not ...
    Marcelo Marcelo July 2007 Hardware
  • Voltage SchmoltageOk then. Don't flame for wanting to use a C64 tape deck for this - it was the only one I have to hand which may be cannibalised for the purpose. So …

    Do you reckon it would be OK to just use 5v there too?
    Because that would of course be the easiest solution. but in that case I suppose the commodores would just use 5v too.
    Maybe I can get some 5v motor from somewhere . . .
    wilsonsamm wilsonsamm July 2007 Chit chat
  • Voltage SchmoltageOk then. Don't flame for wanting to use a C64 tape deck for this - it was the only one I have to hand which may be cannibalised for the purpose. So …

    You're right, the USB allows only 500mA to be drawn at a time.
    Looks like i'll be using a line from the PSU, seeing if only 5v will suffice.
    wilsonsamm wilsonsamm July 2007 Chit chat
  • Voltage SchmoltageOk then. Don't flame for wanting to use a C64 tape deck for this - it was the only one I have to hand which may be cannibalised for the purpose. So …

    ... will raise the output from 5V to 5.7V, appx.
    Marcelo Marcelo July 2007 Chit chat
  • Eprom blowerdoes anyone know a site with plans for an eprom programmer project that'll blow 27C256s. I attempted to build one called Kisseprom, but the software …

    ... itself. There are 12V and 5V flashes. Both have WR pin ...
    Sonic Sonic July 2007 Hardware
  • Voltage SchmoltageOk then. Don't flame for wanting to use a C64 tape deck for this - it was the only one I have to hand which may be cannibalised for the purpose. So …

    ... and 18v) and outputs regulated 5v (or with this diode mod ...
    Winston Winston July 2007 Chit chat
  • External Speccy CommunicationHow does a speccy communicate with the outside world ?? Do you have to have the interface 1 for serial communications ( rs232 ) or are there other p…

    ... module. Besides cheap, it is 5v and 8 bit friendly, and ...
    pmsr pmsr July 2007 Hardware
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