World of Spectrum
  • Categories
  • Discussions
  • FAQ
  • Sign In
Home › Search
Title Search
@title beer Word 'beer' in title
User Search
  • @user admin Only posts by Admin
Text Search
  • @body beer Word 'beer' in the text
Phrase Search
"Hello World" Exact phrase match
Exclude Terms
  • car -red Search cars that are not red
"Or" Searches
  • honda | bmw 'honda' or 'bmw' results
Multi-Field
@(title,body) hello Both contain 'hello'
WildCard
  • hond* civ* Match all with an astrix
Combination
  • @title bmw @user admin
See more supported syntax examples
Search Again :: Adv Search 1000 results in 0.005s
<1234567…34>
  • Modifying a speccy to +5v only operation.Just a thought experiment so far. Let's say i wanted to make a more resilient spectrum by getting rid of the DC-DC converter circuit. This would remo…

    ... would remove the -5v and +12v rails from the speccy. The ... use upper pin 22/23 (12v DC / 12v AC).
    I would fit ... guess i could fit a 12v version as well, and power ...
    Rorschak Rorschak October 2019 Hardware
  • blew up my 128i did it - damn. i accidentally reverted the polarity of the power power supply, so ended up with a blown 5v stabilizer, which i replaced, but there …

    ... case you don't have 12V AC in your speccy, so it ...
    zoom zoom December 2001 Sinclair Miscellaneous
  • +3 external floppyI'd like to connect 3,5" PC floppy drive (NEC) to ZX Spectrum +3 (with diode for RDY). Here are questions: 1) It seems the PC floppy uses just +5V, …

    ... , what about using those small AC->DC converters. I've ... thats has written 1.5 - 12V AC-DC STABILIZER, and gives option ... />
    max. current is 1000mA@12V, guess at least that should ...
    orange orange March 2007 Hardware
  • +3 external floppyI'd like to connect 3,5" PC floppy drive (NEC) to ZX Spectrum +3 (with diode for RDY). Here are questions: 1) It seems the PC floppy uses just +5V, …

    ... , what about using those small AC->DC converters. I've ... thats has written 1.5 - 12V AC-DC STABILIZER, and gives option ... />
    max. current is 1000mA@12V, guess at least that should ...
    piters piters March 2007 Hardware
  • Second Hand SpectrumHi just joined the Forum. I have picked up a Spectrum at a s/h shop and would like some advice please. I have had two ZX81's packed away for severa…

    ... Spectrum[/I] that uses the +12V. The exact value isn't ... unregulated DC voltage, and a +/- 12V AC generated by the voltage conversion ...
    RetroTechie RetroTechie October 2011 Hardware
  • Dead 128K heatsinkUnfortunately my 128K heatsink died suddenly and with no apparent reason. I had the Kempston Pro interface connected and when i powered it on the ztx…

    ... remove R137 to disconnect the 12v ac connection. (which is used to ... generate the -12v and -5v supplies).
    I ...
    guesser guesser November 2011 Hardware
  • SpecDrum on later Spectrums?Would one of you happen to know if the Cheetah SpecDrum interface can be used on the later Spectrum models, or is it for the 48K only?

    If the SpecDrum does not have it's own internal ROM, it's I/O port addresses do not clash (unlikely but possible) and does not need the 9V or 12V ac ( also shown as -12V) supplies it may work.
    1024MAK 1024MAK January 2013 Hardware
  • +2 (Grey) and AT/ATX PSUAny ideas on the best way to power a grey +2 board from an AT or ATX PSU? Looking at the schematic, I could do this one of two ways... 1: Bypass th…

    ... minimum to provide +5v and +12v. If you want the serial ... also need to supply the -12v. There is no pin on ... to inject it on the "12V AC" pin, and make sure that ... get it out on the -12v line.

    I personally ...
    guesser guesser February 2013 Hardware
  • Harlequin - usefull mods and addsHello, I start here a thread regarding mods and adds for the Harlequin. It was found: * that the Sinclair Interface 1 does not fully work at the Ha…

    ... line (to "B20") and the -12V line (to "B23") need to ... or B22 is +12V and 22B or B22 is 12V AC = "-12V"

    ingo ingo May 2014 Hardware
  • Harlequin - usefull mods and addsHello, I start here a thread regarding mods and adds for the Harlequin. It was found: * that the Sinclair Interface 1 does not fully work at the Ha…

    ... or B22 is +12V and 22B or B22 is 12V AC = "-12V"
    [/QUOTE ... twice! :oops: The latest one (-12V) is definitely at 23B/B23 ... AC voltage to be directed to -12V"? Isn't it a stable -12V ...
    lfaria lfaria May 2014 Hardware
  • Harlequin - usefull mods and addsHello, I start here a thread regarding mods and adds for the Harlequin. It was found: * that the Sinclair Interface 1 does not fully work at the Ha…

    ... line (to "B20") and the -12V line (to "B23") need to ... B22 is +12V and 22B or B22 is 12V AC = "-12V"[/QUOTE]
    No ... , I mean you have labelled the -12V ... of the 79L05 regulator as "-12V ==> B23"...:o

    1024MAK 1024MAK May 2014 Hardware
  • Powering a Spectrum with 5v?I live in the States, but I'm originally from England. My original Spectrum is still at my mum's house in the UK, and I was thinking of asking her t…

    ... 5v was stepped up to 12v to power the ram?

    The +12V and -5V (and the ~12V "AC") supplies are actually ... a PSU that outputs +5v, +12V and -5V. And then some ...
    1024MAK 1024MAK August 2014 Hardware
  • Hot plugable edge connector?Could the spectrum's edge connector have been made hot plugable without adding much to the manifacturing costs? I was thinking along the lines of a…

    ... ) often use the +12V and either the ~12V AC (to generate -12V) or the ...
    1024MAK 1024MAK September 2014 Hardware
  • z80 reverse engineeringI came across Ken Shirriff's blog today where he is reverse engineering the Z80 from images of a Z80 die. I guess this may be of interest to those of…

    ... proximity of /M1 and the 12v AC line on the edge connector ... /WAIT which is next to +12v DC (for example) would be ...
    zub zub October 2014 Hardware
  • Cooking toastrack... the dreaded smellI powered up my Spectrum 128 (heatsink model) yesterday only to see what looked like an out-of-tune picture on the television. I'm using a scart adap…

    ... , and the output is a 12v AC signal which gets rectified to ... give the +12v rail.
    It seems a ...
    guesser guesser January 2015 Hardware
  • Cooking toastrack... the dreaded smellI powered up my Spectrum 128 (heatsink model) yesterday only to see what looked like an out-of-tune picture on the television. I'm using a scart adap…

    ... 23B is the 12V AC line (often shown as -12V or ~12V, which is ...
    1024MAK 1024MAK January 2015 Hardware
  • PSU replacement for +2a/+3Hi, With the suitable connector does a PC power supply can be used to power a ZX+2a/+3 ? Thanks

    ... , the -12V is suppose to be ~12V, with the ~ meaning AC. This was ... to generate this 12V AC supply anyway. Instead the -12V is present here ...
    1024MAK 1024MAK September 2015 Hardware
  • Interface 1 RS232 Just Speccy 128 (again)ok so i started this post in the wrong section so here it is again. [b]thesender[/b] [i]Im a little perplexed I have a 48k Spectrum+ with Interfa…

    ok 1024MAK on another forum found the problem for me [i]+12V supply on edge-connector pin A22 AND the 12V AC supply on pin A23. The AC signal on pin A23 goes through a capacitor and is then converted to a -12V DC supply for the serial port circuitry.[/i]
    thesender thesender March 2017 Hardware
  • what components normally get taken out if you plug+unplug a joystick interface in with the power onwhat components normally get taken out if you plug+unplug a joystick interface in with the power on? i remember doing this a few times when i had …

    ... on the edge-connector (+12V, +9V, -5V and 12V AC). Some of which ...
    1024MAK 1024MAK October 2018 Hardware
  • Modifying a speccy to +5v only operation.Just a thought experiment so far. Let's say i wanted to make a more resilient spectrum by getting rid of the DC-DC converter circuit. This would remo…

    ... (12v DC / 12v AC).[/quote]Yes, some use the +12V, some use the 12V AC. ... have other circuitry which needs +12V.

    [quote=" ... need the -5V or the 12V AC supplies.

    The ... cathode) between the incoming +12V and the edge-connector contact ...
    1024MAK 1024MAK October 2019 Hardware
  • Toastrack - faint monochrome displayHi all, I've got a Toastrack with a video issue on both RGB and RF. I get a faint monochrome screen: on one LCD display it is predominately white,…

    ... />
    I've got a Toastrack with a video issue on ... 'm getting about 2V, not 12V, so this is the likely ...
    JollyBoyJohn JollyBoyJohn February 2017 Hardware
  • zx spectrum +2A power supply missing -12v voltshey.. i'm looing at a zx spectrum +2A power supply that the -12v rail seems to be missing .. it has the 12 volts and 5 volts .. it is the version wit…

    ... power supply that the -12v rail seems to be missing ... , i have changed the -12v regulator (79L12) no change ... supply converts from 240v AC to 19v dc ish ... to the 5 volt and -12v rail ,,, confused.com
    i realize that the -12v is not strictly required for ...
    mark8bit mark8bit November 2020 Hardware
  • SDP: Floppy adaptors available to contributers !!!Hi folks, I've got a few more of those plus 3 adaptors that will allow you to read and write your 3" disks. The aim is to get you all motivated int…

    ... [url="http://newton.sunderland.ac.uk/~specfreak/FD1/GPsAdaptor/"] ... http://newton.sunderland.ac.uk/~specfreak/FD1/GPsAdaptor ... cable because 5v and 12v are reversed on the ... [url="http://newton.sunderland.ac.uk/~specfreak/"]http://newton.sunderland ...
    Andrew Barker Andrew Barker March 2004 MIA/STP/SDP
  • need help with power supply: AC-DC adaptorHi guys, I need some help with explanation.. My original ZX powersupply is out of order so I?m going to use ac-dc adaptor instead. In the manual for …

    ... I?m going to use ac-dc adaptor instead.
    In ...
    de Vandemar Croup de Vandemar Croup July 2005 Sinclair Miscellaneous
  • 3" floppy in pcI'm in need of some assistance. I have attached a 3" floppy to my pc using a cable as described at [url="http://newton.sunderland.ac.uk/~specfreak/F…

    ... at [url="http://newton.sunderland.ac.uk/~specfreak/FD1/"]http://newton ... .sunderland.ac.uk/~specfreak/FD1/[/url]
    12v wires switched), I have also ...
    jagman5994 jagman5994 September 2005 Sinclair Miscellaneous
  • ToastrackYay! I now have a toastrack 128K. It even works (the TV modulator's a bit dodgy though). I've wanted one since like 1986.

    Yay! I now have a toastrack 128K. It even works (the TV modulator's a bit dodgy though). I've wanted one since like 1986.
    Winston Winston March 2007 Hardware
  • External power supply for SpectrumsWrong title. What I meant was 'Battery pack to use Speccy on the go'. I visited batterygeek.net, explained what I wanted to do with my spectrum, and…

    ... AC adapter to charge the battery
    130Wh Capacity
    9V~12V ... output
    9V/12V selector switch
    Tolerance ... popular connector tips for the AC adapter.
    Custom connector tips ...
    zxbruno zxbruno April 2007 Hardware
  • how to set voltage regulator to the correct setting ?On the power supply that is broken it says AC adapter INPUT : 230v 50Hz OUTPUT ; 9v 200mA Regulated On the variable voltage adapter i have the…

    ... broken it says

    AC adapter
    INPUT : 230v 50Hz ... .5v, 6v, 7.5v, 9v, 12v.
    There is a socket ...
    swordheart swordheart September 2007 Chit chat
  • Which ROM for 128 ToastrackHi I have a Spectrum 128 Toastrack which has a missing ROM chip. I have an Eprom blower and a few 27256-25 Chips. I have looked on the Spectrum ROM …

    Hi

    I have a Spectrum 128 Toastrack which has a missing ROM chip. I have an Eprom blower and a few 27256-25 Chips. I have looked on the Spectrum ROM website but cannot decide which is the right one.
    Martin Baugh Martin Baugh December 2007 Hardware
  • +12v/-12v/9v and peripherals?Do any peripherals use the +12v, -12v or 9v lines exposed at the edge connector? Firstly, if they use +9v they won't work on a +3, since the +3 does…

    Do any peripherals use the +12v, -12v or 9v lines exposed at ... traces down to pass the +12v/-12v through, so I'm looking ...
    Winston Winston March 2008 Hardware
<1234567…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
toastrack 1.5K 1.9K
12v 1.9K 3.2K
ac 1.7K 2.6K

Related Threads

  • +12v/-12v/9v and peripherals?Do any peripherals use the +12v, -12v or 9v lines exposed at the edge connector?<br /> <br /> Firstly, if they use +9v they won't work on a +3, since…
  • Toastrack.... with no toastrack?![url="http://www.ebay.co.uk/itm/272028658596?_trksid=p2055119.m1438.l2649&amp;ssPageName=STRK%3AMEBIDX%3AIT"]ebay.co.uk/itm/272028658596?_trksid=p205…
  • need help with power supply: AC-DC adaptorHi guys, I need some help with explanation..<br /> My original ZX powersupply is out of order so I?m going to use ac-dc adaptor instead.<br /> In the…
  • ToastrackYay! I now have a toastrack 128K. It even works (the TV modulator's a bit dodgy though). I've wanted one since like 1986.
  • Testing the Ram on a Toastrack 128KHi All<br /> <br /> My "new" 128K is misbehaving, all the demos I have loaded for it crash instantly, Ghostbusters 128K is playable but one of the ba…
  • Which ROM for 128 ToastrackHi<br /> <br /> I have a Spectrum 128 Toastrack which has a missing ROM chip. I have an Eprom blower and a few 27256-25 Chips. I have looked on the S…
  • 2x Rubber Key Spec, 48K Plus and Toastrack 128K for saleI've got a few Speccies on EBAY at the moment - <br /> <br /> 2x rubber key 48K (working but need membranes)<br /> 1x Speccy+ (working, ne…
  • Spectrum+ 128 (toastrack) - tuning issueI remember a post from a while ago where [COLOR=Blue]Winston [/COLOR]said his [COLOR=Red]toastrack[/COLOR] had horrendous [COLOR=SeaGreen]drift [/COL…
  • speccy 128 toastrack joysticksDoes the RS232 port (or the keypad port) work as a joystick port on the toast rack, and if so what 'system' is it...interface 2 or kempston?<br /> <b…
  • Currah speech on 128k toastrackWill these two work happily together? <br /> If not will it work on my composite video modded 48+(comp out of RF socket) as it seems to need to be p…

Related Searches

  • harlequin toastrack
  • divmmc enjoy toastrack
  • datacorder 12v
  • toastrack
  • toastrack 12v tr
  • toastrack 12v tr4
  • missing 12v
  • 12v
  • toastrack luminance
  • toastrack composite
  • toastrack scart
  • low resistance 12v
  • differences in toastrack basic save m
  • differences in toastrack basic m
  • toastrack basic m
  • 12v coil
  • toastrack volume fix
  • toastrack pictures
  • toastrack 12v
  • 12v ac

Copyright © 2024 World of Spectrum