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Opus Discovery "the big switch on" (after 20 years)I have a few of these Opus Discovery's with different Eproms in that have not been swiched for 15-20 years or so . I am in no rush to switch any on …
Revisiting the SY-002-5-12 power supply[URL=http://s827.photobucket.com/user/harriusherbartio/media/both%20supplies%20006_zpsusgob5hm.jpg.html][IMG]http://i827.photobucket.com/albums/zz200/harriusherbartio/both%20supplies%20006_zpsusgob5hm.jpg[/IMG][/URL] -
Spectrum +2 (grey): Mod- and operation- related advices needed.Dear Sirs and Ladies, Please welcome a newbie to the “World of Spectrum” (both to the forum and, well, metaphorically). I’ve recently purchased a…
There are no diodes because it doesn't need them. The signal comes out of single rail op-amps running off the 5 volt supply so it can't go negative. -
I can't get my +2B to work over RGB to SCART.Hi so I have a black +2B and no matter what I do I get a black screen using the RGB-SCART scart cable (specific for the model ) and I'm using a SCART…
... a second resistor from the 12 volt rail to the non-disconnected ... -
What mods do you recommend for a +2aHello all, I have recently got a +2a, that is running nicely. I'm thinking of modding it. I have read that the +3e rom is a good option. what else…
... out that putting an unprotected 12 volt output on the RGB socket ... -
+3 PSU vs +2 PSUI'm referring here to the black +2's :) Now, a closer look shows the differences between the power supplies for these really is: "The 5V line is …
Yes, besides the floppy drive all the circuitry using the 12 volt rail is the same. -
+3 PSU vs +2 PSUI'm referring here to the black +2's :) Now, a closer look shows the differences between the power supplies for these really is: "The 5V line is …
[quote="guesser;949876"]Yes, besides the floppy drive all the circuitry using the 12 volt rail is the same.[/quote]
Thank you! :) I suspected as much per my post but wanted to be sure. -
+2a PSU adviceHi all, With my +2 being a bit of a diva I am thinking about getting my +2a recapped so I can use it for the odd game the +2 does not like, there …
... component that requires the negative 12-volt rail is the MC1488 line ... -
Gaaaahhhghh! Christmas (Lights)Tis the season to be a grumpy old git. Its now December and as is customary in the USA, after thanks giving the decorations 'must' come out. I've …
... them from a random unregulated 12 volt transformer with a single resistor ... -
+3 OdditiesHello All! My +3 has a 3 oddities and I was wondering if any had any advice (pretty please!): 1) The FDD light is partially lit, when the drive…
The +3 STEREO (not mono) jack is split .. the tip and the ring do different jobs one is the audio output one is the audio input .. think the light gets brighter during operation because the 12 volt is being energised -
PC Power supply for SpeccyHi all, after 13 years with out playing spectrum games I am eager to play the old games. Thus I got up to the garret checking my old stuff. Two of m…
... to use a PC power supply to get rid of the ... often falty Speccy power supply. Thus I would like to ... mentiones before the -5V and +12 to the ram. The queastion ... -
Spectrum +2 power supply - voltages on each pin..?My +2 suddenly stopped working yesterday. It was working fine earlier in the day and now the power light will not go on, nor will the tape drive and …
... all. Having run a volt meter across a few parts ... suspect that the power supply is damaged in some ... on the actual power supply itself not the Spectrum side ... giving 12v as the supply indicates according to the ... 5v points as the supply seems to indicate there ... -
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…
... use a regular PC power supply for the Sinclair and discard ... the power supply parts. Has anyone done it ... -
power supply questionHi all, got my +2 ( Grey) back home to Canada. monitor should display ok, and I have a power supply I think will work. specs are : Input 120 V…
... , and I have a power supply I think will work.
volt.
Amperage might also be ... help on if this power supply will work would help BEFORE ... /> I did bring the 240 Volt power supply with me, so I ... -
Building a ZX Spectrum and I have some voltage questionsI've posted about this before looking for parts, but now I've found all the hard-to-get stuff (thank you Retrolium!). So I figured new questions, new…
... is an original European Sinclair supply that came with my Spectrum ... to be putting out about 12 to 12.5v (a bit high ...
+12V to Lower RAM: +12.56V
-5V to Lower ... be concerned that the 5-volt lines (both positive and negative ... -
Help! +3 won't work anymore!I've just set up my old +3 and it just won't work - it used to a few months ago but now it won't :( I'm in need of some expert help so here's the pr…
... supply. If the Drive and Power LEDs are lit the +5 volt ... +12 volts.
The best way to check the supply ... multimeter and check the power supply lead (carefully). See FAQ ... the problem lays with the supply, get a replacement from ... on 2005-08-15 12:02 ] -
Spectrum +3 Powered off a PC???Hiya Quick question. Is it possible to power a +3 from a PC power supply? as in, make or buy an adaptor? or some other method. Want to mount a +3 …
... to find an old AT supply, although you can use an ... Caps, to filter the +12 and +5 volt lines.
[url ... /> If your using an ATX supply then pin 14 Soft Power ... live inside the supply. So always unplug the supply before doing any ... -
+2 power supply on standard SpecciesHi! I have a few 48K speccies, and I run them using a shitty chinese multi-voltage power supply. I've heard some horror stories of that power suppli…
... An ideal voltage source will supply the same fixed voltage, ... amps will flow, but 12 volts will still be present ... circuit, you'll have 12 volts but 0 current. ... circuit, you'll have 12 volts but infinite current ... resistor across it, 1 volt will be supplied over ... -
+2 grey PSU capacitor changeHi I opened up a +2 grey power supply (2.1A max output) unit in order to replace the aged electrolytic capacitor inside, just like I always do with …
... looks like a 12 ohm resistor to the power supply. So, now ... capacitor:
Vripple = (9 / (12 * 0.0047)) * 0.01
volt better.
This equation ... -
Issue 3 board... How to resurrect?Dear Everyone, Now I have a working 48k Issue 3, a sort of working Speccy+ (still having problems with the keyboard, more of that in another post) a…
... , the 5V, -5V and 12 V supplies. A missing -5V ... on the board shorting the supply out, it does not ... always imply that the power supply is faulty. It is ... a ripple waveform on the supply lines without an oscilloscope ... your multi-meter to AC volt and you should get ... -
Fixing my old ZX Spectrum 48K issue 4AHi Guys, I trying to fix my old Spectrum 48K. Looks like my dad used a wrong power supply as the ULA had a bit missing and so did the 7805. So I rep…
... left PIN 1 of IC 12 shows only 0.665 V ... this should be 12 V.
Also the Pin ... .3 Volts.
0 Volt on PIN 14 and 5V ... some reason my switching power supply is not working :confused:
Volt not 12 V. -
Fixing my old ZX Spectrum 48K issue 4AHi Guys, I trying to fix my old Spectrum 48K. Looks like my dad used a wrong power supply as the ULA had a bit missing and so did the 7805. So I rep…
... /> using the "new" 9.45Volt supply the current to my zx ... .01V and 12V is 12.33V , the 5 Volt rail is 5 ... -
SPECCY+2 110V POWER SUPPLYI live in the USA and I bought a ZX Spectrum 128k +2 in eBay.com. The problem is that i don't know how to turn it on. All the major US appliances use…
... ac to 9v dc power supply would be enough. I don ... -
THE SPECTRUM QUIZ IS HEREOkay folks, here are 30 questions. The person who EMAILS them to me with the most correct is the winner. No cheating, use your memory and not the W…
... on Hangworld to replenish your supply. This is easier said than ... dragon fighting Jester
12 What is the FULL name ... -
+2 Power SupplyFinally go meself a +2 off ebay for a 10er!!! But I could do with an official +2 Power Supply. Anybody know where I can get one? Cheers
Finally go meself a +2 off ebay for a 10er!!! But I could do with an official +2 Power Supply.
Anybody know where I can get one?
Cheers -
Power supplyDoes anyone have a power supply for a 48k they are willing to part with, or swap for a Pro 5000 joystick?
Does anyone have a power supply for a 48k they are willing to part with, or swap for a Pro 5000 joystick? -
+3 Power Supplyg'day everybody. sorry to be asking for help in my first post (i know it's a tad rude), but how "generic" is the +3 power supply? does it supply mult…
... " is the +3 power supply? does it supply multiple voltages like the ... 't come with a power supply. i'm good with electronics ... -
AY-3-8910/12 CPLD/FPGA SourceI'm looking for it for my clone project. If anyone have it or links where to find it, plz let me know ;) [ This Message was edited by: pern on 2004…
I'm looking for it for my clone project. If anyone have it or links where to find it, plz let me know ;)
[ This Message was edited by: pern on 2004-08-17 14:12 ] -
Sinclair FTV1 - help!I want to try out a Sinclair FTV1 I've just bought. Can anyone tell me the polarity that I need to use when using a mains adaptor? (I understand tha…
... 's 6 volt)
Also - is a 500mA (regulated) supply hefty ... -
Smooth Screen Scrolling RoutineHi everyone, this is a follow up to the thread on smooth screen scrolling. As promised here is the code for the routine. It's pretty long and fairl…
... (scroll window) is 24 x 12, though it pretty easy to ... this on EmuZWin, and can supply a copy of the source ... background data table
SUB 12
LD L,A
