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+3 - beeper sounds but no AY musicHi guys I am repairing a plus 3 revision 2 board that had no sound at all. Using schematics from https://zxnet.co.uk/spectrum/schematics/ I manage…
... so supplies the circuit with power. As capacitors are not ... amplifier circuits in the voltage regulator then amplify the noise, ... Every time this happens the power supply system has to supply ... br />
Further, the power network will transmit any electrical ... -
+3 - beeper sounds but no AY musicHi guys I am repairing a plus 3 revision 2 board that had no sound at all. Using schematics from https://zxnet.co.uk/spectrum/schematics/ I manage…
... so supplies the circuit with power. As capacitors are not ... amplifier circuits in the voltage regulator then amplify the noise, ... Every time this happens the power supply system has to supply ... br />
Further, the power network will transmit any electrical ... -
Climate ChangeThis has been on the News for a couple of days now, including coverage of worldwide rallies calling for more efforts to tackle climate change. I have…
... voltage regulator with a DC/DC converter like a Recom, Traco Power ... much? It can reduce the power by as much as 50 ... or interfaces fitted, your actual power consumption figures may vary...[/size ... -
What % of WOSSERS use "old school" tape loading when playing their Speccy games.My guess is .000000001% ( but I might be slightly out on this! ) Do people still enjoy doing it "the old way"?
... additional power supply circuits. One of these is a series regulator made ... a 7805 three terminal voltage regulator chip. This takes the nominal ... heat that the 7805 voltage regulator in the ZX Spectrum ... replace the existing 7805 voltage regulator with a mini DC/ ... -
Finding a good (UK) external switch mode power supply for the basic 48k and 128k ZX SpectrumsThis idea has probably "done the rounds" by now . I think I have heard about it a bit late . This thread with look at replacing the original "heavy l…
... do the official Raspberry Pi power supplies
It appears ... - so is it a switching regulator type? -
What % of WOSSERS use "old school" tape loading when playing their Speccy games.My guess is .000000001% ( but I might be slightly out on this! ) Do people still enjoy doing it "the old way"?
... one 7812 three terminal voltage regulator chip (for the +12V ... . It uses a uA723 regulator chip (in a 14 ... with a 2.1mm power connector with the correct ... use an external switch related power brick with a Spectrum ... a dodgy old style power supply?At the moment ... -
Finding a good (UK) external switch mode power supply for the basic 48k and 128k ZX SpectrumsThis idea has probably "done the rounds" by now . I think I have heard about it a bit late . This thread with look at replacing the original "heavy l…
... much care for switch mode power supplies. I understand they are ... cheap rubbish SMPSU (switch mode power supply units) don’t include ... capacitors and a new voltage regulator (7805 or DC/DC converter ... less current (and therefore less power) from the original ZX PSU ... -
Finding a good (UK) external switch mode power supply for the basic 48k and 128k ZX SpectrumsThis idea has probably "done the rounds" by now . I think I have heard about it a bit late . This thread with look at replacing the original "heavy l…
... 7805 replacement DC/DC converter regulator talked about earlier in this ... any electrolytic capacitors in their power supply sections.
Also ... runs warm or hot (diode, power transistor, power resistor, heatsink) then it ... -
Finding a good (UK) external switch mode power supply for the basic 48k and 128k ZX SpectrumsThis idea has probably "done the rounds" by now . I think I have heard about it a bit late . This thread with look at replacing the original "heavy l…
... might have chewed into the power cables and the damage to ... all seeing as the original power supplies are so good and ... Ok
2) Old power supplies are very heavy and ... Asst-Moore ) :- the internal voltage regulator won't have to dissipate ... -
Not bored with the Boards.Going through some old tapes stored rather badly I came across an unlikely item that that I must have stored away quickly with other low grade items …
... />
1) The power supply plug near the Regulator seems to have ... the areas around the ZX81 power supply . Maybe , at some stage ... up internally somehow using a power supply inside the case ? But ... the power supply was not included so ... -
Not bored with the Boards.Going through some old tapes stored rather badly I came across an unlikely item that that I must have stored away quickly with other low grade items …
... say that firstly the ZX81 power socket needs replacing and one ... /details/sinclair-zx81-main-board-power-socket-37026
regulator that appears to have had ... -
can anybody match my high tech testing bay ... [url="https://photos.app.goo.gl/PSsCJRDDCDVJV9158"]https://photos.app.goo.gl/PSsCJRDDCDVJV9158[/url]
ha ha .. my power source on that pic was ... supply with a cheap Chinese regulator / stepper in place of the ... 5v regulator . damn cheap Chinese stuff always ... interference ... i brought some +2 power supplies from them and when ... -
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…
... have a broken wire in power the cable?[/quote]
regulator input ,, this is driven by ... shows -12volts but on the regulator side nothing .. the resistor shows ... -
New video about S-video modification on Issue two 48K Spectrum.I just finished an s-video modification on an Issue two 48K Spectrum so I made a video about it. Most of the technical details are in the video; if y…
... removed the 3,3 volt regulator, it's not quite necessary ... a +5 volt input and power consumption is only marginally higher ... -
Spectrum +2 noobie questionsHi! A few days ago I ordered a Spectrum +2 from ebay thanks to a friend and before it arrives, I wanna be sure I'm ready to use it, so I got a few qu…
... a 9V DC barrel power input and not a ... are the specs of the power adapter exactly? I found ... a DC PSU (power supply unit, brick/power adapter) that has ... you don’t use any power hungry expansions, a 2A ... the heat from the voltage regulator inside the machine, hence ... -
Anybody got a parts list for an Issue 3b please?I've got a schematic, but does anyone have a parts list with the values just for the resistors and capacitors? Just would save me sometime going thro…
... or without heat sink , switching regulator ? , 3B has that dc mod ... get the 12v from external power supply.. although if the aim ... -
Anybody got a parts list for an Issue 3b please?I've got a schematic, but does anyone have a parts list with the values just for the resistors and capacitors? Just would save me sometime going thro…
... quality sockets and a switching regulator definitely. I will be using ... out the magic smoke first power up, it will still be ... -
How many interfaces can be paired up together (as a combo) on the Speccy's back edge connector?Well some would say none as it puts too much of a power strain on the Speccy's power supply . So ignoring this aspect the same question can be asked …
... "Traco" style internal regulator 2) Is the Spectrum power supply of a ... -
Idea about improving EmulatorHi, I got a bright idea today how to improve such excellent emulators a bit more. Okay, disassemblers are available in nearly every one new released …
... PC has enough memory and power to optimize the code for ... -
A picture of me and my Spectrum circa 1984 8o)<a href="http://www.fotango.com/p/eba00132841f00000010.jpg From" target="_blank">[url]http://www.fotango.com/p/eba00132841f00000010.jpg[/url] From<…
... ;w portable above
Zx power pack
WH Smiths datasette ... -
Manic flippin MinerAAARRGGGGHHH!!!!! I give up! Is there anyone who would be kind enough to e-mail me a copy of manic miner AFTER solar power generator. I've wasted eno…
... of manic miner AFTER solar power generator. I've wasted enough ... -
Manic MinerAnyone got any tips for getting past the solar power generator? I keep running out of air, despite trying to stay out of the way of the suns rays or …
Anyone got any tips for getting past the solar power generator? I keep running out of air, despite trying to stay out of the way of the suns rays or whatever it is that flashes around the room. Thanks -
Zenobi Adventures, and others for that matter.Hi Folks, You might have already seem my latest MIS Update which contains a lot of Zenobi titles. Actually it doesn't cos we're not allowed to yet …
... ) Zenobi Software
Staff Of Power Zenobi Software
Star Flaws ... -
PLEASE HELP MEI just got my ZX Spectrum out of its box after being in the loft for a number of years and tried to play a few games but when I turned it on and tune…
... now and again when the power is taken away and then ... -
voltagesAll the Spectrums use a 9V power supply, I think. But would you get away with using a transformer that only gives you 7V?
All the Spectrums use a 9V power supply, I think. But would you get away with using a transformer that only gives you 7V? -
spectrum problemshello, I just recieved a spectrum 48k on ebay [img]/__forums/images/smiles/icon_smile.gif[/img] (I live in the U.S.) I have a transformer to conver…
... my problem:
When i power on the spectrum i get ... -
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 …
... reverted the polarity of the power power supply, so ended up with ... -
[newbie warning :)] Spectrum +3 questionsHello all, Yes, I am a Speccy newbie [img]/__forums/images/smiles/icon_smile.gif[/img] My Spectrum +3 arrived today, and I already have a few questi…
... it out. I found the power plug pinouts at the Spectrum ... -
? M3732-20RS ?I have eight chips of memory from my old zx spectrum 16k. I?d need to know the pins description of them to use it. The text on the chip is: …
... pins description of this chip (power, data I/O, clock signal ... -
Questions about +2The Spectrum +2 has a built in tape recorder. As I am about to put my hands on ony of those, I have a few questions: first, the +2 power supply the s…
... few questions: first, the +2 power supply the same as the ...
