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Amperage drastic reduction in a rubber 48KWell, I am now with the approach of a drastic reduction ZXSpectrum amperage. As a first step would change the Z80 processor for other (Z80C). Unfortu…
... you are trying to reduce power then get rid of all ... replace it with modern low power chips.
Remove all the ... power supply circuitry and fit a ... instead of the wasteful linear regulator. You can run everything on ... -
Amperage drastic reduction in a rubber 48KWell, I am now with the approach of a drastic reduction ZXSpectrum amperage. As a first step would change the Z80 processor for other (Z80C). Unfortu…
... you are trying to reduce power then get rid of all ... replace it with modern low power chips.
Remove all the ... power supply circuitry and fit a ... instead of the wasteful linear regulator. You can run everything on ... -
Amperage drastic reduction in a rubber 48KWell, I am now with the approach of a drastic reduction ZXSpectrum amperage. As a first step would change the Z80 processor for other (Z80C). Unfortu…
... are trying to reduce power then get rid of ... replace it with modern low power chips.
Remove ... all the power supply circuitry and fit ... of the wasteful linear regulator. You can run everything ... 5v->12v chip to power that.
(Without ... -
ZX Spectrum 48k issue 3b power problem?Hi :) I was lucky enough to find a couple of ZX Spectrums at a car boot sale yesterday. I spent the evening fiddling about with one (issue 2) and t…
... The 7805 regulator is the crux of most power issues of ... chain is the 7805 5v regulator.
reading ... .co.uk/L78S05CV-78S05-REGULATOR-5V-/200592925908?pt=UK_BOI_Electrical_Components_Supplies_ET& ... /10-X-L7805-Voltage-Regulator-L7805CV-5V-7805-FastPost ... -
now lost the +5v from my +3 psuthe voltages i get from it are -12v +12v +0.61v what part needs replacing in the housebrick that is the PSU? having a bad weekend :-(
... noted there's a 12v regulator on the left hand side ... . That transistor is a higher power rating than the original 1061 ... -
New speccy modelThe 48k toastrack ;) [img]http://alistairtesting.no-ip.org/48k-toastrack.jpg[/img]
... a 78S09 2 amp 9v regulator, which is pumped +12v
power rails - from that you have ... -
RGB to S-Video and Composite Adapterif I produced a dongle that generated composite and s-video from the RGB socket on +3 and Black +2 spectrums would anyone be interested? I'm thinkin…
... +2 don't provide a power pin on their RGB port ... plug into the speccy's power socket.
(on both ... to have its own 5v regulator anyway as the +3 gives ... -
New speccy modelThe 48k toastrack ;) [img]http://alistairtesting.no-ip.org/48k-toastrack.jpg[/img]
... back into the regulator, every time the input power is switched off ... -
48k dots appear but not with CUB monitorToday I tried out an issue 3 and an Issue 2 with the CUB monitor, to my surprise they both worked flawlessly, now before when I tried them on any oth…
... all near the power socket and down to the regulator, exactly the ... -
48k dots appear but not with CUB monitorToday I tried out an issue 3 and an Issue 2 with the CUB monitor, to my surprise they both worked flawlessly, now before when I tried them on any oth…
The Opus power supply, regarding powering the Spectrum, ... voltage also feeds the LM317 regulator (REG1) that 'makes' 12V for ... is not only providing the power, but also adds a certain ... -
Dead 128 ToastrackHi! I bought 128 toastrack motherboard and seller said it's working. Maybe it was when he sent it but motherboard was only put into envelope. So it …
... /> I would start at the power in and then start exchanging ... .
1. 7805 regulator
2. swap the CPU ... this is expecting a working power-supply (9VDC 1.8-2 ... -
Dead 128 ToastrackHi! I bought 128 toastrack motherboard and seller said it's working. Maybe it was when he sent it but motherboard was only put into envelope. So it …
Yes I have working power supply because I have working 128.
As I said I'm not an expert so is the regulator same in 48K and 128K? I have spare regulators for 48K (printed 7805) and in 128's regulator has print 7805CSP.
Ippe -
ZX Spectrum + alive thanks to this site.I was given a dead unit several months ago. I finally had time to look at it yesterday. Using the repair guide on this site the thing is now alive.…
... - the 7805 regulator is about 55% effcient in converting the power - this ... heat and providing nice smooth power rails =) .
Alternatively you ... -
Challenge Sprint 4x tape recorderHi, I noticed a [url="http://www.worldofspectrum.org/infoseekid.cgi?id=1000051"]Challenge Sprint[/url] on eBay, and checked out the WoS entry for it…
... unit has no power plug. It takes power supply from the rear ... moment) need that, and no regulator has been found. It hasn ... -
Spectrum 8bit IDE adaptersHello there my fellow WoS'ers Today I am pleased to (finally) release these little adapters into the wilde [URL="http://postimage.org/image/1aceto6…
... and will provided better/efficent power to your spectrum (improving ... of the machine and its power pack).[/INDENT]
... )[/INDENT][/indent]
[B]Power Source[/B]
[INDENT][B ... the +5 from the 7805 regulator[/INDENT][/INDENT]
... -
Spectrum + and +3 Bath! Including SEXY photos!Continuing my "bath" projects: Today I repaired a 48K Spectrum + to working condition, an Issue 4 that is nice and stable. Took 4x Spectrums+ apart …
Slightly OT but [I]that's[/I] what the huge toast rack is needed for? A single regulator/power transistor??? -
Spectrum + and +3 Bath! Including SEXY photos!Continuing my "bath" projects: Today I repaired a 48K Spectrum + to working condition, an Issue 4 that is nice and stable. Took 4x Spectrums+ apart …
... is needed for? A single regulator/power transistor???[/QUOTE]
yep ... 9v down to 5v the regulator needs to get rid of ... -
BETA-DISC (TR-DOS) support in ZX emulatorsBETADISC 128 is original device designed for external use with ZX Spectrum 128/+2(grey). Russians ZX clones (Pentagon, Scorpion, ZX profi, Quorum, ZX…
... usually needs +9V and +12V power lines. All Didaktik's have ... interfaces have own 7805 voltage regulator and some versions needs +12V ... -
Greetings all overheat problemsfirstly hello everybody and thanks for adding me to the forum dont know if ill be much use here but i hope so the problem i have or should i say a…
... sneaky suspicion that its the regulator.
As such I ... would suggest replacing this regulator with a [URL="http://www ... heat was localized on the regulator - very little was being dissipated ... , or a sudden spike of power that the heat-sink couldn ... -
RECOM pin compatible DC-DC 7805 regulator replacementsFinally got myself sorted out now. If you want to purchase chips send me an email to [email]alistair@alistairsserver.no-ip.org[/email] with your payp…
... =BloodBaz;562665]
Is this regulator okay for 48K Spectrums with ... which I suspect requires more power than the divide. I run ... RECOM chip works with a power supply voltage anywhere between 6 ... the leads bent and the regulator flat with the board as ... -
Dead Spectrum+Hi! Any suggestions where to start finding what's broken: Spectrum+ with issue 6A motherboard and nothing on TV. Top row of the upper memory chips g…
... the output pin of the regulator and measure again on it ... . If after replacing TR4 you power on the computer and suddently ... video mod if possible, and power on the computer connected to ... -
Requesting a little help to identify the purpose of this 'add-on' to my Issue 2Hi everyone First of all it's my first post here so please go easy on me! I'm grateful to be accepted into your fine little club :smile: I probabl…
... , several magnifying glasses of various power, some helping hands, etc, etc ... showing 4.95v. The voltage regulator is showing 11.87v on ... -
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…
... course - the power circuit is in front of the regulator not behind ... -
what is this crazy modfound a speccy in my loft yesterday,and it seems to have an external heatsink modd i havent the foggiest about speccys heres a few pics [url]http://i…
... hook-up
the power seems pretty obvious, I would ... interferance from an overloaded 7805 regulator - so he plumbed it outside ... -
Colour blocks on displayHi all, I have just acquired another Sinclair product, my first one being a C5, it's a 48K ZX Spectrum. It shows colour blocks on the display when p…
... /> [QUOTE=kamilb1998;601859]
7805 regulator=4.95V
[/QUOTE]
power connections so it may take ... one that has shorted its power connections, TR4/TR5 may die ... if that happens or you power on without being sure the ... -
ZX Spectrum 48k issue 3b power problem?Hi :) I was lucky enough to find a couple of ZX Spectrums at a car boot sale yesterday. I spent the evening fiddling about with one (issue 2) and t…
... by a 7805 / 78S05 regulator for 5v, this is ... The 7805 regulator is the crux of most power issues of ... Spectrum after a ailing Power supply. once you have ... chain is the 7805 5v regulator.
reading ... sounds as thought the regulator is dropping out, but ... -
old PC with Monocrome Monitor Out.So as discussed in the Carboot sale thread, I have brought and old Apricot Xi. It takes a monochrome monitor via a 9 pin D connector. Now I don't ha…
... that 12V for a 7805 regulator to power a few 74HCTxx IC ... -
ZX Spectrum 48k issue 3b power problem?Hi :) I was lucky enough to find a couple of ZX Spectrums at a car boot sale yesterday. I spent the evening fiddling about with one (issue 2) and t…
... be failing and causing the power supply to fail after the ... than normal with the faulty regulator and damaged the part of ... -
ZX Spectrum TowerHi all, i am working on a ZX Spectrum 48K build in a PC tower case. Is there anyone who did it before? I have some questions duo the PSU. I have to g…
... dissipate quite a bit of power (especially if there are peripherals ... dropout voltage of the 7805 regulator as load is added.
power supply consisting of a small ...
