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ZX Spectrum and add-on temperaturesImre Jakli from Hungary sent me some interesting pictures which I think are worth to share. These are about temperatures he measured with a modern to…
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The 7805 regulator was replaced by a 2A ... I've left the old regulator in it's place, so ... -
Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
... to 0V / ground, the 7812 regulator chip should current limit and ...Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
... supply (transformer windings and voltage regulator) will likely be a good ...Toastrack poor pictureGot a toaster in that had a blown regulator, after replacing I can "just" about tune it in but its really poor, I can barely make out the menu. Im s…
... in that had a blown regulator, after replacing I can "just ...Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
... power supply (represented here by regulator chip IC1) to the load ...Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
... the impedance of the linear regulator as well. Now it will ... and outputs of the linear regulator but (a) they are electrolytic ...Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
... internal circuitry of the linear regulator that provides the +12V (and ...Homebrew ZX Spectrum kits for DIY builders !Hi. I'm considering selling Homebrew ZX Spectrum kits on ebay... hopefully at a low price ! They'd consist of : Z84C0020PEC Z80 CPU …
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Various switches, connectors, 7805 regulator etc
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My first composite mod.Thought it was about time I gave the composite mod a go. I used a youtube video, the bloke in the video took 10 mins, I took about 2 hours :) but it…
... RAM module replacements, a Recom regulator replacement, and (given the nature ...My first composite mod.Thought it was about time I gave the composite mod a go. I used a youtube video, the bloke in the video took 10 mins, I took about 2 hours :) but it…
... RAM module replacements, a Recom regulator replacement, and (given the nature ...Using a Euro Sinclair PSU in UKI've got a EURO1400 PSU with a Euro plug. Am I right in thinking I can just cut the pug off and change it to a UK plug, and it will work fine? The on…
... dissipated by the 7805 voltage regulator.
It is however possible ...Using a Euro Sinclair PSU in UKI've got a EURO1400 PSU with a Euro plug. Am I right in thinking I can just cut the pug off and change it to a UK plug, and it will work fine? The on…
... when I placed a 12v regulator in the PSU that the ...+2 Grey video issueSo far ive replaced TR4, TR5 (and correctly orientated them) and seperated the audio from the video, still I have this; [youtube]mZZWOXRs_Zk[/youtube…
... D20 (near the 7805 voltage regulator) cathode (lead nearest the front ...Cooler padI have this cooler pad that prevents an old laptop from getting overheated like hell. It is powered by plugging it to the usb port. I don't have a sp…
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Its a voltage regulator. I believe its switched and ...Cooler padI have this cooler pad that prevents an old laptop from getting overheated like hell. It is powered by plugging it to the usb port. I don't have a sp…
... =rune;756764]Its a voltage regulator. I believe its switched and ... more efficient than a linear regulator.+3 Power SuppliesI have about 4 spare +2A power supplies. Can I use these with the +3, or is there any difference?
... I remember, a 1 A regulator is used to generate 12 ... is produced by a small regulator (I think rated for 100 ...+3 Power SuppliesI have about 4 spare +2A power supplies. Can I use these with the +3, or is there any difference?
... use the same 7812 voltage regulator chip.
We don ...PSU Overvoltage?Going through a pile of 48k PSU's today, rewiring and fitting new plugs, testing each one as I go I came across one that outputs 14.85v, usually im g…
... released by the 7805 voltage regulator.
[B][I]Mark ...PSU Overvoltage?Going through a pile of 48k PSU's today, rewiring and fitting new plugs, testing each one as I go I came across one that outputs 14.85v, usually im g…
... when I placed a 12v regulator in the PSU that the ...Grey +2 DiedHi all, Thrashing my +2 playing Mugsy last night and it did this... [URL="https://m.flickr.com/photos/83515822@N05/13012551693/lightbox/"]https://m…
... to check, starting from the regulator? Then TR6? etc?Another "untested" dead spectrum...Hi, I'm looking for some suggestions on a faulty Spectrum I have picked up. I'll need to wait until tomorrow before posting pics, but the screen is …
... in. Also got new voltage regulator which can also go in ...Another "untested" dead spectrum...Hi, I'm looking for some suggestions on a faulty Spectrum I have picked up. I'll need to wait until tomorrow before posting pics, but the screen is …
... say that the 7805 voltage regulator is okay, so does not ...Another "untested" dead spectrum...Hi, I'm looking for some suggestions on a faulty Spectrum I have picked up. I'll need to wait until tomorrow before posting pics, but the screen is …
... Zorn.
Voltages at Regulator and all lower RAM chips ...Another "untested" dead spectrum...Hi, I'm looking for some suggestions on a faulty Spectrum I have picked up. I'll need to wait until tomorrow before posting pics, but the screen is …
[QUOTE=rune;759961]Voltages at Regulator and all lower RAM chips ...Heatsink's for ZX SpectrumAre heatsinks usefull for the chips are used in ZX Spectrum's On eBay I saw some heatsinks for ULA's, 3 for +/- 8 dollar's. And I want to know are th…
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The 7805 voltage regulator "chip" already has a heatsink ...12v in a Spectrum +2My Speccy 128 +2 requires a 9v 2.1a PSU, all my 9v PSU's are much below 2.1 amps :( I do however have a 12v 2amp PSU, if I reverse the polarity so t…
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As the 7805 voltage regulator will have to work harder ...12v in a Spectrum +2My Speccy 128 +2 requires a 9v 2.1a PSU, all my 9v PSU's are much below 2.1 amps :( I do however have a 12v 2amp PSU, if I reverse the polarity so t…
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As the 7805 voltage regulator will have to work harder ...The Spectrum Resuscitation ThreadKicking off this thread as a place where people who are fixing/restoring Spectrums (or indeed any other piece of related hardware) can show off their…
... my attention to the 7805 regulator. It had experienced a violent ... and bought a new 7805 regulator plus 8 16-pin DIL ...Harlequin clone...PCB manufactured!Using Chris Smith's detailed schematics and project notes from the Harlequin... a Speccy fan in the United States by the name of Don (Superfo) has de…
... out 11v).
The regulator (7805 on the Speccy, LM2596 ... this to 5v regulated. The regulator will need to dissipate more ...
