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Modern PSUHello everyone, I'm looking for a modern PSU for my Spectrums and my dual set of 3.5'' floppy drive+HxC floppy emulator. The one for Spectrum should …
... , these all have internal voltage regulator circuitry. They are designed ... regulated supply with an output voltage of 8V to 11V. ... heat that the internal 5V regulator has to dissipate, go ... and comes as standard. Over-voltage (also called crowbar protection) ... -
Short Circuit Damage?Hey Spectrum fans, Currently trying to diagnose what is wrong with my 48K Issue 4B ZX Spectrum. The initial problem was the fact it would not boot -…
... I managed to get some voltage readings from it.
Voltage Regulator showed a stable output of ... -
Weird symptom number 2...I got a new keyboard membrane for my Spectrum+ plugged it in and low and behold the weird left to right printing of the copyright message disappeared…
... /p/ts7805cz-1a-positive-fixed-voltage-regulator-to220-case-ql31[/url]
Weird symptom number 2...I got a new keyboard membrane for my Spectrum+ plugged it in and low and behold the weird left to right printing of the copyright message disappeared…
... tab of the 7805 regulator is electrically connected to ... /ts7805cz-1a-positive-fixed-voltage-regulator-to220-case-ql31[/URL ... /ts7805cz-1a-positive-fixed-voltage-regulator-to220-case-ql31j"]http ... /ts7805cz-1a-positive-fixed-voltage-regulator-to220-case-ql31j[/URL ...Sinclair ZX Spectrum 128My loving mum has brought me back one of these beauties from a carboot sale but I'm haven a slight problem with it I CAN'T FIND THE ON SWITCH!!!!!…
... (or should be) a 78S05 voltage regulator. The wiring looks ok (red ... is to convert the unregulated voltage (somewhere between 10-12v) from ...Sinclair ZX Spectrum 128My loving mum has brought me back one of these beauties from a carboot sale but I'm haven a slight problem with it I CAN'T FIND THE ON SWITCH!!!!!…
... (or should be) a 78S05 voltage regulator. The wiring looks ok (red ... ]
That's the voltage I'm getting, around 11v ... and I just soldered the regulator to them. That's why ...Spectrum preservation/clean up questions.I’m sorting out my 5 Spectrums trying to make them look a bit better, and to package them up how they should be, and to get them to be reliable…
... that the Z80, Rom, and voltage regulator heatsink are at mild temperature ...Smokin... more 48k woesHi, it looks like I've converted another Spectrum 48K+ into a smoke machine. I'd been rebuilding an Opus Discovery unit and everything looked good. …
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With regard to the voltage readings that you have taken ... /metal tab of the 7805 voltage regulator for your meters negative (black ...Smokin... more 48k woesHi, it looks like I've converted another Spectrum 48K+ into a smoke machine. I'd been rebuilding an Opus Discovery unit and everything looked good. …
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With regard to the voltage readings that you have taken ... /metal tab of the 7805 voltage regulator for your meters negative (black ... />
If I measure the voltage across the ICs I get ...Switched voltage regulatorIn the past a replacement voor the (hot!) 7805 has popped up a couple of times in various threads. As far as I know, Recom Power Inc. was always ment…
... the 7805 by a switched voltage regulator can cause problems at issue ... the fact that the operating voltage of the PSU runs very ... . This will reduce the operating voltage by 0.7V to 12 ...New Raspberry PiThere's a new raspberry Pi coming out, faster quad core processor and 1Gb ram ! [url]http://www.bbc.co.uk/news/technology-31088908[/url]
... : apparently the RPi 2's voltage regulator is sensitive to light, enough ... effect inside a bare-die voltage regulator IC (U16). Reportedly fixed be ...No display on a 128 toastrackHi All, I just bought a 128k off ebay with the usual, "it worked last time I used it", so I read into this "it does not work". True enough, it does n…
... normally destroy the 7805 5V voltage regulator and destroy the two transistors ...Running a ZX Spectrum Stateside.Ok, so I have some spare time and want to hook my Spectrums up to my Big 60" TV for some fun. My Sony AV unit should be able to translate the signal …
... units. Also, since the mains voltage is rectified to DC, 60Hz ... 9v regardless of load, the voltage regulator inside the machine doesn't ...Just Speccy 128Wow, got home and found that I have received a parcel from Zaxon containing a Just Speccy 128 PCB :-) B-)<br>Now all I need is a parts list, th…
... don't need a high voltage rating, as it's all ... are fine (or a higher voltage as long as it fits ... the data sheet for the voltage regulator chip, LM2596S-5.0 (5V ...Have I damaged the keyboard membrane?I've just picked up a Spectrum+, and am a total novice when it comes to fixing hardware, but thought I'd give the Speccy a clean and see if I could r…
... like the ULA and the voltage regulator heatsink. They either sit on ...Replacing foam pads on top of heatsink in Spectrum+Inside a Spectrum+ that I'm working on, the 2 foam pads on top of the heatsink (see photo for where they were) had become a disintegrated mushy pile …
... ! Instead, I fitted a new voltage regulator, as detailed [url="http://blog ... .uk/2014/11/zx-spectrum-voltage-regulator.html"]here[/url]. I have ... ://dl.dropboxusercontent.com/u/15218813/Voltage.jpg[/img]Replacing foam pads on top of heatsink in Spectrum+Inside a Spectrum+ that I'm working on, the 2 foam pads on top of the heatsink (see photo for where they were) had become a disintegrated mushy pile …
... the one I did the voltage regulator with was too big really ...Replacing foam pads on top of heatsink in Spectrum+Inside a Spectrum+ that I'm working on, the 2 foam pads on top of the heatsink (see photo for where they were) had become a disintegrated mushy pile …
... that when I swapped the voltage regulator, as I'm not sure ...3D Printed Toastrack 'heatsink'Hi folks, I've developed a 3D printed reproduction of the Sinclair 128 Toastrack heatsink, which is suitable for replacing a damaged 128 heatsink,…
... of dissipating heat from the voltage regulator (which is what the original ...ZX Spectrum+ adviceHey all, I just got a ZX Spectrum+ from eBay and I'm not sure yet what to do with it. I wanted to first take a peek inside, see what issue board it i…
... is as described except the voltage regulator resistance (only 58KOhms). Don't ...Grey +2 - DOA and no power lightTook a punt on a grey +2 at the weekend to be a spare. It was "untested" although so were all my other +2's which are all fine. Tried to power th…
... power connector on. Now the voltage regulator was getting power but the ... machine didn't work. Voltage reg wasn't getting hot ... Z80 was.
Replaced voltage reg, that now gets hot ... the line beyond the power regulator. But what though?Grey +2 - DOA and no power lightTook a punt on a grey +2 at the weekend to be a spare. It was "untested" although so were all my other +2's which are all fine. Tried to power th…
... the 78S05 voltage regulator. Sometimes a 78xxx type voltage regulator will fail ... of the 78xxx type voltage regulator goes open circuit (broken ... correctly control the output voltage, which will rise to ... just lower than the input voltage :-(
Either of ...Whites are yellow - 48k Issue 2I have a 48k issue 2 that appears to be working fine. I've replaced all but 2 of the electrolytic caps (mostly because the 2 were not in stock at my…
... .uk/2014/11/zx-spectrum-voltage-regulator.html
The heat sink ...DiscipleI have got a Disciple Disk Interface, with no manual, software. I have downloaded the PDF Manual from WOS, which says I have to load the operating…
... overheating, looking inside, the 7805 voltage regulator is getting very hot, which ...DiscipleI have got a Disciple Disk Interface, with no manual, software. I have downloaded the PDF Manual from WOS, which says I have to load the operating…
... overheating, looking inside, the 7805 voltage regulator is getting very hot, which ... fitting a better power
regulator. I will fit a Traco ...
for the 7805 power regulator. Advantage is that there is ...Dead SpectrumHello guys, I've just bought a dead Speccy 48k (Rubber Keyboard Issue 3 board). Basically, when powered on it initially appears to boot up ok, but in…
... capacitors and finally swapped the voltage regulator out with a Traco Power ...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 …
... many "series type" voltage regulator chips which are available.< ... set the wanted output voltage from the voltage regulator.
The ... the output from the voltage regulator (VOUT). Notice that ... the input supply to the voltage regulator (VIN).
...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 …
... middle pin of the LM317 voltage regulator. You should get a resistance ...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 …
... metal tab of the LM317 voltage regulator to the case/heatsink should ... middle pin of the LM317 voltage regulator we are looking to get ...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 …
... effectively you are shorting the voltage regulator output to ground.
