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Barn Find #1Hi, just back from holiday and found a load of spectrum related bits in my folks old barn. They would probably have been a mates who dumped a load of…
... -sink where the 7805 voltage regulator fits. This ensures a better ... -
ZX Spectrum Pre-regulator DesignCarrying on from the "[URL="http://www.worldofspectrum.org/forums/showthread.php?t=44486"]Issue 2 crashes after about 30 mins[/URL]" thread... [QUOT…
... the circuit of the Pre-regulator. For example, to use it ... -
ZX Spectrum Pre-regulator DesignCarrying on from the "[URL="http://www.worldofspectrum.org/forums/showthread.php?t=44486"]Issue 2 crashes after about 30 mins[/URL]" thread... [QUOT…
... the circuit for the Pre-regulator :D
[IMG]http ... -
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…
... scart
- 5V 2A / switching regulator instead of 7805 (cooler design ... -
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…
... scart
- 5V 2A / switching regulator instead of 7805 (cooler design ... -
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…
... scart
- 5V 2A / switching regulator instead of 7805 (cooler design ... -
Transistors 101Hi, Im a complete novice when it comes to electronics and would appreciate any help that can be given. Im replacing the transistor that sits on to…
... get 13V at the voltage regulator but haven't checked anything ... -
Opus Discovery PSU[IMG]http://www.scotek.net/zx spectrum/opus.jpg[/IMG] This is a photo of my Opus Discovery transformer. Can anyone tell me what the connections are …
... where the rectifiers/diodes and regulator reside, then I think you ... -
Transistors 101Hi, Im a complete novice when it comes to electronics and would appreciate any help that can be given. Im replacing the transistor that sits on to…
... input, +5V (from 7805 voltage regulator), +12V and -5V generated by ... -
ZX spectrum 128K + 2 (Grey one :)Hi all, I'm trying to revive a dead ZX 128K +2 (the grey one). The regulator was damaged and seemed to be feeding 7.8Volts onto the pcb. Yikes ! I…
... supply from the 7805 voltage regulator). If TR8 detects that the ... -
48k poor colourHello everyone I need some help please. I have a 48k speccy that I modded a while ago. It loads ok, doesnt crash but the colour is poor e.g dull not …
... board. Iv also pasted the regulator so that's doing some ... -
ZX meets Atmos[URL="http://www.ebay.co.uk/itm/SINCLAIR-ZX-SPECTRUM-2-GREY-128K-CUSTOM/171109564816?_trksid=p2047675.m1850&_trkparms=aid%3D333005%26algo%3DRIC.FIT%2…
... comment, you could replace the regulator and remove the heatsink seeing ... -
ZX meets Atmos[URL="http://www.ebay.co.uk/itm/SINCLAIR-ZX-SPECTRUM-2-GREY-128K-CUSTOM/171109564816?_trksid=p2047675.m1850&_trkparms=aid%3D333005%26algo%3DRIC.FIT%2…
[QUOTE=BiNMaN;719339]picking up on his comment, you could replace the regulator and remove the heatsink seeing as the tapedeck has been removed then?[/QUOTE]
If you used a switch mode regulator you wouldn't need a heatsink. -
prob with my grey +2went to turn it on today and am greeted with a black screen with small coloured blocks and a white border and nothing else can someone point me in t…
Hi,
1.at first check - psu voltage,
2. change 7805 regulator.
3. check the ram chips.
:smile: -
Possible dodgy +2 - resets when loadingSo I have a grey model +2 with a recently refurbed tape deck (new belts and cleaned heads). It might be a product of bad loading, but from what I ca…
... right). And check the voltage regulator which is attached to the ... on one leg of the regulator to get contact. I'm ... there for reading the voltage regulator (and in fact every other ... -
Possible dodgy +2 - resets when loadingSo I have a grey model +2 with a recently refurbed tape deck (new belts and cleaned heads). It might be a product of bad loading, but from what I ca…
... tab where the 7805 voltage regulator attaches to the black metal ... , or with the 7805 voltage regulator, you could short a pin ... tab of the 7805 voltage regulator).
[I][B]Mark ... -
48k+ Power Supply quickieGuys, Can someone tell me if I can safely use the power supply of the 48k+ in a 48k? My guess is yes, but I don't want to do something I will regre…
... a "normal" PSU the voltage regulator will be destroyed and possibly ... -
ZX Spectrum clock signals comparedI haven't searched for this on WoS; it might have been posted before. But I think it's important info, and can't do any harm to repeat or show from a…
You can build one without a delay, but you'd have to upgrade the 5v regulator to handle the ONE POINT TWENTYONE GIGAWATTS! -
IF1bis StabilityI just thought I would start a different thread relating to the IF1bis, and leave the copyrighters to it elsewhere...:-P I've had mine for a few mon…
... with a different PSU/Voltage regulator.
I have no ... -
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…
... try it using a pre-regulator ([URL="http://www.worldofspectrum.org ... ?t=44637&highlight=Pre-regulator"]see here[/URL]) or use ... -
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…
... conditions), performed a recap and regulator replacement.
I've ... -
First time capacitor replacementHi, I have an Issue 2 board, that i wish to start with recapping as advised on here, as they look to be all original. (Same with V3 board, but going…
... be worth changing the 7805 regulator as well as these have ... -
First time capacitor replacementHi, I have an Issue 2 board, that i wish to start with recapping as advised on here, as they look to be all original. (Same with V3 board, but going…
... night, very informative, the voltage regulator didn't meet the requirement ... -
New hardware for Spectrum from ShaosI have some ideas for new ZX-peripherals and quickly designed a prototyping board for experiments: [URL=http://nedocon.com/store/speccy/][IMG]http:/…
... +9V to power a voltage regulator that creates independent +5V on ... -
First time capacitor replacementHi, I have an Issue 2 board, that i wish to start with recapping as advised on here, as they look to be all original. (Same with V3 board, but going…
... .rapidonline.com/Electronic-Components/7805-Regulator-To-220-tru-47-3313 ... .rapidonline.com/Electronic-Components/7805-Regulator-To-220-tru-47-3313 ... -
First time capacitor replacementHi, I have an Issue 2 board, that i wish to start with recapping as advised on here, as they look to be all original. (Same with V3 board, but going…
[QUOTE=Edge;727374]This one?
[URL]http://www.rapidonline.com/Electronic-Components/7805-Regulator-To-220-tru-47-3313/?sid=592d69cb-28e6-4142-aab1-b6d9af857a52[/URL][/QUOTE]Yes :)
[I][B]Mark[/B][/I] -
Opus Discovery OddnessHi everybody, I'm busy trying to repair an Opus Discovery for a customer. It's proving to be quite frustrating. First off, the LM317T regulator fo…
... />
First off, the LM317T regulator for the 5V was producing ... -
Getting aquainted with the IF1bisToday, fifteen days after dispatch, the IF1bis arrived at my door. In perfect order. No customs, no TVA and no handling fee involved. The arrival of …
... thermal paste to the voltage regulator/heatsink.
The spectrum ... -
Getting aquainted with the IF1bisToday, fifteen days after dispatch, the IF1bis arrived at my door. In perfect order. No customs, no TVA and no handling fee involved. The arrival of …
... thermal paste to the voltage regulator/heatsink.
The spectrum ... -
FS: Toastrack[URL="http://www.ebay.co.uk/itm/111188603251"]Here[/URL]
... had a higher rated voltage regulator fitted, new transistors and has ...
