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Spectrum 128 +2 greyhi all, nice to be here, i am trying to reborn my spectrum and i need some help please, i get a new 79s05 to replace, also a bc307 to replace the…
... not the same for the polarity cbe/ebc (i dont know ... -
Miniproject for the ZX Breakout: ZX SPIFor those of you who have a ZX Breakout or are building one (or have something with a CPLD that hangs off a Spectrum), I've just finished a mini-proj…
... /> - Supports CPOL 0 (normal clock polarity) and CPOL 1 (inverted clock ... polarity)
- Synchronous design that should ... -
SpecBAS 0.780 releasedHi all - Back again with a new SpecBAS release! It's all been about arrays this time around, and to add to those lovely associative arrays from las…
... spec. Add, sub, mul, scale, inversion, identities etc
BIN from ... -
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…
... also includes both input reverse polarity protection and a power on ... -
Diodes placed the opposite way in +2A/+3 PCB'sI was just going to report this as a mistake in the schematics drawn by Guesser, but I saw a real board and realize that the schematics are right. […
... gate array actually does this inversion all the time or only ... cycles, or .. there's no inversion at all and I'm ... -
Spectrum +2 power supply replacementI bought my first Spectrum the other day, a grey +2, but it seems that the power supply is busted (I've tested it with a multimeter and tried replaci…
... work, if I reverse the polarity so it's centre negative ... -
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…
... PSU, if I reverse the polarity so that negative is on ... -
DivMMC EnJOY! I do enjoy!!!!!Hi all! Ok, so I grew up in the UK in the 80?s and convinced my parents to buy a 48k Spectrum ?to help with homework? lol. Well now I am older and ha…
... has now got the correct polarity. ( inner being negative, outer positive ... -
populated Harlequin Rev.D -> Rev.FHi, I like to sell my Harlequin Rev. D board. I modified it to be identical to Rev. F: * switching regulator instead of linear regulator for DC in …
... connector (Rev D has same polarity as at CPU)
* smooth ... -
ZX Spectrum+ DivMMC EnJOY! Grundig 16" LCD TV and books.The Spectrum is in very good condition. Composite video mod. New mambrane (bought in November 2014 from rwap_software [url]http://www.sellmyretro.co…
... to output socket with correct polarity.
- Replaced DC input socket ... -
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…
... ? Perhaps someone stick the wrong polarity in it or something? Any ... -
ZX 48K power plugHi! I'm a newbie, this is my first post. I have a ZX Spectrum 48K, which has been lying around for ages. Its psu lacks a plug. The Psu is 9v and 1…
... need has to have 'revesed polarity'.
Do any of ... -
Issue 2 48k Yellow DisplayHi guys. As the title says, I have an issue 2 that's displaying the typical yellow/green colour screen at switch on. The picture is clear and stab…
... good. Installed in the correct polarity.
TR4 TR5 removed, checked ... -
Issue 2 48k Yellow DisplayHi guys. As the title says, I have an issue 2 that's displaying the typical yellow/green colour screen at switch on. The picture is clear and stab…
... good. Installed in the correct polarity.
TR4 TR5 removed, checked ... -
How to connect universal PSU?A fleamarket find! Spectrum+ without PSU. :) I don´t know if it works. I have universal PSU, please confirm which is the correct polarity? [b]A)…
... confirm which is the correct polarity?
[b]A ... -
No Keyboard after recap - ZX Spectrum 48kGuys I am desperate. I did a recap of the ZX 48k board and now the keyboard is not responding to any keypress :-(. I paid attention to the capacitors…
... paid attention to the capacitors polarity of course and used sometimes ... -
Bit of fun - one change onlyI also posted this on another marque's forum (for their products) to see. Its just a bit of fun really. OK, if you could of made one change to a S…
... "a reset switch" or "reverse polarity protection", but after a bit ... -
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…
... quality one with the right polarity . I am hoping that as ... -
binary inversioni know this is a bit of a maths question but how to i find the decimal opposite of an 8 bit binary number? like inverting all the bits? so say 255 be…
i know this is a bit of a maths question but how to i find the decimal opposite of an 8 bit binary number? like inverting all the bits? so say 255 becomes 0 and 0 becomes 255.
like 11111111
00000000 -
Direct drive LCD screen - looking for information on previous projects people may have attempted.Hi All, My first post, so please forgive and guide if I've posted in the incorrect section. I'm a speccy user from way back in the 80's, but m…
... end when I accidentally reversed polarity on a power supply supplying ... -
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…
ZEsarUX 9.2 Release CandidateHi! I have uploaded a new ZEsarUX Release Candidate version 9.2. The final stable version will come in a few weeks, so stay tuned! You can down…
... -to-pixel text rendering (color inversion)
Fixed DivIDE/DivMMC mapram ...ZEsarUX v9.2 Final released - Version 9.2 - Cliff Hanger edition. 05 April 2021As seen on: https://github.com/chernandezba/zesarux/releases [quote] ZEsarUX-9.2 @chernandezba chernandezba released this 21 hours ago · 6 com…
... -to-pixel text rendering (color inversion)
Fixed DivIDE/DivMMC mapram ...Voltage/current meterToday I went to my local electronics shop and found this model of voltage and current meter, readily assembled with DC plugs at either ends... :P …
... it only reads if the polarity is reversed to more usual ...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…
All you needed was a PSU that is 9V DC 1.4A or more regulated, -ve centre polarity.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…
... specially with the voltage and polarity of the connector. Remember to ...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…
... the considerations about voltage and polarity).
If the problem is ...spectrum48k power supply?Hello, I live in the U.S. and I need to get a power adapter for the spectrum 48k comparable to the original. I needed to know all the specifications…
A word of caution - if using your own supply don't mix up the polarity - A CSS poster recently mentioned a blown Speccy because of this...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 …
... input. When you reverted the polarity this destroy the regulator (7805 ...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 …
... :
if you revert the polarity of the power supply, you ...
