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+3 ProblemsI have been having a few problems with my +3 and I am wondering if anyone can help or give me some advice: 1. I have 2 blank disks which I have save…
... switch signal, when you put +12V on it, it tells your ... +3 has 2 pins with +12V on it, both connected through ... , make cable that connects original +12V to SCART pin 8 (function ... 's suggestion, and check if +12V pin on the +3's ... -
damaged spectrum+ (blinking squares)Hi, Sorry for my poor english, but I couldn't find on family forums any remedy for my hardware problem with my first speccy in my life :) I've bought…
... 23A is not delivering -12V as the manual says, ... but +12V.
Quoting Dickens' hardware ... is therefore an unsmoothed +12V supply".
Dickens mentions ... real life somewhere around 12V,
B22,B23 ... is the generated +12V which often is a ... -
Some ROM/EPROM questions...I've got a ZX Spectrum +, a +2A and +3 computers, and I've been using +3e project ROMS for a while in my +3. I was thinking about using an EEPROM or…
... mentions 14V for erase, and 12V for programming - maybe there's ... -
Challenging the orthodoxy - Composite modWell, what's brought this on is two things: firstly I composite-modded an Issue 4S board this weekend in preparation for the Vintage Computing Festiv…
... with low peaks some 100 mV over ground and no problems ... -
Some ROM/EPROM questions...I've got a ZX Spectrum +, a +2A and +3 computers, and I've been using +3e project ROMS for a while in my +3. I was thinking about using an EEPROM or…
... Spectrum, so using +14v or +12v wouldn't be a problem ... -
+3 needs putting out of its misery[URL="http://cgi.ebay.co.uk/SINCLAIR-ZX-SPECTRUM-3-128K-FDD-GAMES-CLASSIC-VINTAGE-/270590074074?cmd=ViewItem&pt=UK_VintageComputing_RL&hash=item3f006…
... system but fails on the 12V the drive needs, and that ... -
+3 needs putting out of its misery[URL="http://cgi.ebay.co.uk/SINCLAIR-ZX-SPECTRUM-3-128K-FDD-GAMES-CLASSIC-VINTAGE-/270590074074?cmd=ViewItem&pt=UK_VintageComputing_RL&hash=item3f006…
... system but fails on the 12V the drive needs, and that ... -
grey +2 psu on an original 128?I have a 128 and both +2's.. a / b.. I notice one PSU is the same as the 128 , just grey and the 128 PSU I have is, well I will get it looked at .. i…
... , +12V 700mA, -12V 50mA
ZX+2A/B: 5V 2A, +12V 200mA, -12V 50mA ... -
+3 needs putting out of its misery[URL="http://cgi.ebay.co.uk/SINCLAIR-ZX-SPECTRUM-3-128K-FDD-GAMES-CLASSIC-VINTAGE-/270590074074?cmd=ViewItem&pt=UK_VintageComputing_RL&hash=item3f006…
... system but fails on the 12V the drive needs, and that ... -
testing if speccy is fully functionalHi, There is so much mention of T states but still confused. Does this mean if an instructin is out by a T-state or more then the speccy is faulty?…
... to check the +5V/-5V/+12V lines though.
Between ... -
Amstrad MP3 TunerNot Spectrum related but may be of use to someone. Seems like the MP3 Tuner for CPC computers is pinned the same as the output of CPC's: 6 pin DIN,…
... You will need an additional 12V power source.
[QUOTE ... -
+3 psu schematics and partsHi everyone. Does anyone have or knows where to get the +3 psu schematic? I'm trying to repair one but i cant find any info on the parts reference. …
... it's more likely a 12V zener diode.
A ... -
+3 psu schematics and partsHi everyone. Does anyone have or knows where to get the +3 psu schematic? I'm trying to repair one but i cant find any info on the parts reference. …
... . Your are completely right with -12v signal. The 4x1n4001 and C8 ... -
+3 psu schematics and partsHi everyone. Does anyone have or knows where to get the +3 psu schematic? I'm trying to repair one but i cant find any info on the parts reference. …
The -12V supply is correct, no need to change, negative pin of C2, C8 have to connect -12V signal.
For R6, middle pin (pin3) have to connect either pin 1 or pin 2. -
7805 Regulator HelpI am hoping to replace the 7805 regulator in my issue 3 48K Spectrum soon. Unfortunately I don't know exactly what to buy to replace it with (my fat…
... supply). The rather easily damaged +12v / -5v circuit on the Spectrum ... -
7805 Regulator HelpI am hoping to replace the 7805 regulator in my issue 3 48K Spectrum soon. Unfortunately I don't know exactly what to buy to replace it with (my fat…
... supply). The rather easily damaged +12v / -5v circuit on the Spectrum ... -
Digital RadioWell, it looks like the switchover to digital radio may be delayed (it is planned for 2015) due to the slow uptake of DAB systems. A report by the BB…
... it must be supplied with 12v, thankfully this can be supplied ... -
Issue 2 issue (...)Just acquired an issue 2 Spectrum 48 K, selled as working board, not working keyboard. Before testing it with a psu I opened the case and discovered …
... /resistor mod : 4k7 resistor from +12V to pin 30 on IC2 ... -
Issue 2 issue (...)Just acquired an issue 2 Spectrum 48 K, selled as working board, not working keyboard. Before testing it with a psu I opened the case and discovered …
... /resistor mod : 4k7 resistor from +12V to pin 30 on IC2 ... -
Issue 2 issue (...)Just acquired an issue 2 Spectrum 48 K, selled as working board, not working keyboard. Before testing it with a psu I opened the case and discovered …
... IC(x) pin(y) to +12V" (instead of+5V) I do ... see no reason for using +12V there, the 'intermediary' resistor offers ... -
Issue 2 issue (...)Just acquired an issue 2 Spectrum 48 K, selled as working board, not working keyboard. Before testing it with a psu I opened the case and discovered …
... is low). BTW: indeed not 12V but 5V!!
Edit ... -
Issue 2 issue (...)Just acquired an issue 2 Spectrum 48 K, selled as working board, not working keyboard. Before testing it with a psu I opened the case and discovered …
... Z80's A0 line and +12V. Indeed the repair guide (page ... 4.5) says 12V, where I think +5V should ... patch using 5V instead(!) of 12V, R=3K9, just for noticing ... -
Schematics for loading amplifier?I'm interrested in making an external portable amplifier in order to be able to load speccy games using an mp3 player. I looked in the internet but c…
... says it works with 4-12V so a 9V alkaline battery ... Power Supply Voltage : DC 4 - 12V.
PCB Size : 50 x ... -
Broken ZX Spectrum? :(Hi! I bought a 2nd hand ZX Spectrum half a year ago. It worked perfectly fine when I first tried it. I put it back in its box which it was sent in, …
Broken ZX Spectrum? :(Hi! I bought a 2nd hand ZX Spectrum half a year ago. It worked perfectly fine when I first tried it. I put it back in its box which it was sent in, …
newbie: on/off and video outputHello, having a lot of 8bit computer I tried the scart cables I have one gave me a scrolling image the other one gave me a good picture but no sound …
... the switch on +5V and +12V would give less 'shock' when ...Sir Clive - *** machine, or washing machine engine?It surprised me in Micro-Men to see Sir-Clive as having a bit of an eye for the ladies. Are there any rumours about if this was a regular thing with …
[QUOTE=Winston;467852]I'm afraid that's urban legend. Washing machine motors are a different type (synchronous brushless AC motors that run on 240V AC), but the C5 had a brushed DC motor running off 12V DC.
[/QUOTE]
:-o doh!