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Voltage SchmoltageOk then. Don't flame for wanting to use a C64 tape deck for this - it was the only one I have to hand which may be cannibalised for the purpose. So …
... know that we can connect 12v to 5v gnd to get ... -
PC Power supply for SpeccyHi all, after 13 years with out playing spectrum games I am eager to play the old games. Thus I got up to the garret checking my old stuff. Two of m…
... . It misses the -5V and +12V at the 4116 (lower?) RAMs ... which delivers the -5 and +12V direct to the RAM. The ... are the 9V and the -12V are used anywhere in the ... -
PC power source and Spectrums.I'm planning to use a basic PC ATX power source (300W) for all my sinclair equipment, but I have two questions: - I've read about some nasty things …
... would you use in +12v, +5v and -12v in a +2A and ... a PC power source? Using +12v and relying on the 7805 ... -
Mb02+ideAs I wrote in the hardware forum there will be a small number of a redesigned MB02+IDE (nearly the original MB02+ including IDE interface also for CF…
... +48 or +2) or a 12V power source
Depending ... -
Adventures in Programmable Logic Part 2So, now armed with an Xilinx Parallel III cable, an XC9536 CPLD, a breakout board with power, a JTAG pin header and a 44-pin PLCC socket, I could try…
... supply lead accidentally contacted the 12V supply to the breadboard. While ... -
Spectrum +2 power supply - voltages on each pin..?My +2 suddenly stopped working yesterday. It was working fine earlier in the day and now the power light will not go on, nor will the tape drive and …
... ) do seem to be giving 12v as the supply indicates according ... -
sinclair zx spectrum issue 6a (again) - how to repairHi All, Is there someone who may explain what these jumpers can be used for. [url]http://forest.no-ip.org/repair/jumpers.gif[/url] <- this is from …
Hi All,
Is there someone who may explain what these jumpers can be used for.
[url]http://forest.no-ip.org/repair/jumpers.gif[/url] -
Did you publish any hoax back in the day?I did tons of those. I need to explain the "setting" though: Around 1990, we had this computer classifieds magazine printed on thin crappy recycled p…
... change it from 6 to 12V to play the Gameboy games ... -
ZX48K bad videoI have 48K with bad RF video output: [URL="http://www.fileden.com/files/2007/6/28/1218776/Amiga/ZX48K_IMG_1219_up.jpg"]photo[/URL] It seems to work o…
... used generic +3,+6,+9,+12V stabilised DC power that can ... do max 1000mA on +12V.
I read that speccy ... -
RGB Peritel 8 pin output to 6 pin TTL RGB Cub monitorHi, I've recently acquired a Microvitec Cub monitor, children of the eighties may remember these as they were the standard monitors used in schools w…
... Spectrum?s RGB out uses 12v. Does anyone have any experience ... -
Is it possible to use external power supply for +-12; +-5 for ZX SpectrumRecently I acquired a damaged Sinclair ZX Spectrum, issue 3B. According to the maintenance manual I have to replace TR4 and TR5. These type of transi…
... transistors are for creating +12V and -12V. So probably I can use ... -
+3 compositve video out problemToday, I've tried to put a composite video out in my +3. I've built the circuit proposed [url=http://www.secarica.ro/html/plus3_hardware.html#composi…
... pin 6 in TEA2000).
- +12v soldered to pin 14 in ... pin 6 del TEA2000.
- +12v soldada al pin 14 en ... -
Scary electric businessThe tranformer that supplies 12V to my monitor has started to leak. I suppose it's the capacitor inside. Should I hunt down a different one? Is it sa…
The tranformer that supplies 12V to my monitor has started to leak. I suppose it's the capacitor inside.
Should I hunt down a different one? Is it safe to continue using for now? Is it worth it, to try to get it fixed with new capacitors? -
128K +2 (Grey) no image output.Got an 128K +2 Grey that works in every aspect except no image (neither from RF or RGB), swaped the RF from my 48K+ witch was working well and tested…
... , my +2 doesn't get +12v to the Teac2000, only reads ... of my +2 is the +12v line.
Any ideas how ... can repair it? I think +12v is only required for the ... -
Issue 3B problemHi! I have an issue 3B board that is having a strange problem: when I got it it didn't had the -5V and +12v, as usual. After replacing TR4 and TR5 t…
... 't had the -5V and +12v, as usual. After replacing TR4 ... -5V came back, but the 12V are actually 11.10V... :-?
Seikosha GP-50S questionI have this old Speccy printer without the original power supply. I know it needs a 18.7V - 600mA DC power supply. Unfortunately I just have a maxi…
... I just have a maximum 12V - 1.2A universal PSU with ... />
Can someone confirm that 12V could be enough for this ...Spectrum +3 drive operating tipsFrom my personal experience. If you have replaced the belt and your speccy's drive still doesn't operate , check the following a) Measure the output …
... you don't get the 12v , your drive doesn't get ... output again. There should be 12v supplied and your drive will ...ZX Spectrum Power SupplyHi All, I've come across a power supply that is currently registering 14.5v before it is plugged into the Speccy. I have another one that registers…
... have another one that registers 12v and I've read somewhere ... that anything above 12v can kill the Speccy.
Spectrum 128+ (No TV picture)I got a Spectrum 128+ which is not generating any picture. I checked the TEA2000, and it gets not 12 Volt, but only 1.4, so this is the problem, I gu…
... and 9V are all okay, -12V is in reality +11.4 ...Midi out on a ZX SpectrumYears ago (may be over 15 years...) I soldered a small adapter that lets a keyboard or synthesizer connect to the ZX Spectrum 128K's midi/RS232 port.…
... the TX signal (pin 2), 12V (pin 6) and ground (pin ...Test / comments wanted: new composite video output for +2A/+3I've been fiddling with the composite video mods for +2A and +3... with no luck. Because neither desings in [url=http://www.secarica.ro/html/zx_zone.…
... mods for +2A/+3 needs +12v, but mine needs only +5v ...48K Speccy Repair Log.Some people may know my love for writing up my repairs of arcade PCBs on various forums so thought I would do the same for this little fella. Had th…
... power supplies, each chip needs 12V, 5V and -5V and if ...Spectrum 128K RS232 to PC serial cableIf you have read some of my recent posts then you will know that I am eager to link my Spectrum +3 to a PC. This will be done by wiring a standard PC…
... Clear To Send
6 +12V
PC COM port ... pin 6 as it is +12V!ZX Spectrum 48K, issue - works fine till it gets hot (?)ZX Spectrum 48K, issue 2, works just fine, tested with Winston's diag board. At a certain moment in time however, it seems to run hot and stalls. Whe…
... the lower memory chips (+5V, +12V, -5V).
Which component ...Possible design fault in +2A/+3 power pack. Fix?It's the second time a +3 power pack ceases to work when I make a short while using the scope to diagnose a +2A/+3 computer. And it's the second tim…
... is a direct path from 12V to GND coming through the ... 2N2222 collector pin and the 12V supply line, as this transistor ...Fully integrated ZX+Hi, I just want to show some inspiration for integration HW to ZX+ case ;-) - ZX48 issue 3 board, without all parts regarding video generating (pa…
... from board) and -5 and 12V inverter
- scandoubler which catch ...+2A / +2B / +3 Power Supply QuestionIf I'm going to put a switch in the power lines of a +2B, do I need to switch the +5V, +12V and -12V all off to make it safe to remove peripherals, o…
... to switch the +5V, +12V and -12V all off to make it ... +5V and the two marked +12V connected internally, or are they ...
