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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…
... 8V), the Speccy's voltage regulator can't maintain +5V output ... /> The Speccy's internal voltage regulator can take [I]much[/I ... ] DC, or remove/bypass internal regulator and feed with +5V [I ... -
Spectrum 48K with a thyristor PSU possible?Is it posssible to use a Spectrum 48K with a thyristor switched PSU? I have a PSU with a thyristor, 4 diodes, one electrolyt capacitor, some resistor…
[QUOTE=-Micky;427736]Oh, I forgot to list the transformator. Micky[/QUOTE]
In this case you can set it to 9 Volt and connect to the 48K.
This "thyristor" is one adjustable voltage regulator chip like the LM317T. -
Spectrum 48K with a thyristor PSU possible?Is it posssible to use a Spectrum 48K with a thyristor switched PSU? I have a PSU with a thyristor, 4 diodes, one electrolyt capacitor, some resistor…
[QUOTE=Gods;427793]In this case you can set it to 9 Volt and connect to the 48K.
This "thyristor" is one adjustable voltage regulator chip like the LM317T.[/QUOTE]The thyristor is a SO817MH.
Micky -
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…
... package ( The same as 7805 regulator) and it has different pins ... -
Spectrum 48K with a thyristor PSU possible?Is it posssible to use a Spectrum 48K with a thyristor switched PSU? I have a PSU with a thyristor, 4 diodes, one electrolyt capacitor, some resistor…
... ) switching mode step-down voltage regulator! The use of a transformer ... -
Which reset method on ZX 48K?What reset method is correct on issue 3b ZX 48K: One wire to R68 and one to C27 (Manual from ZX Spectrum +) or One wire to Pin 26 from CPU and one …
... [/URL] ('Reg' is the voltage regulator, to which the aluminium heatsink ... -
What these?While I was scanning some material from Eric Deeson I came across a couple of pieces of hardware I haven't seen before. [url]ftp://ftp.worldofspectr…
component out?I would like to connect ZX48K to plasma TV with component cable. I read somewhere that signals are on the expansion edge connector. Do I need somethi…
... switching transformer, and the 7805 regulator, so he can feed 5V ...component out?I would like to connect ZX48K to plasma TV with component cable. I read somewhere that signals are on the expansion edge connector. Do I need somethi…
... switching transformer, and the 7805 regulator, so he can feed 5V ...component out?I would like to connect ZX48K to plasma TV with component cable. I read somewhere that signals are on the expansion edge connector. Do I need somethi…
... switching transformer, and the 7805 regulator, so he can feed 5V ...My Spectrum has gone a bit dud since doing some Mods, HELPMy father in law and I did some modifications to my 48K rubber key Spectrum last weekend, and now it seems to be very keen to crash, especially when …
[QUOTE=Alien 8;439146]Thanks Micky. The 7805 being the regulator I presume?[/QUOTE]Yes.
MickyMy Spectrum has gone a bit dud since doing some Mods, HELPMy father in law and I did some modifications to my 48K rubber key Spectrum last weekend, and now it seems to be very keen to crash, especially when …
Make a test and touch the heatsink and the regulator. Move the finger something. If the ZX then crashes it is the 7805. If not then I guess it is the keyboard membran.
MickyMy Spectrum has gone a bit dud since doing some Mods, HELPMy father in law and I did some modifications to my 48K rubber key Spectrum last weekend, and now it seems to be very keen to crash, especially when …
... touch the heatsink and the regulator. Move the finger something. If ...My Spectrum has gone a bit dud since doing some Mods, HELPMy father in law and I did some modifications to my 48K rubber key Spectrum last weekend, and now it seems to be very keen to crash, especially when …
... a 7805 with a switching regulator, often this involves parts ... from damage. With a switching regulator in its place, it' ... wiki/Low_dropout_regulator"]low-dropout[/URL] regulator, and input a [I] ... (around 6~7V depending on regulator type).
Does ...My Spectrum has gone a bit dud since doing some Mods, HELPMy father in law and I did some modifications to my 48K rubber key Spectrum last weekend, and now it seems to be very keen to crash, especially when …
... /wiki/Low_dropout_regulator"]low-dropout[/URL] regulator, and input a [I]regulated ... (around 6~7V depending on regulator type).[/QUOTE]
Agree ... hard-pressed TR4/5 switching regulator to work a little harder ...Remove +12 Volt itemsWhich items can be removed on a ZX48K issue 4b PCB if I don't need the +12 Volt? Micky
... possibly cause problems. The 5v regulator (7805) is then required to ... heatsink to avoid damaging the regulator.Remove +12 Volt itemsWhich items can be removed on a ZX48K issue 4b PCB if I don't need the +12 Volt? Micky
... possibly cause problems. The 5v regulator (7805) is then required to ...Two Odd Spectrum 128K FaultsI also have 2 Spectrum+128 machines with heatsinks. 1. Did not power up properly - I replaced the 7805 regulator and cleaned the edge connector and …
... properly - I replaced the 7805 regulator and cleaned the edge connector ...How to fix dc voltage on a 48+ psuAfter dinner, after a womble video out mod on a "new" purchased 48+ , just in the remaining time I tested the voltage of its psu and, surprise surpr…
... is completely unregulated, the voltage regulator and other supply circuitry (that ...DivIDE and joystick interfaceWhich joystick interface works with the DivIDE and ZX 48K? I have TurboRAM but it works not correct or blocks DivIDE. Multiface One works with the j…
... direction to replace the 7805 regulator in a issue 3 48K ...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…
... 's known as a linear regulator, and effectively it reduces the ... /> The other common kind of regulator is known as a switching ... regulator (or switch mode power supply). ...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…
... 's known as a linear regulator, and effectively it reduces the ... /> The other common kind of regulator is known as a switching ... regulator (or switch mode power supply). ...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…
... that work then? cause the regulator still has to waste the ...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…
... that work then? cause the regulator still has to waste the ... [/URL] housing? Better regulator-heatsink contact -> regulator temperature closer to heatsink ... would care (as long as regulator+heatsink combo is up to ...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…
... that work then? cause the regulator still has to waste the ...Who can repair a 48K Spectrum?My Spectrum is broken, please see: [url]http://www.worldofspectrum.org/forums/showthread.php?t=29351&highlight=7805+heat+sink&page=2[/url] Does anyb…
Is it the 7805 regulator that you are talking about ...Who can repair a 48K Spectrum?My Spectrum is broken, please see: [url]http://www.worldofspectrum.org/forums/showthread.php?t=29351&highlight=7805+heat+sink&page=2[/url] Does anyb…
... ;462059]Is it the 7805 regulator that you are talking about ...Who can repair a 48K Spectrum?My Spectrum is broken, please see: [url]http://www.worldofspectrum.org/forums/showthread.php?t=29351&highlight=7805+heat+sink&page=2[/url] Does anyb…
... instabilities, but either a voltage regulator is killed entirely or the ...Who can repair a 48K Spectrum?My Spectrum is broken, please see: [url]http://www.worldofspectrum.org/forums/showthread.php?t=29351&highlight=7805+heat+sink&page=2[/url] Does anyb…
... instabilities, but either a voltage regulator is killed entirely or the ...
