-
Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
... ground and some voltage (say +12V), you could have turned every ... .
If you shorted 5v to ground then you've ... transistor (T1). If you shorted 12v then the 7812 linear regulator ... -
Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
In theory if the +12V supply was shorted to 0V / ... time.
If the +5V supply was shorted to 0V ... , if you shorted the +12V supply to the +5V supply. Now, this ... chips that run off the +5V supply on the +3 board ... -
Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
... circuit) working and feeding it +12V where it expects zero, could ... should work with just the +5V feed -- obviously the floppy drive ... -
Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
... he says that shorting 12v to ground will fry ... ) working and feeding it +12V where it expects zero, could ... some chips.[/QUOTE]
12v with respect to what, and ... the ground plane to 12v then all the chips ... 7v across them if the 5v supply remained at 5 volts ... -
Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
... ) working and feeding it +12V where it expects zero, could ... circuit.
Accidentally shorting +12v to a signal line - yes ... few ICs. Or shorting +12v to +5v could do some damage. But ... the voltage (on either +12v or +5v) upstream of the short circuit ... -
Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
... I can see the +5V & +12V rails/wires but what about ... PSU:
+5V @ 2A
+12V @ 0.7A
-12V @ 0.05A
For +5V: W1=5V*2A ... , W1=10W
For +12V: W2=12V*.7A, W2 ... -
Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
... scaremongering?
12v with respect to what, and ... you ask, 12V with respect to the 5V that the ... "fed" 5V through the Vcc line, 12V from the ... supply that provides the 5V, is still 12V.
Surely, ... s ground plane to +12V, even momentarily the ground ... -
Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
Pretty sure if you shorted 12v to ground it could only ... /> On the load side, the 12v and ground would be at ... /> Now if you shorted 12v to the 5v line, that's a ... -
Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
... computer's ground plane to +12V, even momentarily the ground plane ... pull the ground up above +5v at any point on the ... whole thing by shorting the +12v/GND lines, given that you ... lower than the impedance to +12v with the design of that ... -
Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
... of +5 and +12V will be +5 and +12V ABOVE whatever the ... 's ground trace locally reach +5v relative to the ground as ... supply by shorting it to +12v, I will cook and eat ... -
Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
... slot. I would have thought 12V on many of those edge ... short on the 12 and 5V lines would do - raise the ... +5V line to +12 for a ... -
Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
... I would have thought 12V on many of those ... edge connector near the 12v wire is the output ... very close to the 12v wire (this would be ... the one connected to 5v to be too far ... short on the 12 and 5V lines would do - raise ... the +5V line to +12 for a ... -
Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
... to short the +5 and +12V lines together. At least on ... see how you'd short 12v to 5v without also shorting them ... short diagonally from the 12v wire to the 5v of D1 if ... -
Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
... DMM probes - one on the +5V and the second on the ... , one on the 5V line, one on the 12V. Then the two ... -
Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
... , one on the 5V line, one on the 12V. Then the two ... -
Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
... machine, on either the +5V or the +12V supply (but not a ... -
Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
... voltage measured across the load (+5V terminal to 0V terminal) ....[/QUOTE ... kill the hypothesis that shorting +12v to GND on a +3 ... 's supply, but on the +12v side you have to take ... ). So the impedance of the +12V supply is probably an order ...Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
... the less critical +12V. After all, the +5V, the +12V and the low ... current -12V all have return ... the 0V/GND (less the +12V / -12V difference current flow that can ...Spectrum +2A PSUI picked up a black +2A without a power supply. Looking on eBay the PSUs seem quite rare. The schematics for the PSU show +/-12 and 5v, would it be …
... the PSU show +/-12 and 5v, would it be possible to ... computers:-
You only need -12V if you are using the ... or Aux ports.
The +5V supply needs to be from ... a regulated PSU, the +12V is not so critical.
Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
... with the hypothesis that:
- 12v was also momentarily shorted against ... else too, for example +5v (unlikely due to the distance ... between +5v and +12 where the ... this were accidentally connected to +12V, with luck IC15 sacrificed ...Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
... no idea how isolated the 12V and 5V rails are on the ... it a possibility that shorting 12V to ground also causes +7V ... between ground and the 5V rail?
Not sure ...Spectrum +2A PSUI picked up a black +2A without a power supply. Looking on eBay the PSUs seem quite rare. The schematics for the PSU show +/-12 and 5v, would it be …
... draw will be on the 5V line, whereas modern ATX power ... of their power on the 12V line(s).Spectrum +2A PSUI picked up a black +2A without a power supply. Looking on eBay the PSUs seem quite rare. The schematics for the PSU show +/-12 and 5v, would it be …
... draw will be on the 5V line, whereas modern ATX power ... of their power on the 12V line(s).[/QUOTE]
I ...Spectrum +2A PSUI picked up a black +2A without a power supply. Looking on eBay the PSUs seem quite rare. The schematics for the PSU show +/-12 and 5v, would it be …
... 'd just make sure the 5V line is adequate. You see ... it's well distributed between 12V and 5V (mainly), theoretically 160W could ... be the sum of *any* 5V and 12V powers (100+60, 80 ...128K RGB Display problem.I have just got my hand on a toast rack, but when powered and connected to the telly the picture jumps horizontally at random intervals. Could it be…
... signal, or between 9.5V and 12V for normal 4:3 ... . Voltages less than 4.5V may switch off the SCART ... need to obtain a +12V supply from either a separate ... PSU, or get +12V from the Spectrum's RS232 ... existing wire, and connect +12V via a 100 ohm resistor ...128K RGB Display problem.I have just got my hand on a toast rack, but when powered and connected to the telly the picture jumps horizontally at random intervals. Could it be…
... signal, or between 9.5V and 12V for normal 4:3 ... . Voltages less than 4.5V may switch off the SCART ... need to obtain a +12V supply from either a separate ... PSU, or get +12V from the Spectrum's RS232 ... existing wire, and connect +12V via a 100 ohm resistor ..."Spellbox" and other rare stuff on ibejHi, I started to sell Speccy software last week. Lot of rare stuff collected over years for sale. [URL]http://www.ebay.at/sch/misutakurashiku/m.html?…
... (both ROMCS united over diodes, +12V connected where +9V is expected ... (I think at least) and +5V is enough to drive a ..."Spellbox" and other rare stuff on ibejHi, I started to sell Speccy software last week. Lot of rare stuff collected over years for sale. [URL]http://www.ebay.at/sch/misutakurashiku/m.html?…
... (both ROMCS united over diodes, +12V connected where +9V is expected ... (I think at least) and +5V is enough to drive a ...
