troubles

There was such a time, or rather 08/17/99.
The clock hands showed 22:56:00. Just on this day
Alexey Goloschapov wrote to Roman Milukov on the topic of “troubles”...

RM>>>> The VG-shka is more afraid of the lack of +5V when 12 are supplied!
WB>>> Isn’t it easier to assemble a stabilizer on one 815, which would
WB>>> fed the VG with only 12 volts, and did 5 myself?
RM>> Oh, that’s right, but it’s better to make +12 from +5 volts.
RM>> Then in some computers you can even get by with only a 5V source.

AG> I apologize for interfering with your conversation, but how then do you power the drive?
AG> Let’s say
AG> I came across quite rarely 3'5 drives do not require +12V, but I have not seen such
AG> drives for 5'25.

And power it from there. If this little thing produces 12V!!!

Well BYE to you, Alexey!

Yuri Nazarenko/Rezidnet/Discovery group
e-mail : Yuri_Nazar...@zxnet.spb.ru

... He was lying on the ground, as if he was just tired,
... And he didn’t see the one who killed him. (C) Russian size.

YN> And feed from there. If this little thing produces 12V!!!
What about current? The VG only needs about 20 mA, then a simple converter will work. By the way, this was done in the Soviet computer MC1502. There, a low-power voltage converter is assembled on the controller board. And everything is powered
from the built-in +5 power supply. Rulez.
Well, I digress from the topic: The disk drive (one 5'25)
needs at least 0.5-1.0 A of current. Here you will have to sculpt a cool converter. This is not beneficial IMHO. It's easier to create a BP with +12.
And here’s what I think is the best thing to do: build a
simple converter for the VG on the board, let it power itself from
it. If, say, a computer with a 3'5 flop works,
then the entire structure is powered only from +5.
If there is also a 5'25 flop, then, no matter how you look at it,
you need a powerful +12V source. And at the same time, you can power the VG'shka
from these 12, and turn off the converter
so that it does not create interference. This is how it was done in Orion, in my opinion. But you can leave it on your family 12 -
they are more stable, IMHO, they will be.

With the best vicheise, Sergey Orlov.

[ Team ZX ] [ Team IRON ]
...Speccy alive forever!

There was such a time, or rather 08/12/99.
The clock hands showed 21:40:05. Just on this day
Wladimir Bulchukey wrote to Eugene Tyukaev on the topic "troubles"...

WB> 09 Aug 97 20:41, Eugene Tyukaev -> Dmitry Pavlukhin:

ET>> maybe try to cool the VGshky?

WB> No. It is designed to work without additional cooling.
WB> If it systematically overheats and flies, the reasons are external,
WB> and you need to look for them.

A guy once told me (the teacher of a computer assembly class) that
you can turn off the VG with just a touch of your hand. Like there's static electricity and all that. He says five VG'sheks have already been cut down in this way.

Well, BYE'yushki to you, Wladimir!

But no, usually the “thing” is made low-power - one transistor, several
diodes, connectors... - only for powering the VGshka.

All the best.
Sincerely, Roman.

YN> A guy once told me (the teacher of a computer assembly group) that
YN> you can turn off VG with just a touch of your hand. Like there

In theory, yes, in practice, neither I nor any of my friends have ever
seen anything like this.

Regards, Alex from FFC COMPUTERS.

>E-MAIL: asde...@softhome.net ICQ: #13064553

There was such a time, or rather 08/26/99.
The clock hands showed 07:18:00. Just on this day
Evgeny Milun wrote to Yuri Nazarenko on the topic of "troubles"...

[skiped!]

YN>> He says five VG'sheks have already been knocked out this way.
EM> Nu-nu. :) Have you done experiments?

Maybe they have. I was not present. Maybe different people
at different times...

EM> Good luck! Evgeny.
EM>

Well BYE for you, Evgeny!

AL> In theory, yes, in practice, neither I nor any of my friends have ever seen anything like this
AL>.

They simply crash, and not only VG-shki.
For example, a buyer comes to the market in the frosty winter. Everyone is wearing fur coats.
He rubbed himself and rubbed himself in the crowd, then he came up to the seller: “I want a VG-shku!” He hands it over,
holding it at one end by the legs, the buyer takes it from the other end... (It would be nice to say hello by the hand first! :) Then he pays, takes it home... But the VG-shka is already
dead.
Right now even CMOS micros don’t die from small static voltages (there is protection
provided for). But a strong charge is dangerous.