Iron - connecting a power supply from an IBM PC to power the Hayes modem.

(C) Without Denomination Group'98         
                                          
  Good health to you, dear fans
ki of the brilliant creation of Sir Sinclair!    
                                          
  C  by you   again  "Without Denomination
Group", and still the same Mg. POWer.           
                                          
  At least  "GREAT AND TERRIBLE" :) and advised
I need to be  enough  brief on pain
"curses  eternal upgrade", I still
I’ll make a small lyrical digression.  
                                          
  I am very pleased with the fact that in addition to writing
sania  v lasttime for upscale
software,  connection Hayes-compatible module
dema gave  Specky  as if a second wind,
second  life.  That urgent need has disappeared
the possibility of purchasing a "pisyuk" only for semi-
the possibility of access to the outside world. A
because a very large number of spectrumis
Comrade left Specky precisely because of the information
matorial vacuum, feeling lonely
in  your plans, ideas, when everything is around
flickering"blue tsapsulators" and almost none
not  one  like-minded person (especially this
noticeably by people living  in the outback). And
this is really  so. The man doesn't know
that Spectrum is more alive than all the living! He can't
sob self-realization on your favorite
Specky, since  there is no stimulus for
creativity  by  due to the lack of people,
able to appreciate his work. Availability of a modem
and  output to the network will help in some way
solve  this problem.  I  I'm not even talking about
the opportunity to always be in the thick of things -
tium  Spectrum scenes,  possibilities
prompt receipt of the latest software
that, possessing  the most  new information,
capabilities  most  productive
writing  joint  developments (which ac-
tive  used by our group), and
just  communication with people of your own interests
sov.                                      
 In a word, my advice to you: if you
there is a  phone,   do not  miss this
opportunities and without delay connect to your
you Speccy modem - not you will regret it. Good
soft for  this already  written and permanently
being improved:  S-Terminal, Melon, Zed,
S-Tosser,  Lara. Many thanks to all the
tors of these developments!                  
                                          
  We  will try  to make your life easier
when connecting a Hayes-compatible modem,
to  creation unforgettable  Sir  Clive
Sinclair.  This development will allow you to
bypassing  purchase of a PC power supply (price
which is  an important limitation
important  factor when  decision making
connection), with minimal costs you-
reap,  besides  already  available  +5  and +12V,
so  necessary  modem  -5  and -12V. Her
advantages -  cheapness,  reliability, and
simplicity manufacture. For this you need
you can fork out only on trans-
former,  4  diode (1 diode bridge), 3
capacitors and 2 negative stabilizers
ny voltages. (At prices of 1997, I
this pleasure cost no more than
30 thousand as opposed to 200 thousand for RSshny B/P). Well
and,Naturally, minimum requirements are required
know how to handle   with a soldering iron. Should
also  mark that that this device is used
is used _only_ as an additional device -
to what we already have (as we believe:)
you power supply at +5 and +12V.           
                                          
                                          
                                          
                                          
                                          
                                          
    The device diagram is given below.     
                                          
                                          
                                          
                                          

  All  details  easily fit on the board
sizes 100 X 50. Transformer, in principle
circuit, can be any with output voltage
from 12 to 16 volts, for example TVK-110-
L-2. Negative voltage stabilizers
These are taken  imported - 7905, 7912, but
their domestic analogues will also arrive. When you-
juice heating the latter, they need to be
Install on the  heat sink  radiator.
Rectifier  blockKTSCHO5A can be replaced
on  KTSCHO2E,  or  four series diodes
D226,  D229, D7,  including  them along the pavement
scheme. Capacitors C1-C3 type K50-6. And the most  most importantly! Don't forget to connect
the “ground” of this power supply with the “ground” of the one
you!                                      
                                          
  In  result you will become  owner
simpleand cheap, reliable bipolar
power supply. :)                    
                                          
 This scheme  has been tested  and  works
majority of members of Samara S-Net.       
                                          
                                          
 With all questions and wishes, you can
please contact  at addresses 2:SOS7/l0.42@fidonet
Oleg Pritulaor  S-Net@hello.to by specifying
nim Logins  POWer or  Spider  in field
Subject of the message. (More  about how
write in S-Net, you can find out from the article,
dedicated to the Samara network).              
                                          
  See you in the vastness of FIDO and S-Net! :)
                                          
                POWer & Spider (20.l0.98)
                                          
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