DO YOURSELF - Do it yourself today is dedicated to the comrades who feed our specks with voltages of five and twelve volts.

=========================================================SELAY SAM=====
                                                        
 BP SA KILLER
do it yourself today is dedicated to the comrades who feed our
specs with voltages of five and twelve volts.  article
it is written a second time because the first time everything is already
it was almost ready my spec chipped in at magic a thc gom
It was there for 92 years, but my spec just didn’t fall out on the monitor
(because he wasn't there).                            
                                                        
everyone knows that the cause of 90% of malfunctions is
low quality power supply  sad as it is, he can
is the cause of overheating of the entire spec as a whole, maybe any
The power supply gets quite hot during operation...           
                                                        
BPs come in two types - pulse and classic -
transformer.  both have merits and
disadvantages.  pulsed have high efficiency, are compact,
You can’t make one yourself, it’s difficult to repair, and it’s reliable. a
transformer (depending on how it’s made, of course) - and itself
you can do it tooit is easy to repair, and any power -
the main thing is to dig up a wet trans!                             
                                                        
ideal option - power supply from any pc-at.  the most
widespread - 200 watts. i.e. 20 amps at 5 volts and
8 to 12!  gigantic power!  yes plus myself
cools.  and stability of output voltages for any
so very high. don't care that it was made where - thread in
China.                                                  
                                                        
I've been using this one for two years now, I'm happy
very!   macros screams - with speck, pisish bp is not
heats up, turn off the fan so as not to
made noise.  that's how it is, but I wouldn't do it
became, because he ventilates everything besides himself bhytpehoctu
buildings in which the speck lives. and he is very pleased with it,
he told me.  especially to me this noise from the fan
I like it, and he, the fan, was my dream until he
I wasn't there...                                         
                                                        
also - if you don’t have a casewritten, for example, a
from a corvette, then the power supply most likely lives somewhere - the thread is under
the board of your spec or very close to it. he probably
pulsed, amps 2-3... anyway to protect
speck, you need to attach a fan to it from
fucking BP, so that he blows on this BP at least half-force
(connect through a wet clip).                          
                                                        
behtuk will cool both it and the Spectrum. everyone will
easy and cool and they will live for a long, long time...
Amen.                                                  
                                                        
and now I’ll tell you how easy and simple it is to make wet
stabilized power supply   simple trance block
build according to the scheme: step-down trans > diode bridge >
capacitor > everything. ale lowered > straightened the voltage
> smoothed out the pulsations.  but in the end we will also add to
him a stabilizer (even two!), so that they (voltages)
there were two and they were stable - prestable!       
                                                        
in total four nyhktuka in total 1.transformer. the most important detail. you can find it in
some kind of old device, for example on a TV
ancient.  We need it to have an output voltage
at least 15 volts, and no more than 30, twenty - at the most
once!  the thicker the wire on the secondary winding is -
the more moist it is, if it is two millimeters, then it’s finally
monster!  and with tpahcamu in which it is less than a millimeter -
Don’t mess around (little)!                                  
                                                        
tube TVs have TS180 or TS250 trans. how
It can be seen from the numbers that their power is not poor. secondary
They have a lot of windings, but the ones that suit us are the ones
connected to incandescent lamps (6.3V). current - almost whole
five amps! because the rest of the windings are not loaded -
then you can remove up to 10 (!) amps from them! maybe this one is trans
consists of two identical parts, then the windings of these
two.  connect them in series and you get the total
voltage is about 12.5 volts. few. cut it short. easier
just look for some other suitable wet thread
trans. but if you are a wild speckman, then briefly:         
                                                        
[tpahco theory - devices in ten lines]           
it has two windings - one primary (connects to the network
230v), the second is secondary, the finished product is removed from it
the voltage we need. there is a lot of wire in the primary one,
secondary - little (relatively). turns ratio in
the primary winding to the secondary is determined by the coefficient
transformation.   exampla: in primary - 1000, in
secondary - 500, which means if the input is 230, then the output
115 volts.  something like that in short.  Maybe. May be. I got a C in physics.                       
                                                        
so, if you want to increase the output voltage,
This means you need to add turns in the secondary and reduce
if - then on the contrary otmotatb are superfluous!  break your trance
a piece of paper, find wires of the appropriate diameter and go ahead!
make control measurements along the way, ten volts
Whenever it’s on each one, it’ll be just right! Well done. wrap it up
He is now carefully covered with electrical tape so that he is not cold. 
                                                        
2.diode bridge. these twenty volts, for example, are
AC voltage, i.e.which one has the polarity
changes at a certain speed (ale - frequency!). a
we need to make it permanent, i.e. where is the plus
and minus.  This is why everyone (including the Chinese) uses it
diode bridges.  these are four diodes connected by
a certain scheme.  I won’t draw her here - she’s all there
they know, ask anyone.                                 
                                                        
for greater convenience, many manufacturers have these four
diodes are often placed in one housing and a hole in it
they do it to attach it to the radiator - after all, the bridge is also
under heavy loads it heats up.  it's best this way
use it.  go to any store and ask for the bridge
"ten amps."                                      
                                                        
He has four legs, but he doesn’t walk on them. and not even
worth it.  each one is signed, plus and minus where it is drawn -
these are the outputs, and connect to the other two legs
twenty volts from trance.                                
                                                        
                                                        
3. capacitor. rectified voltage is full of ripples,
connect an oscilloscope and you will see. to smooth them out, nada
connect a capacitor in parallel (electrolytic)
decent capacity. Well, and a suitable voltage, of course.
better use some bourgeois thread, it’s better and
looks more beautiful.  By the way, they have a plus and a minus, not
mix it up, the minus is signed on the case. the more it is
capacity, the better. just right - 4700 microfarads / 25
volts and more is possible!                                
                                                        
4.stabilizer.  because we need to get two different
voltage from one source, then we need it
stabilizer - a device whose output, how much
do not apply volts to the input (within certain limits
of course) - its stabilization voltage will still be there!
quite a complex device.  but it is everywhere
We use ready-made stabilizer chips, for five
volt - 7805 (russian - kpeh5), and for twelve - 7812
(roll8). They only have three legs. Harotobo will do everything.    
                                                        
wherever they are used - all blockspower supply from zxCh8
performed on them. (?)                           
                                                        
the first leg is the entrance, the second is gnd and the third is the exit.
attached to the radiator.  the maximum current is either one,
maybe one and a half amperes.    not enough.   then you can
use it and some kind of power transistor in
as an output stage, let it be Georgian!  to
for example, kt837!  it can be loaded with current up to seven (!)
ampere  Well, he needs an appropriate radiator than
the more the better.                                     
                                                        
the first leg of the transient is the emitter, the second is the collector,
the third is the base.  connect the plus from the output to the emitter
bridge, the first leg 7805 - to the base, the second - to the minus
bridge, the third - to the collector and remove from it
stabilized +5 volts. hang another clip on the trans
between base and emitter, 50 ohm, any power.      
                                                        
make a similar cascade for 12 volts, only with 7812! 
                                                        
By the way, the transic on the collector has a plus, so
isolate it from the radiator if it itself is from everything
the rest is not isolated.                               
                                                        
place your power supply in some suitable box
sizes - or even make one yourself from plywood! write on it
"high power power supply" or something like that! formalize
In short, as you like.                               
                                                        
if, for example, you connect a scorpion to it +
5.25*2 + 3.5 then all this will consume no more than 4 amperes
5 volts and two twelve.  he will give it away without
special tension.                                        
                                                        
I left.