A drop of solder - diagram of a digital track indicator for the Disk Drive.

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(C) ZSV Soft/ MENTAL INSPIRATION UNITY/
 CONSTELLATION.
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            ┌─────────────┐
            │SPR_1 (32x11)│
            └─────────────┘

              Howdy brothers!

   So, the bazaar will be about digital indicators.
re tracks FDD. Somehow I got there a long time ago
I have this weight of an unknown car in my hands.
ra, and so that the good would not be wasted, I decided
write about this whole thing. The scheme was German
The board has been significantly changed, supplemented, and separated
etc. Actually, for an ordinary user this is a fish
rather useless(?), but progressive
I think it will be useful for the writing fraternity.
People, judge for yourself, it’s just convenient
but, know what road you are on at the moment
there are heads of drive. I won't hurt you too much
download, catch the diagram:


 K555LA3 K555IE6 KR514ID2 HG1
DIRC 1┌───┐ D1 D2 D4 ┌───────┐
<──┬────┤ & o─┐ ┌──┬──┬──┐ ┌─┬──┬─┐ R1* │ ▒▒▒▒▒ │
   ├────┤   │3│┌───────5/+1│СТ│ 1├3───5┤1│DC│A├11──═══─┤▒  A  ▒│
   │   2└───┘ ││┌──────4/-1│10│ 2├2───1┤2│  │B├10──═══─┤▒F   B▒│
   │ ┌────────┘││ ┌───11oC │  │ 4├6───2┤4│  │C├9───═══─┤▒     ▒│
   │ │ 4┌───┐  ││ │ ┌─15┤D1│  │ 8├7───4┤8│  │D├8───═══─┤ ▒▒▒▒▒ │
   │ └──┤ & o──┘│ │ ├──1┤D2│  │  │     │ │  │E├7───═══─┤▒  G  ▒│
 ┌──────┤   │6  │ │ ├─10┤D4│  │  │12   │ │  │F├13──═══─┤▒E   C▒│
 │ │   5└───┘   │ │ ├──9┤D8│  │>9o───┐ │ │  │G├12──═══─┤▒  D  ▒│
 │ │   9┌───┐   │ │ ├─14┤R │  │<0o──┐│ └─┴──┴─┘    R7* │ ▒▒▒▒▒ │
 │ └────┤ & o───┘ │ └┐  └──┴──┴──┘13││                 └──┬────┘
 └───┬──┤   │8    │ ─┴─             ││         -единицы-  └─>+5v
     │10└───┘     │ ┌───────────────┘│
     └─────────┐  │ │┌───────────────┘         -десятки-  HG2
STEP  12┌───┐  │  │ ││      D3            D5           ┌───────┐
<────┬──┤ & o──┘  │ ││  ┌──┬──┬──┐     ┌─┬──┬─┐    R8* │ ▒▒▒▒▒ │
     └──┤   │11   │ │└─5/+1│СТ│ 1├3───5┤1│DC│A├11──═══─┤▒  A  ▒│
TR00  13└───┘     │ └──4/-1│10│ 2├2───1┤2│  │B├10──═══─┤▒F   B▒│
<─────────────┤├──┴───11oC │  │ 4├6───2┤4│  │C├9───═══─┤▒     ▒│
             C1     ┌─15┤D1│  │ 8├7───4┤8│  │D├8───═══─┤ ▒▒▒▒▒ │
                    ├──1┤D2│  │  │     │ │  │E├7───═══─┤▒  G  ▒│
                    ├─10┤D4│  │  │     │ │  │F├13──═══─┤▒E   C▒│
                    ├──9┤D8│  │  │     │ │  │G├12──═══─┤▒  D  ▒│
                    ├─14┤R │  │  │     └─┴──┴─┘    R14*│ ▒▒▒▒▒ │
                    │   └──┴──┴──┘                     └──┬────┘
                   ─┴─└─>+5v


  As you can see, nothing complicated, everything is simple.
  So, some explanations for the diagram:

D1 - K555LA3, C1 - 100-150 pF,
D2, D3 - K555IE6, R1-R14 - 360 Ohm,
D4, D5 - KR514ID2, HG1, HG2 - see below.


Food:
K555LA3: 7-GND, 14-+5v.
K555IE6: 8-GND, 16-+5v.
KR514ID2: 6-GND, 14-+5v.

   As indicators HG1, HG2  you can
use almost any suitable light
diode sign indicators WITH COMMON ANODE
(that is, so that the general indicator is supplied
moose +5v.). Well, for example:ALS324B; ALS321B;
ALS312A,B; AL305A... and others like that.



           ┌────────────┐
           │SPR_2 (32x8)│
           └────────────┘

   If anyone has SPECCY in their pee box like
Minitower, then you can use it for these
targets the foreign indicator available there
(well, the one that usually shows
frequency of the stone), if, of course, it is with a common
anode. I have,by the way, that's what it was done on.

   You may also have to select
summary R1-R14 depending on the used
indicators. Well, like, not too dim-
they were glowing (otherwise it wouldn’t be fun) and didn’t
very bright (otherwise they will heat up like an iron and
the fins will stick together).

   Signals:DIRC (direction), STEP (step),
TR00 (transition to zero track) are taken from
disk drive connector of your car (computer)
Tera, I mean :-)).
DIRC - 18 ──────> to contacts
STEP - 20 ──────> disk drive
TR00 - 26 ──────> connector.

   The upper digit of the indicator according to the diagram is
shows units, the lower one - tens two-digit
a large number of tracks.

 Printed circuit board layout:
──────────────────────────
 For particularly advanced harders:
   Listen to people if you can't stand it
Speckykilometers of noodles from MGTF and, in general,
you like everything to be in a bunch and not upright,
then here is the PCB layout for you
This FDD track indicator:



            ┌─────────────┐
            │SPR_3 (32x24)│
            └─────────────┘

   A couple of explanations about the board:
   On the left in the figure is a view from the microphone side.
roschem; on the right - bottom view. As a fee once
drive and poison, I think you know. Pla-
that double-sided fiberglass with
dimensions 75x40 mm. Conclusions of soldering parts
build on both sides, and in the transition points
holes, insert pieces of wire,
bend and solder in the same way on both sides
ron (if it is not possible to make metal
lization of holes). Resistors R1-R14 installed
renovated standing. Five-core cable from the computer
tera to the board, do it preferably as possible
in short; sixteen-wire cable from the board
to the indicator - you can make it longer
(within reasonable limits, of course :-)).

══════════════ ════════════════════════════

 So, now about possible replacements:
──────────────────────────────────
 If there are no indicators with a common
anode, indicators can also be used with
common cathode. MikruhiKR514ID2 (D4 and D5)
in this case, replace with KR514ID1.
 The connection diagram remains almost the same:

 KR514ID1 HG1 (HG2)
 D4 (D5) ┌───────┐
 ┌─┬──┬─┐ │ ▒▒▒▒▒ │
 3<─────5┤1│DC│A├11──────┤▒ A ▒│
 To counter 2<─────1┤2│ │B├10──────┤▒F B▒│
 D2 (D3).  6<─────2┤4│ │C├9───────┤▒ ▒│
 7<─────4┤8│ │D├8───────┤ ▒▒▒▒▒ │
 │ │ │E├7───────┤▒ G ▒│
 │ │ │F├13──────┤▒E C▒│
 │ │ │G├12──────┤▒ D ▒│
└─┴──┴─┘ │ ▒▒▒▒▒ │
 └──┬────┘
 └──┐
 GND ─┴─
Power:
KR514ID1: 6-GND, 14-+5v.

   Resistors between decoder outputs
D4, D5 and set indicator inputs already
no need. On the "general" indicators HG1 and HG2
give the ground. The rest of the circuit without
changes.
   As indicators HG1 and HG2 in this
In this case, almost any LED will do.
sign indicators WITH COMMON CATHODE (well,
such as those that have a common ground supply
la). For example: ALS314A; ALS339A, AL304V,
ALS324A... etc.
   If you make the payment that I bring-
above, then there is nothing to change there
just necessaryinstead of resistors put
jumpers and instead of +5v. give the land to
indicators.

.................................................

   Well, a more severe case: If you have
no mikrukh were found
can be replaced by K514ID2 and K514ID1, corresponding
responsibly.
The switching schemes in this case will be as follows:

   For K514ID2 and indicators with a common anno-
house:

 K514ID2 HG1 (HG2)
 D4 (D5) R1- ┌───────┐
 ┌─┬──┬─┐ R7* │ ▒▒▒▒▒ │
 3<─────7┤1│DC│A├13──═══─┤▒ A ▒│
 To counter 2<─────1┤2│ │B├12──═══─┤▒F B▒│
 D2 (D3).  6<─────2┤4│ │C├11──═══─┤▒ ▒│
 7<─────6┤8││D├10──═══─┤ ▒▒▒▒▒ │
                          │ │  │E├9───═══─┤▒  G  ▒│
                          │ │  │F├15──═══─┤▒E   C▒│
                          │ │  │G├14──═══─┤▒  D  ▒│
                          └─┴──┴─┘        │ ▒▒▒▒▒ │
                                          └──┬────┘
                                             └─>+5v.
Питание:
К514ИД2: 8-GND, 16-+5v.

   Резисторы, как и в первой базовой  схе-
ме - 360 Ом. Остальная часть схемы без из-
менений.

   Для К514ИД1 и индикаторами с общим  ка-
тодом:

                          К514ИД1         HG1 (HG2)
                          D4 (D5)         ┌───────┐
                          ┌─┬──┬─┐        │ ▒▒▒▒▒ │
                  3<─────7┤1│DC│A├13──────┤▒  A  ▒│
       К счетчику 2<─────1┤2│  │B├12──────┤▒F   B▒│
        D2 (D3).  6<─────2┤4│  │C├11──────┤▒     ▒│
                  7<─────6┤8│  │D├10──────┤ ▒▒▒▒▒ │
                          │ │  │E├9───────┤▒  G  ▒│
                          │ │  │F├15──────┤▒E   C▒│
                          │ │  │G├14──────┤▒  D  ▒│
                          └─┴──┴─┘        │ ▒▒▒▒▒ │
                                          └──┬────┘
                                             └──┐
                                           GND ─┴─
Питание:
К514ИД1: 8-GND, 16-+5v.

Остальная часть схемы без изменений.

 Ну вот и усе, пипл. Буду  рад, если  тебе
сия фишка пригодится. У меня наSkorpe it is
the business has been working for a long time.

────────────── ────────────────────────────

 Finally, for completeness, here’s one cartoon:
 Disc writing indicator:

 //
HL1
 │/│ ┌─────┐
 WRG<────┤ ├───┤ R1 ├───────>+5v.
 ││ └─────┘

R1  - 470-510 Ohm.
HL1 - AL307 (or any other small one).

 The signal WRG is taken from the 24th contact of the dis-
computer cable connector.

   When recording to a disc, the LED will
the village winks (if not, grab a beer-
ka - it will help ;-)).

   Well, having assembled the track indicator and this
cartoon, you will know exactly which one
the drive path is being written down for you by something
or another program :-)

   For this I say goodbye. If you have any questions, write.
Editorial address DEJA VU.


                         С верой в будущее
                            ZSV/MIU/CTL.
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