Technodrome 2 - circuit diagram of a universal read-write head position counter of a disk drive.

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 Anything can happen in our lives.
            If only I had money...
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                        VremechkO
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           ─── Technodrome 2 ───


 ─── Universal position counter
    read-write heads of the drive ───

┌─────────────────── ────────────────────┐
│ DEVELOPMENT MLSH COMPANY 1993  │
└─────────────────── ────────────────────┘


DIRC ┌─┐
<────┬┤&O┐
     ├┤ ││  DC HL
 │└─┘│  CT K514ID1 ALS324A
 K555│┌──┘  K555IE6  ┌───┐ ┌────┐
 LA3 ││┌─┐ ┌──┬──┐ │ a├13─14┤ │
     │└┤&O────5┤+1│ │ │ b├12─13┤▌▀▀▐│
     │┌┤ │┌───4┤-1│ 1├3─7┤1 s├11──8┤▌ ▐│
     ││└─┘│┌─11┤C │ 2├2─1┤2 d├10──7┤ ▀▀ │
STEP ││┌─┐││┌15┤D1│ 4├6─2┤4 e├9───6┤▌ ▐│
  ┌─┐└┼┤&O┘│├─1┤D2│ 8├7─6┤8 f├15──1┤▌▄▄▐│
<┬┤&O─┴┤ │ │├10┤D4│ │ │ g├14──2┤ │
 └┤ │ └─┘ │├─9┤D8│>9├12┐└───┘ └┬───┘
  └─┘│├14┤R │<0├13│ units ┴4.12
TR00  ┌──┘│ └──┴──┘ ││
<────┤├─┤ ┴┌─────────┘│
    150p│ │┌─────────┘
        │ │└+10 to the next
 │ └─-10 cascade (tens)
+5V 1K │  K555IE6
<────███┴────STHROW and then hundreds...
GND
<┐
 ┴

      The counter allows you to display the current
position of drive heads on magnetic
disks [disk drive] or "WINCHESTER" with the whole
yu visual observation of the progress of the process
sa reading/writing information.  Device
is a structurally complete unit.
The drive signals are connected to the corresponding
current inputs of the device. Reset signal
serves to eliminate software errors
KR1818VG93 microcircuits. (meaning for-
travel of the heads beyond the 80th track numbers and ascent
reverse rotation).  Chip K555LA3 is not
painted with the pinning of the legs, I hope that
Radio amateurs know it.
      It is possible to replace the indicator eight-
measurements ALS324A on ALS324B, but at the same time
K514ID1 changes to K514ID2, and in the circuit each
long cathode of the LED figure eight
Therefore, the 180 Ohm resistor is turned on.

      When a STEP signal is sent to the drive,
depending onDIRC signal level (from
center to center) a holo step is carried out
storage capacity and simultaneous support
converting this information into eight-bit in-
indicator signal TR00, issued by the accumulator
lem provides insurance against errors
reset [see above].


      For detailed information please contact
directly to the device developer
MALYSHEV SERGEY MIKHAILOVICH by phone:

             350-79-73 (in the evening!)

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