Iron - device extended keyboard (58 keys).

<b>Iron</b> - device extended keyboard (58 keys).

          Keyboard

   Appearance of enhanced keyboard (58
keys) without housing. Consider it your device.



   The keyboard is placed on a metal base - a sheet of colored 
metal special formy.Po edges are projections - ears, fixation 
of the shell at the top projections - the site for the film clip

contacts. At each site with 2 holes
fixing, at the very basis of several
mounting holes, and one, maybe
2 for fixing the keyboard and films.

   Based on the fit of the film. This is somewhat
layers of films fused together in some places on the edge 
(figure sketched my keyboard, whose films are fused

at right), not to rassovmeschalis
between them. I believe this is the kind of
keyboards, which advertised in different
magazines, even in the 80 years, sent out kits
mail. Promising to 200,000 (!) Clicks with no signs of wear, 
now I do not doubt it! I did not count, but it appears that the 
four films deposited metal tracks and

area under the keys, and another two films are separated 
between the clickable films - contacts, and they have holes 
opposite sites klavish.Chetyre layer (instead of two) are used 
for hardware implementation of additional keys, pressing which 
is formed by double-clicking - closes the top two layers, and 
then lower. Of course, the main keyboard are closed

only two layers (the others are no paths
and pads - no need to). Since the different
layers are the same signals (for double keys), they must be 
interconnected. This is done on the ledges of the films in the 
top, where they form large contact areas, the left data, right 
adresov.V to these places some of the film cut off and the 
remaining (I think two) lie on each other, closing the adjacent 
layers (Contact pairs of the same name rocker), for which the 
film in these places must good cuddle. For this purpose, and 
made protrusions in the metal base on which

posted ploschadki.Na contact them superimposed metal 
rectangles, and with two screws (if they sliced

thread, or even with two nuts) is pressed against the film, but 
not directly. 

   Under each rectangle of thin layer
black gum (or a white circle of rubber, the size of covering 
all lines of contact). Each pair of pressed films in favor of

basis and stretches to the size of the height of foundations
or even more (not took it for), forming two
film loop contacts (addresses and data). One of the films of 
the net, probably for strength and protection of the second, 
which are kontakty.Pri they are covered with an insulating 
layer of blue tsveta.V end loops Contacts expand (as well as 
some y pads basis) and free

izolyatsii.Zdes relies on them to insert,
pressed into the slot that
practice is rough and messy ...

   In the films to make a hole for attaching a keyboard, and a 
pair of large holes for the fixing of the keyboard and films. 
Since the film priplavleny places, they can be widely divided 
(to rub with a dry cloth, preferably without leaving excess of 
particles, removing accidentally caught artifacts), but it is 
unlikely necessary, due to tightness sloev.Plenki (in open 
spaces) oxidize and fear aggression (including adhesive) 
materials, but by themselves are not completely spoiled. In 
view of the subtleties of coverage is not cleaned 
rekomenduetsya.Luchshe once well and gently squeeze as much as 
possible to a large surface area contacts. On soldering, 
heating did not Think ...


   Keyboard itself consists of a plastic mask, which are 
inserted into the plastic keys. Pre-mask-wearing springs, which 
throw the keys Pressed in polozhenie.V each key is inserted a 
small spring, which presses the film by pressing a button. Four 
large buttons are rocker, eliminating the bias in the press. 

   The mask is molded of special shape. Total
rectangular, it has a cylindrical protrusions on the top - 
storone.Po outer ledge of a button. The tabs and put on large, 
but soft, black springs (there are different lengths and 
therefore the rigidity, but in general impression of the press 
does not spoil), cast and hold in the initial position. In 
addition, press rests on the ledge, which limits its

course at the end of the back side of the mask nazhatiya.S made 
a lot of holes, and there space within the mask defined by its

tall (not counting the height of the projections). openings in 
the projections used to progress key and clicking on each key 
plenki.Dlya There are two rectangular mounting holes

and one round hole fiksatsii.Dlya major keys have extra holes
for fastening and fixing. Fragments of the keys
when you move in the holes within the height of the mask, but 
the films do not touch (Restricted projection).


   On the reverse side of the mask in front of four large keys 
(2 CS, EN, SP), melted a pair of legs. They inserted rocker. 
Rocker is made of a thin stiff wire, bent in the shape of a 
broad, low capital P with curved edges. 3 is approximately 
equal, one thick and larger for press SPACE. Its edges rocker 
is put into a special slot latches keys (keys at the same time 
must be inserted with a repulsive spring and should be be in 
the damper position to Slotted clamps were on the back

by mask) and then inserted into the yoke with a click of its 
long side (the tip of the capital P) in the molten feet maski.V 
legs rocker mask can be freely (With a little friction) to 
turn. When Clicking on the edge of a major key, it is slightly

leaning in this direction, its latch clicks on the edge of the 
beam, it turns pushing the other with its edge on the other 
lock - on the other end of the same key, utyagivaya behind him. 
Thus, long keys are pressed almost without bias, not stuck. 
Although there may be problems if beam is bent, or the key is 
bad cast, or worn, but still pressed for more than a convenient 
(though not at the edge). 

   To remove the rocker, you can press
key so that the visible edge
rocker on the back of the mask, and
This screwdriver to press the long part of the beam to exit 
from his feet mask. On the reverse side of the mask on the 
perimeter is made ledge, which lies on the mask film.


   Also on the square mask made several oblique projections. 
All of them are quite thick, and the mask presses them plenki.V 
overhangs mask the back of the metal base, screwed 8 screws. So 
as the mask is firmly against films, and they are to the base, 
while the film stretched over the entire surface, providing a 
reliable gap between the layers with kontaktami.Esli some group 
will still be closed, it is necessary to determine its (impact 
on button significantly alter the contact resistance), and 
releasing a few screws, pull, smooth film in this location, 
then pull shurupy.Ne tighten the screws much as they can cut 
plastic maski.Togda this place should fill simple (paper, for 
example), glue, carefully screw the screw and wait for drying. 
You can also fill the hole with wood chips matches and 
carefully screw the shurup.Na the reverse side of the mask, on 
ledges have a pair of pins (at least one), which

pass through the holes in the films and are
a metal base for proper fixation throughout konstruktsii.Yamku 
this pin can be seen in the figure above the numeric keypad. 

   Each key is cast from a more rigid
(Less elastic) plastic than a mask. From
top - front - side down departs
hollow cylinders, inside which there is a subtle shtyr.Na this 
pin is worn (possibly circumferential, surfaced or glued) a 
little stiff black (there are also white) spring, is able to 
compress times 1.5. Unnecessarily do not try to

rent, sometimes it stretches them, and wear
to hold on, hold on neprosto.Pruzhinki
very reliable, I have not had occasion to
flew.

   Also down from the edges of two key depart
mounting pin, ending a triangular rim (like arrows). During the 
assembly, when worn down to the ledge, these pins are inserted 
- latched into the mounting holes and a side does not allow 
button fly off the ledge, restricting the position of the keys 
pressed. 

   To remove the key, click on the bumpers on the back of the 
mask a thin screwdriver, but press gently and at the same time, 
but first remove the beam from this key, if it has. If the key 
very tight shot, then worn too will be tight. Must wear neat, 
evenly pressing the whole key, pushing the pins at the mounting 
holes. Key worn with a click (no more springs

forgot to wear?). If this feeling
a lot of effort, it is better not wear down,
but first erode its bumpers pins Needle file or a sharp knife. 
Next to the pins attachment on a key priplavlen round

cone-shaped pin fixation (stick).
During the assembly, he enters into their round hole. When you 
press the mounting pins away from the mask and move freely in 
their square holes (to not to interfere with depression), and 
pin fixation of slides in his hole, not allowing the key to 
turn, and hurt its square edges of adjacent keys. This pin 
really should slide into the hole - ie touch the mask. But if 
you have the key stuck at the end of the (male - cone, thicker 
at the top of the key), then this defect, and should sharpen up 
a little pin at the base. 

   All digital, letter, sign and arrow keys from the white 
plastic (some yellowish - technologically) color. Other keys 
are gray, but the key BREAK is krasnoy.Na keys printed in black 
symbols, and there is a protective coating. But whether 
coverage is not always uniform, then the technology is such 
inscriptions over time (usually very large) are erased from the 
front - Pressure - side. Interestingly, the survivors are 
forced to label not easy to erase, just erase.


   From his experience, I can say that the keyboard is neatly 
connected and enclosed in a case, works perfectly (at least 3.5 
MHz). Of course, if it was well-built, or gently brought to

uma.Eto only convenient and triggered soft keyboard, on which 
nothing gets stuck and does not break a very long time - 
literally years, until zasoritsya.Esli you have a problem with 
it, then probably you no luck with the build, connect, and 
themselves you can not fix it (the classical

laziness or lack of time, patience or
information - for example, this file). Enough to analyze this 
device keyboard, to understand its advantages.


   Sturdy metal base, which
can be used as a screen! Which is not
break even if stepped on klavu.Germetichno protected contact, 
in fact, free from iznosa.Dempfiruyuschee - through the spring 
- a soft push, not damaging the film. Advanced dropping spring 
guaranteeing the opening (as in pushed out situation of small 
springs are hanging over films without touching them). No wear

films t.k.priraschenie elongation of the film at
Pressing equal to the thickness of the film and the insulating
negligible in front of the area - a radius of
pad keys. Reliability and
resistance to shock loads (you
guess, to what can bring professional stiffness, difficulty and 
obstruction of games on the Speccy). When you hit the keys are 
based on projections mask that their projections distributed 
over clicks film t.k.osnova metallic solid, no

bends, Do not tilt, the pressure on the film we obtain the 
distribution and relatively small - it is checked repeatedly. 

   The disadvantages are primarily the sensitivity of film 
contacts mechanical (scraping) and chemical

(Sticky side of the blue tape) influences. T.e.trebuetsya 
careful, accurate connection film loops. The disadvantage

is the increased capacity of the film keyboard (due to 
deposition of films and wide lanes), although with the right 
interface, everything works without problems. In TURBO, maybe 
something will manifest, but literate circuit design and the 
way this can be circumvented. You can call the lack of 
complexity of the keyboard, but it is more true to say about 
the uneasy device in front of some other types of

keyboards. Is the keyboard of this type
more demanding on the quality of the process
production than any other punching, and if all
respected technology (which does not always have
our case) in a keypad
disappointed.

   The figure I cut edge (not climbed)
and did not paint film loops by simply
signed numbered conclusions. It is almost perfectly 
proportional to the type of my keyboard without korpusa.Vidna 
frame mask around a set of keys within a few points - the holes 
on the mounting screws (with reverse side). Also facet of the 
fixing pin - on digital klavishami.Maska with the keys is on 
the films - they stand out from the masks, some covering a 
metal base. At the edges of the film seen some unused holes and 
places priplavleniya films - pryamougolniki.Vverhu on the pads, 
metal rectangles that touches the film, and the points

- Mounting screws. From a rectangle
out plumes of films through which rayed edge metal framework. On
actually contacts the base mounting
slightly wider, but it failed to show and
right now my cable is not sticking Claudia, only slightly 
raised petals foil. Which are soldered to the board, fixed with 
rectangles keyboard. K boards have soldered wires.


   A metal base to be drilled two holes in the middle (height)
5 mm from the edge, and using them to strengthen
keyboard to the appropriate body (which is also drilled holes). 
The figure shows holes - tochki.A ears keyboard (below the top 
corners of the base) used for fixation in the body in the 
correct position (under the ears cut out place). 


                     By KSA-7G 25.12.2003