More on mice.
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An article about the AY-MOUSE in the first
issue of our magazine has caused
a flood of letters to "mouse"
theme. We asked V.M.G. (VMG)
to answer the most common
reader questions (B).
H: Connects a Kempston mouse
through the connector Kempston Joyce
tick?
VMG: None. Between the two lips
ful nothing in common,
but the word Kempston.
H: Which mouse is better connected -
AY or Kempston?
VMG: Ideal - have
Both the mouse. To do this hous
sa mouse is better to display only
amplified signals from the optocouplers
(See diagram below). If you do not ho
chetsya especially the fool, then
I repeat: AYMOUSE - purely yk
rainsky standard, Kempston
Mouse - INTERNATIONAL (except for
exception "St. Petersburg" average
button).
H: We in the outback, there is only
two-button mouse, but in the description
SRI shell "Pink Floyd"
mentioned some kind of average
button ...
VMG: If there is no choice, then buy
those two-button. Can a Ute
solution to say, that of pain
majority of Kharkiv same
Kempston mouse. Therefore, the prog
rammisty interested in
wide dissemination of its
of software, certainly will not
use the middle button
for important, but more so nedub
isolated, functions.
H: Altered "branded" mouse
responds to the buttons, and changing
schat cursor does not want (Option
- The cursor "jerk").
VMG: Yes, some of us
Shah insufficient amplitude
output signal directly
respectively with optocouplers. One output
out - Amplifiers -
described in "ZX Power # 1, other
On the other - the use of micro
scheme TL 561-series - in
"ZX Format # 5." The third solution
of - apply 12V to the photodiode
hole - I can only recommend
to those who have the oscilloscope
Earl and his head on his shoulders. A
well, perhaps, will
decision sent to the reader
A. Shatokhin of g.Zelenodols
ka:
Here Schmitt trigger is made on a CMOS element covered by
positive feedback.
It is convenient that includes 4 561 LP2
such elements, the numbering of the inputs and outputs: 1,2 and
3 5,6 and 4; 8,9 and 10, 12.13 and 11. At the 7 th output file
an "earth," and the 14 th +5 V. If you still have got a
Mouse +12 V, not to pull
another wire, +5 V can be "manufactured" inside her body on the
resistor and zener or only KREN5A.
From jerking the mouse can be cured capacitors set
between "land" and outputs (sometimes included) Schmitt Trigger
(IC TL). Start with
0.1 uF.
I wish you every success, and yet
reminder that over the phone
consultation on the scheme does not give
(Take my parents!).
Kharkov can find me on
weekends on Kutuzov market
(M. Heroes of Labour), or on Tuesdays from 17 to 18 on the
"Spectrum coterie" (formerly Gala Bazaar near m.Sovetskaya).
Nonresident reply by mail, of course, only if the attached
envelope with name or with any useful thing.
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