Iron - On AY-mouse (FAQ).

More on mice.
________________________________


   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. 
________________________________