Visual FDD - Indicator for the disk drive.

 visUal fdd
                                        
                                        
many people probably know this thing,
as a disk drive read/write indicator.
these are two LEDs (or one two-color
ny), connected to the terminals of the VG-shki.    
                                        
Of the shortcomings of such an implementation, I would say:
divided, firstly, what was needed
attach a 2-pin connector to the board, and, firstly,
secondly, if instead of LEDs there are
error connect something else, then
you can bang the zero track at the first
accessing the drive.                  
                                        
Or you can embed the indicator directly into the dis-
leader for this you will need:           
                                        
 - two-color LED                
 - LE1 microcircuit of any series           
                                        
The indicator works as follows.
when accessing the disk drive, it lights up, just like
usually a green LED.  if you went
recording - red lights up and green -
goes out.                                 
                                        
It is better to use the 133rd se-
riy - a small one with flexible gold-plated
with their paws. green LED from dis-the driver is soldered off, and in its place is installed
two-color flows in, but to contact
do not solder to the pads of the old LED
is happening.  the microcircuit is soldered with one
foot to the LED, the rest is connected
There are wiring.                         
                                        




                                        
/W is the recording strobe. active at zero,
     taken from the 24th contact of the disk
     yes.                                
/m - the signal that was initially sent to
     LED.                         
                                        
the indicator can also be assembled on a transistor
rah - small ones, imported.