FC-510mk2 history:

Version 5.0 (FC-510 mkII)

+    FC-510.  ATmega168,  1602 (LCD  OLED).

+  OLED     .

!  OLED-     :  
      200   
  23 .      
 13.7 ,      WS0010 
.    SPN3402W ( S42W), 
330 .
+        
  OLED    .  
     5  12 ,   
 .      
 10 .     ,  
   .   .
       +5   -5   .
        50 mV p-p, 
       100    ESR.

+         ,
      19 ,   
 .    ,      1.5 .
         
,      1.5 .

+       , 
         .

+      2-   
3.96 ,     (  3-
   ).     
   1 .     .

+   LM337  KIA7905   .
   ,     
 .

+       2- 
  2       OLED.

+ OLED-     ,  LCD. 
   470    E   .

+       "GATE"  
   10 .     .

+      Menu.c   Mnu_Setup() 
  Count_StartCalib()     
.    ,    .

+         
    .    
   .     VT3: R7 = 330,
R8 = 100.    VT3 c 2.74    2.59 ,
  -  3.5   3.36 .  ,   
  ,      4.6 .

+     BF862   2SK246-GR. 
   U1  -1.56 ,     .

+      1024.  
   1  UP + DN.

+    CHAN_AB    .
     MODE2,   CPLD.
     (   
 ).     CPLD 2.1  .  
   CPLD   MODE2 = 1, 
  B      .
    B  FDIV      
 1.    ,    
   ,       
.    A  FDIV     
.        
 ,     
 1   FDIV.     , 
  ,       .
       : A  B ( 
   FDIV,   ,  B).

+    .    10,  
   "+"  "-".

+   :  ADC6 -  B (,  3 XP7),
ADC7 -  A (,  2 XP7).    .

+    ATmega168  1.1 ,    
     .    
  AVCC (5 ).     ,
  MAX_VIN.  MAX_VIN = 1100    
    5   .

+     "GATE"   
.       ,
  2       (  
).   ST_CALIB1 (pre-calibration)  ST_CALIB2
(post-calibration).  pre-calibration   
 PreCal,   Cal   .   
     1/2  ,   
     .

?      1 ?

-    AD8307?
   .    0 dBm,
     .   
  -   .

-    (    
 ,       ).

-         GPSDO.

-    EPM3064  Quartus.
