VERSION 1.00

+  .     .    
      .
+         
  5 ,   100 ,   20 ,  
   1700 .
+     (true peak)     0 ,
    100 ,   1000 ,  
   600 .
+   -     .

VERSION 1.01

+    .
+  .
+     .

VERSION 2.00

+    35 .     TSreg
      .     35
  .        EEPROM.
+   DAC,       .
  
VERSION 2.02

+    40 .     
     PC13,  .  
      35 ,   
  .
+    EEPROM,     EESave().
       .
        PC    .

VERSION 2.10

+    Meter50V4   Rev. 4  
  STM32F103C8T6.   I2C  TIM16  TIM4.  
  bright.cpp       DAC
   TIM15 PWM,     .

VERSION 2.20

+     .
+  STM32F100C8T6B  Aliexpress    
  STM32F103C8T6B.        .
     : Meter35F100, Meter40F100,
  Meter50F100, Meter50F103.     F103 (Device ID: 0410)
       .  
  F100 (Device ID: 0420)     .
+    .     
   USE_KEYBOARD.  2 : MODE ( 
   MODE1)  STAT (   MODE2).  MODE
     .     EEPROM.
    STAT   (  ),
      ST (TR8).    
     MODE.   STAT ,   
  .      ,  
    .
+      .
        USE_LEDS_MUX.   
    10  (    ) 
      5     .
       0.    
         0,  ,
            .
    ,       
     1.
    :
  IN1 = 1 - MUTE (TR9)
  IN2 = 1 - SRCL (TR7), = 0 - TAPEL (TR8)
  IN3 = 1 - SRCR (TR7), = 0 - TAPER (TR8)
  IN4 = 0 - REC (TR6)
  IN5 = 1 - NR (TR5)
  IN6 = 0 - CYCLE (TR4)
  IN7 = 1 - AUTO REVERSE (TR3)
  IN8 = 0 - 9 (TR0), = 1 - 19 (TR1) 
?         10?

+     Aliexpress    
  ST-Link.   : Target->Settings->Connection Mode->
  Connect Under Reset.  NRST   ( C24),  Connect,
      NRST.   .  
     .   : Target->Option Bytes->
  Read Out Protection->Disabled   Apply.

+   74HC595  Aliexpress     
  12 ,   #define SPI_DIV 1 //SPI clock divider (0 = APB2/2,
  1 = APB2/4 ... 7 = APB2/256)   .   6  .

VERSION 2.30

+  STM32F100C8T6B  Aliexpress    
    HSI.     
  #define CLOCK_MCO,  24      29 (PA8).
    HSI  20.422 ,   HSI TRIM  
    21.807 .        8 .
       #define CLOCK_HSI 
  #define CLOCK_HSE.       
     .
+  STM32F100C8T6B  Aliexpress   
    .  ,    ,
     IN_FLOAT,     
  10k/20k   1 .
