GOT IT !! how to read 12 or more volts with ads1115 16 bit adc

i posted question other day how read 15 volts ads1115 16 bit adc

well figured out
these guy great , tried wasn't getting worked , worked
until got !!
must have digital multi meter !!!

1. connect max voltage 100k precision pot adjust pot down adc allowable voltage remember voltage

2. divide max battery voltage result adc input voltage take result reading multiply result
of max battery voltage result adc input voltage..and bingo !! correct result

i using 20x4 i2c lcd  atmega328p

code: [select]



#include <math.h>
#include <wire.h>
#include <adafruit_ads1015.h>
#include <liquidcrystal_i2c.h>
liquidcrystal_i2c lcd(0x3f,20,4);
adafruit_ads1115 ads(0x48);
float voltage2 = 0.0;
float voltage = 0.0;
int outputpin= 0;

void setup(void)
{
 
  lcd.backlight();
  lcd.init(); // initialize lcd
  lcd.init();
  pinmode(8,output);
  pinmode(7,output);
 
  ads.begin();
}

void loop(void)
{
 
  float adc0;  // read adc, have sixteen bit integer result
  //float adc1;
  adc0 = ads.readadc_singleended(0);
  voltage = (adc0 * 0.1875)/1000;

 

  lcd.setcursor(0,1);
 voltage=voltage*1.688;
  lcd.print("voltage: ");
  lcd.print(voltage,4); 
 
  delay(500);
}




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