Batt meter

Projects Programming
77

@HazardsMind,
I am running this code right now and measuring voltage and getting the print outs:

  int temp;
void setup()
{
    Serial.begin(9600);
}
 void loop()
 {
  
   temp=getBandgap();  // <=========== YOU CAN LEAVE THESE OR DELETE THEM . These statement are just a test.
   Serial.println(temp);  //<============
   delay(5000);               // <============
 }
 
   int getBandgap(void) // Returns actual value of Vcc (x 100) 415 = 4.15v
{
   int raw = analogRead(0); // <========= NJ9A ==== CHANGE THIS TO A15 !
   int results = map(raw,0,1096,0,500);  // scale voltage to 0-500
   float myfloat;
   float sensorCalbrate = 1.095845;
   int battv=results;
   int temp=battv;
   int x;
   int y;
   float z;
   float batteryV;
   x = battv;
   y = 100.00;   
   // y now contains 0, ints can't hold fractions
   z = (float)x / y;   // z now contains .5 (you have to use 2.0, not 2)
   batteryV=z*sensorCalbrate;
   Serial.println(z,4);
    Serial.println(batteryV,4);
    temp = (batteryV*100);
    battv== (int) temp ; // now i is 3
   Serial.println(temp);
   battv=temp;
   results=temp; 
  return results;
 }

I admit this doesn't make any sense but I didn't change it because it doesn't effect anything.

 int battv=results;
   int temp=battv;

BATTV.txt (138 Bytes)