Digispark as MULTIMETER

[jaghvi]

Received 2  Digispark yesterday . How about DS as multimeter ? Anyone who has implemented it ?

[semicolo]

I did a quick voltage logger to eeprom some time ago, it should be fairly easy to display a voltage on a LCD screen.

[digistump]

This should be very simple - and quite useful - for the voltage reading just


int reading = analogRead(PinNumber);
double result = doubleMap(reading,0,1024,0,5);


with this function to do the doubleMap since the map function is just for integers



double doubleMap(double x, double in_min, double in_max, double out_min, double out_max)
{
  return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
}