Battery voltage read
hi have 2 problems battery voltage indicator
int sensorvalue = analogread(a2);
float voltage = sensorvalue * (5.00 / 1023.00);
1.voltage value incorrect how tweak it?
2.if battery voltage goes down voltage value increase how fix it?
sorry english
int sensorvalue = analogread(a2);
float voltage = sensorvalue * (5.00 / 1023.00);
1.voltage value incorrect how tweak it?
2.if battery voltage goes down voltage value increase how fix it?
sorry english

quote
2.if battery voltage goes down voltage value increase how fix it?use 1.1 v internal reference.
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