Hi.

The pcb gets 4.75V .

This goes into regulator of 3.6V , which is the VCC of ATMega328p .

To measure battery voltage, there is resistors divider from 4.75V , with 2 big resistors (±270k/850k).

The smaller resistor (±270k) goes into the **ADC 6** pin directly .

(Tried also with input capacitor 100nF to compensate the large resistance)

```
void loop()
{
delay(100);
int tgh=analogRead(6);
Serial.println(tgh,DEC);
```

To measure the input .

The actual input voltage seen on the pin(Fluke) is **1.2V** .

The reading i get in the software is **400** .

My calculation is that 1.2V/3.6V is 0.33(from 1024) that i should get , and so from 1024 its :

0.33*1024=**341** .

I get 400 . (which is like 1.4V not 1.2V).

I guess i calculate wrong ,or measure wrong.. ?