Arduino battery voltage monitor

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User <---> Android smartphone <---> Arduino + Bluetooth shield + Voltage divider resistors

I created an Arduino project to monitor the battery voltage via Arduino Nano +
bluetooth module and Android smartphone with Arduino Bluetooth Terminal application.
I used 2 resistors R1 = 33K and R2 = 8.2K as voltage divider for battery 12 Volt.

Arduino + Bluetooth module HC-07

Voltage divider resistors

Arduino code for battery , voltage monitor

You can download the Arduino code from Power Net Apps.

In the first index page of this website you can find to download the Arduino Bluetooth Terminal Android application.