The principle is simple: we are going to measure our battery capacity by measuring the voltage across the battery terminals. The big assumption here is that battery capacity is linearly correlated to ...

Before connecting a battery to the device and measuring its capacity, you can examine the circuit using a power supply. For this purpose, you should connect the P3 connector to the power supply.

Most, if not all Arduino's have a built-in 10-bit 0-5V ADC that will measure the voltage on a specified input pin and provide you with a 32-bit integer. Be aware that the value will always be in the ...

If the battery is not new and part of its energy has been consumed, we will light a yellow LED. Finally, if the battery is dead or does not supply enough voltage, we will light a red LED. We must be ...