Could somebody please check this arduino circuit, I have a few questions about it.
So basically it’s a circuit to measure the voltage of the cells that much is clear; it uses a voltage divider to get an analog signal voltage in the range of the arduino (up to 5 volts) and then uses an algorithm to calculate the actual voltage of the cells.
So my questions are:
- If the voltage to be measured is that of the cells, the current passing through the resistors should be from the batteries. Then in that case what’s the point of connecting the breadboard to the 5V pin of the arduino and another connection from the ground pin to the breadboard. Aren’t these connections only done when the breadboard is powered by the arduino???
2)Instead of using battery holders with connectors is it possible to simply use pins (like those used in connections between the arduino and the breadboard) and place them at the poles of a 2 cell connection in series where the other ends of the pins would be in the breadboard.
Can such a thing also be done with a 9v battery such as this
I know my questions are very basic, I’m just starting to try to learn this stuff. Therefore all the help is highly appreciated.
Thank you all