There is some non-linearity in the results, but for the purposes of measuring battery power in a system or deciding when to send a “low battery” signal, it’s an attractive solution.

Battery Input: 0-5V(max) – no reverse polarity Constant Current Load: 37mA to 540mA(max) – 16 Steps – can be modified by the user Circuit Analysis. Figure 1 shows the schematic diagram of the device.

The circuit diagram of the Arduino-controlled 12V automatic battery charger is shown in Fig. 1. It is built around Arduino Uno (Board1), adjustable voltage regulator LM338 (IC1), 12V voltage regulator ...

There is some non-linearity in the results, but for the purposes of measuring battery power in a system or deciding when to send a “low battery” signal, it’s an attractive solution.

Note: When you are using this method to measure the internal resistance of the battery using Arduino, ... The signal gets filtered out by a 100nF capacitor and a 100K resistor and the filtered DC ...

If you want a portable Arduino based project, you need a battery for power supply. 9V PP3 is a popular battery and easily available in nearby general stores. So, we are going to make a DIY 9V battery ...

To measure a 9V battery’s voltage, an Arduino Uno was setup along with a sense voltage where the current leaving the battery through a 10 Ohm sense resistor is monitored. A current sink that came from ...

Battery Cell Balancer with Arduino This project inputs analog signal from analog pins and outputs digital high or low from digital pins. If it is taking analog signal from analog pin 0, sends digital ...

As soon as we enter this state the PWM signal is set to 30%, to allow the solar panel to either charge the battery in a slower rate or keep it fully charged at all times. Note that, in both charging ...

What do you do if even the smallest Arduino boards (or their clones) are too big for your homebrew project? If you're Johan Kanflo, you find a way to make them even smaller. His AAduino project ...