Of course, measuring a voltage with the Arduino is old hat. But the addition of a INA219 current sensor provides voltage, current, and power measurements in a single module that talks I2C back to ...

I was looking for a different dc current sensor ... to use INA219 modules in a couple of small projects for certain reasons. So, I decided to make some pre-flight tests myself. You can follow the ...

The idea is simple enough: just place a INA219 current sensor between the power supply ... Of course in this case, [Mark] knew what the target Arduino Nano was doing because he wrote the code ...