References
Nil.
Application
Lithium Polymer Batteries (LiPO)
Arduino analogue read.
Pre Knowledge
Arduino IDE
C++
Github
Download the github using the link below and save it in your Arduino projects folder.
https://github.com/brisbaneroboticsclub/ReadLiPo
LiPo Batter smart lead Pinout
For this example we used a 3s LiPo battery.
| Cable | Colour | Name |
| 1 | Red | S3 |
| 2 | Black | S2 |
| 3 | Black | S1 |
| 4 | Black | GND |
Multimeter Testing
| Ground | Positive | Result |
| GND | S1 | 4.08V |
| GND | S2 | 8.16V |
| GND | S3 | 12.25V |
It appears that the voltage output is accumulative and does not reflect the voltage of each cell.
The Arduino analogue ports have a maximum input voltage of 5 volts.
We can only measure the voltage between GND and S1. We will not be able to measure the voltage of any other cells.
Connect the LiPo smart lead to the Arduino
| LiPo | Arduino |
| GND | GND |
| s1 | A0 |
The analogue signal reads the voltage and converts it to a value between 0 and 1023.
To convert the signal to volts, divide the analogue data by 1023 and multiply by 5 volts.
Connect the Arduino to your computer. Ensure you’re using the right COM port and board type and UPLOAD the code.
Open the serial monitor (Tools>Serial Monitor) to see the values.
Did it work for you?
If this didn’t work, please message us or raise an issue on our github.
