Measure voltage supplied to motor on G2 18v18 motor driver for arduino

Support Motor controllers/drivers and motors
1

Hello,

I’m working on a project where I am using the Pololu Dual G2 High-Power Motor Driver 18v18 Shield with an Arduino Mega. This project requires that I be able to approximate the voltage applied to the motor. Is there a simple way to measure this without additional circuitry?

Thanks,
Jamey

2

I think I was able to solve this. My plan is to just take a baseline measurement from my power supply and multiply that reading by the percent of duty cycle being utilized.

I took some measurements with my handy dandy multi-meter and it seems like this should be close enough for what I am using it for.

Thanks,
Jamey

3

Hello, Jamey.

That approach sounds good; I was about to suggest the same thing.

By the way, you might also be interested in the current sensing capability of that board. You can find more information about that on the product page and in the user’s guide, which is available under the “Resources” tab.

- Patrick