Good morning. I am creating a robot with steering controlled by a servo motor that uses the PM-R3 shield as a motor driver and is remotely controlled via a PS2 wireless controller. I noticed that when Arduino is connected via USB, loading the test sketch available at https://www.instructables.com/Ho…

Different behavior of the sketch if Arduino is powered by battery

b707 June 30, 2025, 10:01am 2

Which Arduino?

What is voltage you used on Vin pin?