Ultrasonic sensor on a Kitronik motor driver board

1

G’day,

I am trying to make an obstacle avoiding robot using an R-Pi Pico, a Kitronik Motor Driver Board for the Pico, and an HC-SR04 ultrasonic sensor. When its powered by a USB connected to my computer, the HC-SR04 works fine and returns a distance. However; when its powered from a battery it does not. I used a multimeter and confirmed there’s voltage to it when its powered by the battery, the same voltage as when its powered by the USB. Any ideas why it might not be working?

2

Hi @James292715

That is definitely odd behaviour from your setup, are you able to give us some more info about the type of battery it is that you’re using and how you have it connected to the Pico?

3

Hi Dan,

Ive tried several batteries from alkaline, to lipo to 9v. All plugged into the screw terminals of the kitronik board. The pico itself is just inserted into the board.