My Romi is connected to a Pi 4 and otherwise unmodified. I was attempting to do some computer vision with an arducam ov9281 connected via USB to the pi, everything powered through NiMH batteries. I found that as soon as I start trying to see frames from the camera, the Pi would crash due to undervoltage. What can I do to prevent this?
The Raspberry Pi 4 spec recommends a 3 A supply (15 W), with a minimum current of 2.5 A if downstream USB peripherals consume less than 500 mA in total.
Check the maximum current draw of the camera and add that to the 2.5A figure.
Hello.
Unfortunately, it seems like your combination of the Raspberry Pi and camera requires more power than the Romi 32U4 Control Board can provide. You could look into disabling the on-board regulator by connecting RPISHDN high on the Romi and powering the RPi separately (such as through a suitable external voltage regulator). You can find information about the RPi power circuit in the Power section of the Romi 32U4 Control Board user’s guide, and Jim’s post gives good direction on figuring out your power requirements. Another alternative might be to power the camera by itself separately, such as through a powered USB hub.
- Patrick