Timeline for Arduino | external power supply and USB at the same time
Current License: CC BY-SA 4.0
3 events
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| Mar 26, 2023 at 18:22 | comment | added | stevo | Yes correct, I'm asking exactly this: Why is this circuit powering ("back driving") the USB device. Well I think @jsotola answered already my question: There is a small body diode within this p-channel mosfet which allows current to flow into the USBVCC direction. Yes, I'm disconnecting the 5V pin, that was also my workaround idea. (Actually is very simple in my situation: My RPI is connected with a cable soldered to the usb plug of the Arduino.) | |
| Mar 25, 2023 at 14:21 | history | edited | st2000 | CC BY-SA 4.0 |
Added answer to specific MOSFET question w/in the post.
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| Mar 25, 2023 at 14:05 | history | answered | st2000 | CC BY-SA 4.0 |