Skip to main content
Arduino

You are not logged in. Your edit will be placed in a queue until it is peer reviewed.

We welcome edits that make the post easier to understand and more valuable for readers. Because community members review edits, please try to make the post substantially better than how you found it, for example, by fixing grammar or adding additional resources and hyperlinks.

4
  • I plugged in a multimeter and tested different configurations. In both cases the current only jumps up to ~150mA which is ok for the esp32. But on one battery USB output, the voltage dips down to 3V as different parts turn on/off, that's too low for the esp32 and it becomes unstable. Adding 4x100uF caps across the power rail didn't help. When they are on separate battery USB outputs, the battery maintains a steady 4.8-5V. I guess there's not much I can do about it, they have to be on separate outputs. Commented Apr 29, 2022 at 19:56
  • The LED ring is an FY-530, the specs say 200mA. I didn't see a voltage dip when it turned on, perhaps that part is ok. The problem could be that the two esp32 circuits on the same power source act as a voltage divider? Is there a technique to prevent that? The power bank seems to deal with it somehow, as they are designed to charge two or three phones etc. at the same time. Commented Apr 30, 2022 at 6:13
  • 1
    @Gambhiro Things in parallel don't divide the voltage, they divide the current. Maybe there is a mistake in your wiring. Commented Apr 30, 2022 at 12:25
  • Thanks for the comments, I'm sorry about the clueless question. A proper question would probably have to approach ESP32 power supplies in general. Perhaps it would be best to delete the question. Commented May 1, 2022 at 5:53