Arduino micro with nRF24L01+ board and power supply on Vin

Projects General Guidance
1

Hello,
I have two arduino micro communicate together with the nRF24L01+ card (with 10uF cap on its power supply)
Everything works when I use the pc's usb. But as soon as I use a stabilized power supply (from 7 to 12V for example) on the Vin terminal, the cards no longer send the communication.
I have to connect the arduino with the usb cable.
However I have all the voltages available (+3.3V, +5V and +3.3V on nRF24L01+)

Would you have a track to suggest to me?

Thanks

2

Welcome to the forum

Your topic was MOVED to its current forum category which is more appropriate than the original as it has nothing to do with Installation and Troubleshooting of the IDE

3

What is that "stabilized power supply"? What is the current capability of the power supply?

4

is to not use thee micro as a power supply.
The onboard converter is likely not heat sinked and overheat. Provide +5, or +3.3, for the nRF24L01 from a genuin power supply. Transmitters often need 1 or 2 amps momentarily. The tiny copper strip on the controller board is not designed for such currents.

5

Ok thank you, I will connect the power supply directly to the nRF24L01 board. I'm testing this on Monday.

6

With the nRF24L01+ board supplied with 3.3V via an external power supply and the arduino micro with external +12V it works.

I noticed that when the arduino micro is powered externally (no usb) and the nRF24L01+ is on its 3.3V the arduino heats up.

Currently I only have two arduino micro and two nRF24L01+ boards there is nothing else connected to the arduino.

7

nRF24L01 consumes quite some power. And as said, the Arduino is not a power supply.

What is the component that gets hot? Reasonably sure that it's the 5V regulator that now has to dissipate more than the Mirco design caters for.

8

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