Nrf24l01 powering problem with LE33

[linkos]

Hello
I'm bulding a node (a motion captor) with an atmega328p and a 5v source
I want to use a LE33 for the VCC pin of the nrf24l01 but it's not working.
the debug log tell me that the radio is ok but I've a TSM Failure error and I can't connect to my gateway.
if i connect the VCC pin on the 3v out of a UNO card (that's the only thing a had for testing) its work like a charm.
I think i've missed something but I don't understand the problem
someone could help me a little bit?
Best regards

[mfalkvidd]

@linkos did you connect a capacitor close to the nrf?
For power troubleshooting, see the flowchart at https://forum.mysensors.org/topic/666/debug-faq-and-how-ask-for-help

[linkos]

I don't test with a capa because I was thinking it was not necessary because it was working with the 3v of the UNO.
Thanks for the link. I'll try it tonight
Best regards

[dpressle]

What capacitor are you using?

[linkos]

I'll try with a 4.7uf. But actually I've not allready try it. I'll test tonight after work

[dpressle]

4.7 uF is not enough, you need at list 10uF.
I had the same problem in my boards.

[linkos]

Ok thanks for your answer