Arduino Nano and NRF24L01+PA+LNA
BassTeQ last edited by
For my gateway Im using a Nano that has 3.3v outputs, along with a NRF24L01+PA+LNA radio (from the mysensors store)
Is there any problem powering this radio from the 3.3v output? I've read a few threads that seem to indicate that the output may not be strong enough for the lone range radio?
Appreciate any advice.
My experience is that it will work if you change myconfig.h to low power setting for the radio.
However, for best results I would suggest using a different power source and a LE33 or other regulator to provide significant power for the antenna. The nano only outputs 40mA.
There are a lot of threads that address this question if you dig. I am fairly new here but I use a 5 volt 2 amp power supply when I use the nano with the NRF24L01+PA+LNA. I wire the nano directly off the power supply and use a regular between the power supply and the radio.
BassTeQ last edited by BassTeQ
Thank you for the reply. I'll set the power to low to begin with.
I'll look at using a LE33 should I need to ramp up the power.
Whats the difference between the LE33CZ-TR and LE33CZ-AP ?
The AMS1117 might be a better choice for the NRF24L01+PA+LNA
use LE33 for the standard NRF2401+
The gateway is the most important part of the network so worth doing well
I'm not sure the difference in those two but check out the store page:
The LE33 does work with the NRF24L01+PA+LNA but I think the XC6206P332MR would be even better. The LE33 has a maximum output of 100 mA and the XC6206P332MR has a maximum output of 250mA.
BassTeQ last edited by
Thanks will order some, good to keep then at hand
dpressle last edited by
@Boots33 i could not make the NRF2401+ work with the le33 i moved to lm117 or 662k and it works, just wasn't enough juice...
I have had the standard NRF24L01+ working with an LE33 without problems but the NRF24L01+PA+LNA uses a lot more power and really needs a bigger regulator. the AMS1117 has plenty of headroom and is very cheap, so is a good choice. Have a look at the scope readings about half way down in this thread
I have nodes running off the LE33 and NRF24L01+PA+LNA shielded that are running on "HIGH" power. I have not had any problems with them although in theory they should not work.
I'm glad you cited the AMS1117. I will give them a try. It looks like they have a max output of 800mA. Is that correct?
@Ironbar I am sure the LE33 will work with a NRF24L01+PA+LNA as well, in fact I have done so on the bench too. The problem lies in that you are using a 100mA regulator to supply a device that has the potential to draw more than 100mA.
The NRF24L01+PA+LNA only draws the extra current for a short burst when transmitting so a node may work OK.
With the gateway which will be doing a lot more work as the number of nodes increases you may find you will have problems.
As I said the gateway is the key component for the whole network so it is in your best interest to have it perform at its highest level.
I think the AMS1117 datasheet lists them as 1A devices. I also think you would want to have it securely bolted to a block of ice if you were to try and get that out of it
Boots33, I completely agree. I have recently decided to rebuild my gateway and I am very pleased this thread came up so I can use the AMS1117. Any idea what the NRF24L01+PA+LNA has the potential to draw? I have looked through the data sheets but I have not came up with a definitive answer.
Although my mysensors network works very well, I am always looking for a way to improve it. I learn something new almost every day from this forum so thanks for your input.
Yes it is hard to find a data sheet on, most suppliers seem to quote around 115mA but I would allow a bit more just in case.