NRF24L01+PA+LNA
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@flopp said:
Yes, different computers both GW and REP is powered by USB.
But same source the pa/lna module or also different?
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@Oitzu
PA is getting from a second USB port(not same as GW) through a step-down to 3,3.
GND is connected together from both ports -
@flopp said:
through a step-down to 3,3.I suspect linear regulator? Then it should, normally, no problem.
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@flopp said:
I have no knowledge about that but I don't think so, because I can turn on a screw to change from ~1.5-4 V
Oh, sounds like a switching regulator to me, but can't be sure. Does it have any name? A switching regulator could produce some significant ripple in your supply, that maybe needs to be filtered out.
Would try the shield first, and then see. :D
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@flopp said:
I have no knowledge about that but I don't think so, because I can turn on a screw to change from ~1.5-4 V
Oh, sounds like a switching regulator to me, but can't be sure. Does it have any name? A switching regulator could produce some significant ripple in your supply, that maybe needs to be filtered out.
Would try the shield first, and then see. :D
@Oitzu said:
@flopp said:
I have no knowledge about that but I don't think so, because I can turn on a screw to change from ~1.5-4 V
Oh, sounds like a switching regulator to me, but can't be sure. Does it have any name? A switching regulator could produce some significant ripple in your supply, that maybe needs to be filtered out.
Would try the shield first, and then see. :D
Thank you @Oitzu I change to a different step-down and it started to work, even without shield. Now I use this http://www.ebay.com/itm/DC-5V-to-3-3V-DC-DC-Step-Down-Power-Supply-Buck-Module-AMS1117-LDO-800MA-/281058278731
before it was this "s**t" http://www.aliexpress.com/store/product/RC-Airplane-Module-Mini-360-DC-Buck-Converter-Step-Down-Module-4-75V-23V-to/1686390_32266152653.html
Left is GOOD right is BAD
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@flopp said:
Left is GOOD right is BAD
Just to note: That is a little bit to simple. The left is a linear regulator the right one a switching regulator.
That are different technologies that both have there up and downsides. But for sensors a linear regulator often fits better, yes.it started to work, even without shield
Never the less i would recommend the shield for even better performance, especially if you want to crank up the pa_level for higher range.
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I gave up on trying to get the PA+LNB version working with my NodeMCU, reverted back to standard for now!
BTW, I tried it with many different power supplies and with without shielding. Tried for almost a week.
In the end I buckled and ordered a proper shielded version, awaiting its arrival...
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@Mark-Swift said:
In the end I buckled and ordered a proper shielded version, awaiting its arrival...
Where did you get this one? And also share your experience after arriving of the item
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The company also communicated some interesting issues that can cause issues with the nRF... Such as:
- Watch control voltage, they're easily damaged if you use 5v, hence they suggest pushing control voltage with a 1K-5.1K resistor, even better to use 3.3v (hence on my next one to play it safe I'll use a spare 5v -> 3.3v level shift converter too).
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@Mark-Swift let us know how they perform. The supplier looks very professional.
Would be interesting if they really reach the promised 2.1km :D
(I wonder with which antenna)even better to use 3.3v (hence on my next one to play it safe I'll use a spare 5v -> 3.3v level shift converter too).
Or use a 3.3V pro mini.
