Downside to using a large decoupling cap nRF20L01+?

Using Arduino General Electronics
1

I have been experimenting with nRF24L01+ radios for a few weeks.
So far, so good.
But this has just been short distance at low power.
From reading it seems I may run into issues using higher transmitting power on devices like a Mega or Nano. This issue appears to be solvable with the use of a decoupling capacitor.
So, since I am placing an order for other parts this week anyway I thought I would add in some capacitors to try to eliminate a potential problem with my radios later down the road.

But when trying to figure out which size I should purchase I ran into a problem.
There does not seem to be much agreement as to the proper size.

This site shows .1uf to 1000uf.

This page says .1uf to 10uf or higher

This page recommends a 4.7uf

Here seems to say 10uf-47uf plus a 10pf

Here it recommends 100uf minimum

100uf-400uf here

And finally a 470uf and a 10nf

The recommended numbers are all over the place. And I only linked a small sample of the many pages I have been reading trying to figure this out.

The place I am ordering my other things from offers .1uf and 1000uf.
Both sizes are in the recommended range(though admittedly the 1000uf is not recommended often).

So would it cause issues or be ineffective to use both? Some places recommend two sizes together.
How does one determine if a 10uf or a 100uf or a 1000uf would be better or worse?

2

Different sized caps are used to solve different problems. High frequency noise on the power lines can sometimes be fixed by a small cap (e.g. 10 nF), while voltage droop due to high current draw during transmitting can sometimes be fixed by a large cap (e.g. 470-1000 uF).

People very often use parallel combinations of capacitors to help with both problems.

Power supply decoupling is a very complex topic and involves a lot more than just capacitors. Proper grounding, resistors and inductors are also extremely important.

3

The small, normally 0.1uF must always be ceramic.

The larger one will not be. You get problems if it is not big enough but it is rare to get problems with them being too large. The too large problems are due to the high initial current required on switch on not with the operation. Other than that it can not be too large.