I m curious as to why the Adapter is not covered in Parts?
It is a small adapter that plugs easily into a breadboard where the NRF24L01 module plugs into it.
It allows it to be powered by 5 volts instead of 3.3v; it has a 3.3v regulator built-in.
It plugs into the breadboard to make life easier.
Some places sell the Adapter along with the NRF24L01.
Could this be added to Parts?