What's the meaning of N.C. on the capacitor?

[lgs]

Hi  Team,

I am confused about the symbol of "N.C." on a capacitor. Like this:  --- Could you help me explain this?

[hmolesworth]

"NC" Not Connected, usually same as "DNP" Do Not Place or "DNI" Do Not Install. Safe to pretent it doesn't exist unless you need to fit it  for a specific purpose; here probably to tune an antenna/ariel.

[lgs]

Thank you very much!

Does the nrf52840 chip need an ant so that it can send messages?

[ketiljo]

Of course it needs an antenna

[lgs]

Hi Ketiljo,

Thanks for your help!

Could you provide the type of ant? 

With best regards,

Gaosheng

[ketiljo]

The antenna on the DK is a 1/4 wave PCB antenna