you can use 3.3V from arduino
https://www.google.ca/search?q=nrf24&rlz=1C1AFAB_enCA475&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjxt4eI5_jaAhUPpFkKHengCBEQ_AUICigB&biw=1440&bih=744#imgdii=Kwx7VZnSfuG2aM:&imgrc=HxkYtdqyVyGLPM:
https://www.mikrocontroller.net/topic/402444