Datasheet

Add the breakout board:
Place the breakout board over the pins so that the short
pins poke through the breakout pads
And Solder!
Be sure to solder all pins for reliable electrical contact.
(For tips on soldering, be sure to check out our Guide to
Excellent Soldering
(https://adafru.it/aTk)
).
© Adafruit Industries https://learn.adafruit.com/bluefruit-nrf52-feather-learning-guide Page 16 of 175