To enable the user to connect external hardware, Nordic Thingy:91™ routes some of the General-Purpose Input/Output (GPIO)s to
connectors or test points and transistors to drive higher currents.
N-MOS transistors
Nordic Thingy:91 is equipped with four N-MOS transistors that can be used to drive small DC motors or LEDs. The drain and source of the transistors are available on external connectors and the gate is connected directly to the nRF9160.
Connectors
In addition to the N-MOS drain and source on P7, power domains and extra GPIOs can be found on connectors P3-P6.