https://devzone.nordicsemi.com/f/nordic-q-a/35101/query-on-gpios-and-nrf51822-development-kitHi I have query on glowing multiple LEDs example 8 LEDS with GPIOs of nrF51422 So went through nRF51822 series based EDK design files and i see they use 4 LEds to which using 4DPT switch IC Can you please explain how they are interfacing LEDs hereen-USTelligent Community 13Wed, 06 Jun 2018 09:07:31 GMThttps://devzone.nordicsemi.com/thread/134867?ContentTypeID=1Wed, 06 Jun 2018 09:07:31 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1e32d7db-9124-4ed9-9cb9-033046df8ebcketiljo<p>The DPT switches are there to move the LEDs over to the IO extender (U7) in case a shield is being used. When a shield is not in place, the LEDs are connected directly to P0.21 to P0.24. When a shield in place, the leds are moved over to a I2C IO extended.</p> <p>If you need as much as 8 LED at the same time, you need to use a driver IC or a transistor pr LED. The nRF51 can&#39;t drive 8 LED simultaneously.&nbsp;</p> <p>&nbsp;</p><div style="clear:both;"></div>