https://devzone.nordicsemi.com/f/nordic-q-a/61550/nrf52832-custom-board-voltage-output-controlHi guys, Im now developing my custom board with nRF52832 based on the reference schematic below. And using Keil uvision for a programming my board. The final objective of my project is to give a current stimulation though one of output port with bluetoothen-USTelligent Community 13Wed, 20 May 2020 08:55:53 GMThttps://devzone.nordicsemi.com/thread/250880?ContentTypeID=1Wed, 20 May 2020 08:55:53 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f598ab00-cb42-41a0-9918-1a9448fda892Jared<p>Hi,</p> <p></p> <ol> <li>Depends on the current that you want. The GPIOs have a <a href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52832.ps.v1.1/gpio.html?cp=4_2_0_19_3_0#unique_1511470077">maximum output current of 14 mA.&nbsp;</a></li> <li>The toolbox application is the more &quot;general&quot; one, and is more fitting for custom applications.&nbsp;</li> </ol> <p>&nbsp;</p> <p>[quote user=""][/quote]</p> <p>I think ble_app_blinky example would be help for me, but have no idea it would work because when I practice with my DK board, LED doesn&#39;t seem to be connected to nRF52832 chip directly.</p> <p></p> <p></p> <p>&nbsp;The example turns LED2 ON when the DK connects to a central. The LED on the DK IS connected to the IC:</p> <p><img src="https://devzone.nordicsemi.com/resized-image/__size/320x240/__key/support-attachments/beef5d1b77644c448dabff31668f3a47-c879cca8b08b4daba6f031cee2cdb153/pastedimage1589964913554v1.png" alt=" " /></p><div style="clear:both;"></div>