https://devzone.nordicsemi.com/f/nordic-q-a/60108/reading-digital-output-pin-with-analog-inputHi!, I am trying to use one of the analog inputs for reading the voltage using saadc. Since a don&#39;t have a battery now that is about 3.5V or less, I decided to use one of the digital outputs as source. So I have successfully activated a pin to outputen-USTelligent Community 13Mon, 13 Apr 2020 08:05:41 GMThttps://devzone.nordicsemi.com/thread/244276?ContentTypeID=1Mon, 13 Apr 2020 08:05:41 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4962ce4d-3800-49b4-955d-655d0fbc988aCrom87<p>I have rechecked that the input pin was the correct one, and after reading the documentation from my board again (PCA10040)&nbsp;and you are right, the AIN0 is for pin 2, but I had it connected to pin 3. It confused me that the board says P0.03(A0), but A0 is not AIN0.&nbsp;</p> <p>It is documented in:&nbsp;<br /><a href="https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/boards/arm/nrf52_pca10040/doc/index.html">https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/boards/arm/nrf52_pca10040/doc/index.html</a><br /><br />So everything is now working correctly :). Thank you!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/244265?ContentTypeID=1Sun, 12 Apr 2020 23:11:08 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1e65efe9-42af-4107-aaf1-f9a28f27b215hmolesworth<p>Edit - I see pin 5 was the output, my mistake. Is the input on pin 2? (AIN0 is pin 2 if I recall ..)</p><div style="clear:both;"></div>