https://devzone.nordicsemi.com/f/nordic-q-a/12764/nrf51822-ceaa---dec1-pin-not-connectedHello, I am using nrf51822 ceaa package. What would happen if dec1 pin is not connected to a capacitor? According to the datasheet, it is for power decoupling and is connected to a capacitor on recommended circuitry. Would it cause any negativeen-USTelligent Community 13Tue, 29 Mar 2016 15:02:48 GMThttps://devzone.nordicsemi.com/thread/48488?ContentTypeID=1Tue, 29 Mar 2016 15:02:48 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4c74aa3d-5f07-48f6-a21a-4ada4e51bad0MartinBL<p>As you say it is a decoupling capacitor for the regulators powering the system and peripherals. Without it you might get noise from your power source propagated into the peripherals and/or experience power surges. It is close to impossible to predict what might or might not happen, and my one and only advice is to follow the design guidelines and use a capacitor.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/48487?ContentTypeID=1Thu, 24 Mar 2016 10:36:47 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d9cca9b0-1849-4837-9151-c9c05c54800aHelloworld<p>Through external voltage regulator down to 2.5v</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/48486?ContentTypeID=1Thu, 24 Mar 2016 10:35:05 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ca836cca-5037-497c-a14d-ae48a5bc7613Wojtek<p>3.7v? directly connected to nrf51?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/48485?ContentTypeID=1Thu, 24 Mar 2016 10:34:25 GMT137ad170-7792-4731-bb38-c0d22fbe4515:87192a77-ac6e-4b08-a357-42b51f4893c6Helloworld<p>Lithium polymer battery. 15mah</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/48484?ContentTypeID=1Thu, 24 Mar 2016 10:30:25 GMT137ad170-7792-4731-bb38-c0d22fbe4515:62228955-b227-4103-834b-9be70357c83cWojtek<p>What is your power source?</p><div style="clear:both;"></div>