https://devzone.nordicsemi.com/f/nordic-q-a/15392/nrf24lu1p-vbus-vddIf use D+/D- to transmit data, does need to connect 5V to VBUS or I can open VBUS and connect 3.3V to VDD only? Thanks. BR Atlasen-USTelligent Community 13Thu, 28 Jul 2016 09:50:21 GMThttps://devzone.nordicsemi.com/thread/58779?ContentTypeID=1Thu, 28 Jul 2016 09:50:21 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a3a97e84-78f0-4bc0-9332-0ca09f6bba27H&#229;kon Alseth<p>Hi Atlas,</p> <p>If you want to omit the VBUS, you can supply 3.3V directly to VDD instead. Here is a snippet from the datasheet:</p> <pre><code>2.2.3 Power supply pins The nRF24LU1+ contains an on-chip regulator that produces +3.3V on the VDD pins, from the VBUS supply line (4.0 – 5.25 V). Alternatively, the VBUS pin can be left open and the VDD pins may be fed from an external 3.3V supply. In this case, the on-chip 3.3V regulator is switched off. </code></pre> <p>Cheers, Håkon</p><div style="clear:both;"></div>