https://devzone.nordicsemi.com/f/nordic-q-a/41728/strange-value-of-adc-nrf51822I&#39;m coding a feature to measure the battery voltage via the internal VDD with an ADC. The result I get from a 2,75 voltage source is 170. When using the calculation ((((ADC_VALUE) * 1200 ) / 1023) * 3) my output would be 598mV. The calculation isen-USTelligent Community 13Wed, 19 Dec 2018 07:46:40 GMThttps://devzone.nordicsemi.com/thread/162412?ContentTypeID=1Wed, 19 Dec 2018 07:46:40 GMT137ad170-7792-4731-bb38-c0d22fbe4515:fe9ffb07-b72e-47b0-8030-76e6e7085aecMEMaarten<p>I found my typo and changed:</p> <p>adc_channel_config.config.config.input&nbsp; &nbsp; &nbsp; = NRF_ADC_CONFIG_SCALING_INPUT_ONE_THIRD;</p> <p>to</p> <p>adc_channel_config.config.config.input&nbsp; &nbsp; &nbsp; = NRF_ADC_CONFIG_SCALING_SUPPLY_ONE_THIRD;</p><div style="clear:both;"></div>