Fast measurement of pF capacity nRF52832 - high ADC noisehttps://devzone.nordicsemi.com/f/nordic-q-a/24316/fast-measurement-of-pf-capacity-nrf52832---high-adc-noiseHi all, I am using a BLE nano 2, which is based on the nRF52832. I am trying to measure small capacities of a few pF with this method: wordpress.codewrite.co.uk/.../ And the BLE nano 2: www.kickstarter.com/.../description So the code thaten-USTelligent Community 13Mon, 14 Aug 2017 15:09:11 GMTRE: Fast measurement of pF capacity nRF52832 - high ADC noisehttps://devzone.nordicsemi.com/thread/95739?ContentTypeID=1Mon, 14 Aug 2017 15:09:11 GMT137ad170-7792-4731-bb38-c0d22fbe4515:da9ea81a-189c-46eb-aa1e-fc7018e19590J&#248;rgen Holmefjord<p>Hi Christian,</p> <p>You can reduce the noice in the SAADC readings by enabling oversampling, but this is not implemented in the <a href="https://github.com/redbear/nRF5x/blob/master/nRF52832/arduino/arduino-1.8.0/hardware/RBL/RBL_nRF52832/cores/RBL_nRF52832/wiring_analog.cpp#L153">Arduino port of <code>analogRead()</code> for nRF52</a>.</p> <p>Oversampling can be enabled by setting the <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52832.ps.v1.1/saadc.html?cp=2_1_0_36_10_38#register.OVERSAMPLE">OVERSAMPLE register</a>, and enabling BURST mode in the <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52832.ps.v1.1/saadc.html?cp=2_1_0_36_10_7#register.CH-0.CONFIG">channel configuration register</a>.</p> <p>Best regards,</p> <p>Jørgen</p><div style="clear:both;"></div>