Question about ADC pins on the BLE 33 board:
nrf_saadc_channel_config_t channelConfig = NRFX_SAADC_DEFAULT_CHANNEL_CONFIG_SE(NRF_SAADC_INPUT_AIN3);
This pin seems to configure pin A1 (P0,5) on the arduino input, but i cant seem to figure out the relationship between them.
When i look at this schematic i found online, it seems that AIN3 should be connected to A0 (P0,4)?
I just happened to find it on this pin by accident, so i was wondering if anyone has a better source i'd be interested to know whats going on.