Hello ,
I have interfaced one NTC sensor with above attached image and below information :
SAADC pin : AIN2 ( NTC - pin )
VCC_nRF voltage = 3.3V
R14 = 51KOhm , 0.5%
example code :
init code >>
uint32_t err_code ;
nrf_saadc_channel_config_t channel_config =
NRF_DRV_SAADC_DEFAULT_CHANNEL_CONFIG_SE(NRF_SAADC_INPUT_AIN2);
err_code = nrf_drv_saadc_init(NULL, saadc_callback);
APP_ERROR_CHECK(err_code);
err_code = nrf_drv_saadc_channel_init(0x01, &channel_config);
APP_ERROR_CHECK(err_code);
ADC read code >>>
nrf_drv_saadc_sample_convert(0x01, &sample_read); // where sample_read is my adc data from sensor
I am getting adc values in the range of 378-380 ( normal environment temp ) and value decreases as soon as I touch the thermistor .
How do I convert the adc value into deg Celsius ?
FYI : R15,R16,C27 are not loaded .
