Far from flawed, quite a bit of work has been done on the relationship between eletronic theory and the study of hydrodynamics (sub discipline of fluid mechanics). Arao, here's a quick tutorial in support of Kolban's post. I use a similar analogy using the water system to water the lawn! Maybe it ca...

Hello... Attenuation has a type adc_atten_t that has four atten settings, 0(ADC_ATTEN_0db),1(ADC_ATTEN_2_5db "2.5db"),2(ADC_ATTEN_6db), and 3(ADC_ATTEN_11db).

Hello StefanRavn. SparkFun has more info about this device on their website (ESP32 Thing product). You are correct that some pins may be used for ADC only, as these do not have pull up resistors as other GPIO pins. On four of the pins they use 270pF caps for stabilization of the ADC performance. The...

Hello, I would like to locate the analog specs for the ADC preamp. Seems like I read somewhere that the preamp has 60db of gain (amplification). Background: My ESP32 implementation will include an external bandpass filter on the analog input (w/ or w/o preamp feature). The low pass filter section ha...