ESP32 Forum

Description: If power is given to device from laptop, ADC point is stable but if using power adaptor or other dc power source at same voltage reading ADC point fluctuation is detected.  ADC points are read using adc1_get_raw().

nikeshpatel1008 wrote: ↑

Mon Jan 23, 2023 11:50 am

Description: If power is given to device from laptop, ADC point is stable but if using power adaptor or other dc power source at same voltage reading ADC point fluctuation is detected.  ADC points are read using adc1_get_raw().

Yes, I am having the same issue. I have configure the ADC1_CH6 as 12 bit adc, Vref = 1.1V and attenuation = 11Db.
The ADC pin is reading the op-amp circuit output. and circuit is connected with the FSR sensor.
Here, I have attached the picture of the Op-Amp circuit. Where FSR1 is ADC1_CH6 pin.