I am using a MEANWELL 35-B power supply to power the circuit(Datasheet). It says in Datasheet that the ripple and noise are about 80mV p-p for the 5v o/p.
I have Powered a strain gauge type pressure sensor using the 5v output of power supply. I am using an HX711 ADC to get digital values but the ADC output shows fluctuations and are unstable. I am guessing that the fluctuations arise from powersupply as i am powering ADC unit as well as sensor using the supply . I dont have (and dont know how to use)the DSO to check the ripples and noise.
Questions : 1)Can i reduce noise ?
2)Can i add capacitors (i havent used any yet) to reduce noise ? How can i determine the value of capacitors ? is there a way to calculate cap .value using the noise specs of powersupply ?
3)Any other ways i can try to reduce analog noise like series resistors on sense rails?