Thanks for the response! I'm trying to set up an Arduino Nano 3.0 to read a Photodectector and also have the Arduino Nano export that data to an external storage device. The light passing over the photodetector will not be moving at any speed near the kilo hertz range so detection in the MHz range is not necessary, I just want to know what ADC setting I should write into the code to avoid aliasing but still have accurate data.