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Electrically, I’m using this basic arrangement for the LED:¬†https://www.arduino.cc/en/uploads/Tutorial/ExampleCircuit_sch.png

From there, I’m hardwiring¬†the output of the shield (right channel) to the Analog Input (sensorPin) through 1 uF cap.

Is there a recommended way to do the rescaling of volt-to-PWM? What about slowing the sampling rate? I’m not sure I know how to do these procedures. I’m sorry for the newbie questions, I’m sure this is a huge waste of time for you – but I know you are helping out of the goodness of your heart and I appreciate it a great deal. I’m still learning.