PWM is going to be the key to taking the digital output from the arduino and turning it back into an analog signal.
the way i understand it now is that pulse width modulation is a frequency based square signal that gets output through a resistor to obtain a certain difference in potential.
how this goes from a square wave through a resistor at a changing frequency to give a -5 -> 5V signal is still to be understood.
PWM is going to be the key to taking the digital output from the arduino and turning it back into an analog signal. the way i understand it now is that pulse width modulation is a frequency based square signal that gets output through a resistor to obtain a certain difference in potential.
how this goes from a square wave through a resistor at a changing frequency to give a -5 -> 5V signal is still to be understood.