Analog input mode is selected by setting switches 1 and 2 to the UP position. Switch 3 should be
either up or down, depending on the battery type being used. Inputs S1 and S2 are configured as
analog inputs. The output impedance of the signals fed into the inputs should be less than 10k
ohms for best results. If you are using a potentiometer to generate the input signals, a 1k, 5k or
10k linear taper pot is recommended. In all cases, an analog voltage of 2.5V corresponds to no
movement. Signals above 2.5V will command a forward motion and signals below 2.5V will
command a backwards motion