The digital ramp generator circuit in the figure, however, can vary the ramp frequency from less than 1 Hz to about 30 kHz just by varying the input clock from 100 Hz to about 6 MHz.

I have generated a form that has multiple textboxes and two listboxes for user input. I have gotten the input of the text boxes and only 1 input from the listboxes, but if I select more than one ...