I'm trying to control two DC motors with an Arduino. I'm using Sabertooth 2X25 motor driver with 12V battery. While reading Sabertooth data sheet http://www.robotshop.com/eu/PDF/dimension-engineering-sabertooth-2x25-detail-specs.pdf, I came across this explanation on page 11: If you are using a filtered PWM signal from a microcontroller to generate the analog voltage, an R/C filter with component values 10k ohms and at least .1uf is recommended as shown in Figure 4.1. Using a larger value filter capacitor such as 1uf or 10uf will result in smoother motor operation, at a cost of slower transient response. A PWM frequency higher than 1000Hz is recommended.
Can please someone help to explain this? I'm a programmer, not an electrical engineer so I don't know what's this all about-