In the spirit of "wanting to know why", I did some research today on decoupling/bypass capacitors, and came across mentions of a decoupling inductor, such as:
However, no where could I find mention of how to calculate what size inductor you needed.
This seemed like it would be useful in robots, where you commonly have noisy PWM generators and motors working together. On the other hand, the fact that I haven't seen it used suggested there might be a reason not to.
Is this a good idea, or bad idea ? Is it just that separate batteries are usually easier ? If it is a good idea, how do you decide what size inductor to use ?
-Chris