I have a circuit as such that will ultimately be used for a remote controlled race car:
I have a 5V power regulator (SMPS) to take 4 AA batteries to 5V. With this, I will power a Raspberry Pi, a DC brush motor, and a Servomotor. The construction of this circuit will be pretty modular, as the regulator, the Pi, the H Bridge circuit are all their own self contained components, and of course plus two motors – I will primarily be connecting leads together.
The race car will ultimately weigh 2 – 3 pounds, no more than 5.
My questions are:
- If I can count on my power regulator to have a filter capacitor to keep the voltage ripple to a minimum, do I need a bulk capacitor additionally for a 5V circuit?
- Do I gain advantage in having one bulk capacitor adjacent to each motor? Or would one be sufficient?
- Granted that this is a 5V circuit, how do I choose the capacitance for my bulk capacitor(s)?