You can, but it's not a good idea, especially if the servos are relatively powerful.You can drive servos from the 5V pin of the Pi.Do not try to power your servos and/or motors from the Pi! That will not be possible!
What is your servo supply voltage?
What is your DC motor supply voltage?
What is the current required by each of them (min and max value)?
How do you power that smart car? You won't have a power wire connected to it, right?
Now your able to outline your power supply setup. If the servos i.e. are 5V ss well I still suggest driving them via an independent power rail (not from the same DC/DC that supplies yoir Pi).
Computers in general like a nice "clean" power supply, where there is not much variation in voltage. Adding variable loads at significant current to the Pi's 5V rail will introduce a lot of "noise", or variation in the voltage at the Pi. This is because the wires between the PSU and the Pi have some resistance, and as the current varies this becomes a variable voltage. Whie in theory the Pi's PMIC will cut this out, it is better practice to wire the servo supply straight back to the PSU, or even better to a separate 5V regulator.
Note also that any current you draw from the Pi's 5V GPIO pins will reduce the current available for storage devices, cameras, or other peripherals powered through the Pi. If your supply is capable of less than 5A, this could be serious. I would recommend ensuring that the Pi has its own (not shared) supply of 5V1 capable of 5A.
Finally remember that, if your PSU for the Pi is not USB-PD compliant, you will need to configure the Pi to know that it has 5A available.
Statistics: Posted by davidcoton — Sat Jul 06, 2024 8:32 am