RTC for stepper platform

Question

Do it yourself

I’ll make a reservation right away - I’ll probably write heresy. I'm still poorly versed in this, and I'm learning from my own bumps. For I simply don’t have time to thoughtfully smoke a lot of materials on electronics before starting to sculpt something. Thanks for understanding.

So the background is like this:

I have a Raspberry Pi. I want to connect several servo motors to it (because I already blinked my diodes, and the temperature sensor doesn’t excite me for some reason). For entertainment and educational purposes. And, in general, I read all sorts of terrible horrors about the fact that because. RasPi does not have its own RTCs, then there may be some jambs when controlling engines (they, as I understand it, are controlled by signals of a certain duration, and the occurrence of such jambs in the linux-python-gpio (i2c) bundle is me, with my level close to zero understanding of electronics seems quite real).

For control, it is planned to use some kind of multi-channel controller, such as PCA9685 with i2c (in the Adafruit wrapper, for 16 channels, because such constructors at least somehow documented in an understandable language suit me at the moment).

Actually, the first question is: do I need to separately screw a separate RTC to this all, or is it superfluous if a controller is used?

And second: if you can, poke your nose into some tutorials on how to use RasPi in this way for complete beginners. Because what I found - I can’t understand most of it, and I don’t know where to look to understand. Or at least how what is written for Andruino can be translated and applied in the case of RasPi.

Thank you.

Answer 1

RTC is not really needed here, IMHO.
Servo control - using pulses of a certain duration (usually they are significantly shorter than one second).
RTC is a "watch" - hours-minutes-seconds + calendar.