Hardware selection advice is needed to control 16 servos independently

[fbeleznay]

I was trying to look at the documentation and search this forum, but I am not sure about the information I found.
I am looking for a hardware that has a display and an sd card slot and can control 16 servos independently.
I was looking at the M5stack core s3 se, but it is not clear for me from the documentation how many i/o pins I can use. On the schematic diagram I can only see three GPIO pins (G5, G6, G7). Are these the only three that I can use?
If yes, is there another controller that I can use, or is there an i/o extender that can connect to the core s3?
Sorry about the basic question. I am new to microcontrollers, I want to make sure that I am looking at the correct hardware for my goal before I buy it.

[robski]

@fbeleznay
https://docs.m5stack.com/en/module/servo
https://shop.m5stack.com/products/8-channel-servo-driver-unit-stm32f030
https://shop.m5stack.com/products/servo2-module-16-channels-13-2-pca9685

[fbeleznay]

@robski
Perfect, thank you very much.
Can you please confirm that I understand this correctly?

• The M5stack core s3 se is compatible with the 16 channel servo2 module

• I need an external 6-12 volt power supply for the servo module

• Do I also need a separate power supply for the controller, or can the controller get power from the servo? If I do need a power supply, can I use one of the battery bottoms, like for example the din base?

And one last question, which probably should be in a separate thread. Is there a similar module for turning relays on/off (or can these PWM channels be used for this instead of controlling servos)? I could find the relay module, but that is only 4 relays and I need 16.

Again, sorry about the basic questions. I have a project in mind (a computer aided 16 shaft loom) that needs moving 16 harnesses up/down. I need 16 channels to control these movements. This can be done using servos or using solenoids.