Which arduino model to choose for the project?

Question

Arduino

Hello, I am doing a project for the course "Automatic call on Arduino". Which Arduino model do I need (taking into account the presence of a RELAY, ~ 10 buttons, 1 output for an electromagnetic bell, 2 for calls based on a speaker)?
If there is no model for so many inputs and outputs, what can be expanded?
I would be grateful for links to this model))

Answer 1

Arduino Nano / Arduino UNO 14 outputs - enough in theory
Not enough - you can reduce the number of button inputs involved.
For example:
studrobots.ru/analog_buttons