Multiple Sensors Powered by single Arduino Mega

I hope this doesn't sound patronizing, but the entire point of an FYP is to learn how to research questions like this independently.

Were current and voltage calculations not covered in your courses? Of course, you have already consulted the specifications for each device you mention. Can you please follow the forum guidelines that are offered in the permanent threads at the top of the forum, and provide links, or post detailed information about those devices?

Also, it is not possible to offer good advice about power consumption and requirements, without knowing the use cases that will arise in the application. For example, how often the GSM module will be active (don't answer just that question, we need the whole breakdown).

Please read

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