Designing a power meter using Arduino.

I am very new to arduino, but I am using video tutorials online so far to get better. i want to design a power meter using arduino. Please can anyone put me through, on what and what I need to know before I can do this. Also, links to where I can get a better and faster knowledge on arduino. Thanks.


What kind of Power Meter do you want to make?
There are many sensors for the Atmel µCs.

For sensing Voltage You basically need only some Resistors.
For DC current You can use something like the ACS712.

I would suggest You begin with the display for output.
LCD, OLED or TFT? Maybe TFT with Touch?

Broke Your project in to his key parts.
Input (buttons), output (Display) and sensing (collecting the sensor data).