So I have and idea for one project but I cant find how to make adjustable power(wattage) flowing through circuit. That should be possible. About displaying it there is no problem because almost any display can do this job. But yah, is there any way to adjust wattage in arduino?
Adjust the power flowing through what circuit exactly?
... But yah, is there any way to adjust wattage in arduino?
change the voltage or change the current - the wattage will change automatically !
What is your project, your application?
We need more information?
Are you trying to make a dummy load?
What do you mean when you say power? There are a number of things you can do to lower the current consumption of an Arduino. Sleep mode. Lower voltage. Slower clock. As far as the circuit and what you have connected that’s another issue and one we can’t consider without more information.
Nah! Total XY problem!