Arduino with Wall Wart Power Consumption?

Thread Starter


Joined Mar 2, 2012
Hey all.

I am going to be creating a circuit that will use a wall wart transformer to step the voltage down from 120VAC to about 9-12VDC for use in my arduino. The arduino should only draw 40mA max and I'm wondering what your estimates are for power consumption of the whole system. I'm estimating about 5W consumed by the transformer and 0.5W consumed by the circuit. Any thoughts?