When I try to measure the power consumption of various Wiimote accessories, the multimeter only says 0.0mA, so I wonder if I'm doing it wrong.
Here's how I measure:
A more detailed explanation:
Like I said, I wanted to measure the power consumption of various Wiimote accessories, like Raphael of raphnet.net does here. He states he uses a modified Wiimote extension cable.
So, I modified an extension cable myself: cut it in half, with one side hooked up to the Wiimote, and the other to the accessory I want to measure, a Classic Controller for example.
The wires inside are connected to a breadboard. There I connect every wire together again except for the 3.3V ones, which I put a multimeter in between.
The colored lines in the illustration represents the wires. Red + yellow = 3.3V, black = GND, green = SDA, blue = SCL.
The multimeter (an inexpensive Uni-T 20B) manual says: "Break the current path to be tested. Connect the red test lead to the more positive side of the break and the black test lead to the more negative side of the break."
Isn't this what I've done? I've set the multimeter to DC current measure (in the range of 20mA).