With the multimeter turned on and the test leads plugged into their holes, find a car, truck, tractor or lawn mower with a 12-volt battery. Touch the black lead to the negative terminal and the ...

The multimeter will display the resistance of any item from 10 – 10,000,000 Ω, as well as measure the voltage of any battery you can manage to fit under the Minifig’s metal wrench.

Putting a resistor in the minifigs hands connects the resistor to a custom circuit that sends the resistance to a PC via a USB connection. There is also a way to test AA and AAA batteries.