Multimeter

The multimeter provides the easiest way to know everything about certain blocks. This will provide a hand-held tool to check for any mistakes in your circuits or if you want to see what is going on in your circuits.

Use
Equip the multimeter by selecting the corresponding inventory slot. Then look at the block that you want to know some details about. Once you get the cross at the center of the screen over the block, press the right mouse button to analyse the block. This will tell you the current flowing through the block, the voltage over the block (which shows how much power can be made) and the amount of power the block is using.