Idea of Dynamo Icon
It is a square with a line cutting it in half diagonally from top right to bottom left. in the left section of the square we have a squally line and in the right sections we have a small horizontal line with 2 smaller horizontal lines under it. these are the symbols for ac and dc respectively
This Dynamo icon is made in Material Design style
developed by Google. This style is based on extremely simplified shapes, thin two-pixel lines, and is optimized for 24x24 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 6,200 icons, all in the same style and quality.