4 Ways To Read Schematics
If a power source has an alternating current (AC), you’ll see a squiggly line drawn in the middle of the circle. If the power source has a direct current (DC), you’ll see a plus and minus sign on the top and bottom of the circle, respectively. Constant power sources are indicated with a downward facing arrow in the middle of the circle. The power source sends different types of electrical currents throughout the circuit....