Building Your Own Ignition System

Understanding ignition basics and building your own ignition system.

Sparker 4
Figure 4: Suppose we wrap two coils around an iron core and induce an electrical current into one coil. We'll call it the "primary coil." This will cause a magnetic field or flux lines to build around the iron core. As the flux lines are building and cut across the wires in the "secondary" coil, electricity will flow in the secondary coil. This is called induction.