Abstract: An ignition system for an internal combustion engine having a magnetically conducting core with at least three legs and supporting a charging winding and a triggering winding. A flywheel, having at least one magnetic field generating member, cooperates with a magnetically conducting core to cause, when passing, voltages to be induced in the windings. An electronic switch is adapted to trigger, in response to a trigger pulse generated by the triggering winding, the discharge of a first capacitor which has been charged by voltage generated in the charging winding, via the primary of an ignition coil, a secondary of which comprises a spark plug. The triggering winding is wound about two of the legs on the magnetically conducting core whereas a third leg supports the charging winding.