Ignition Output Driver - Block J


        This circuit is designed to drive up to eight (8) ignition sources.  These can be the GM HEI module that is supplied in the Edelbrock/Weber system, MSD boxes, individual ignition coil packs, or what ever your heart desires.  Either 5 volt or 12 volt devices can be configured.  The ULN-2803A is an eight channel Darlington open collector sinking driver with on board clamping diodes.  Two outputs are directed to the main Bosch input connector while the remaining six are directed to the rear DB-37 auxiliary jack.