I just wanted thank debe and everyone else that contributed to this thread. I made a pair of these modules for my 1974 Evinrude 15 hp outboard that has a worn out timing plate. I tried a pair of Nova IIs first but they just fry after about 2 minutes of run time. My motor is an electric start version and has 4 magnets in the flywheel so it fires each cylinder twice per revolution which is I why I think the novas didn’t last very long. Or maybe cause of voltage spikes like debe was suggesting but I’m not as savy him on coils. The modules give a nice bright spark and lasted the duration of the 10 minute test that I put them through. This motor revs to between 5,500 and 6,000 rpm and they didn’t miss a beat at WOT. I used the 2SD1071 found here : http://www.ebay.com/itm/121097158690 and the 15ke200A for the diode. I started with very little knowledge of circuits and have only made one similar item in the past, a momentary pulse relay for a pig trap door actuator.
Yall don’t make fun of this Texan’s soldering skills! Scary that these look better than my relay!
