Re: Testing timing of Red Atom Modules Home › Forum › Ask A Member › Testing timing of Red Atom Modules › Re: Testing timing of Red Atom Modules debeReplies: 103Topics: 0 June 6, 2018 at 2:02 am #77507 This is a Briggs & Stratton ignition coil that I pulled apart again uses a Darlington transistor to fire the coil.