I am sure that everyone will find the attached Spike Schematic helpful.
I gave a class for the electrical students and the subject of the workings of the Spike came up. I never really understood how these things worked so I took one apart and drew the schematic. It really is simple. I had to guess at a few things but the schematic is close enough to help the students understand how it works.
Mike Webb Mentor Team 79 Team KRUNCH
frc-spike-relay1.pdf