Well 6 of them were my doing. My ability meant I could implant a bomb into someone each night. DaveShack was able to provide me with more bombs, when I ran out. 4 of those detonations were my implants, Winston Hughes had been given a glovebomb I believe (still not sure of the details of that), and I had already implanted the worn ring in Darth Caesar, which was then voted to Camikaze I think.
The detonator could be used at any time, and would detonate all bombs not in the werewolf teams possession. Plus, a PG was to have at least 5 people detonated at once, otherwise I'd have probably used it as a second kill each night.
As it happens Diamondeye inadvertently asked me for the final bomb. He wanted the amulet, so I obliged. I had the amulet since the start, and felt it was the only item in my possession that I could validly pass off to someone.