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Detonator (EASILY OBTAINABLE): there is no reason to make this more complicated than it has to be... by using mobile phone detonators etc. As DDNP is easily detonated by fuse; just order a few meters of regular visco fuse in December during the fireworks season. There are thousands of pyrotechnique enthusiasts doing this all over Europe and most of the shipments get through with little consequence if detected. Just order from a couple of suppliers so that you will get at least one of the shipments. You can also create your own fuses, in which case; just visit online pyrotechnique forums (every country has at least one) for instructions. When creating the detonator skeleton cylinder you can also add a couple of grams of gunpowder (the flaked gunpowder used in shotgun shells are good) layered above the DDNP in the detonator. For most fuses; 1 cm equals 1 second, so if you want 2 minutes delay just use 120 cm of fuse. Visco fuses are excellent for this purpose but there are even better ones at some sites.