get a fuse and spark it with fire or spark or whatever. theres stuff like wifi im not sure how that works.
Ok, so instead of making it unpause detonated, take the detonation component out. Now, pause the simulation, put PBCN in the center (Give it some empty space to clone, prefferably closed in by something that your detonation component can escape) Now, put PSCN inside the PBCN, and in the very center, put a pixel of WIFI. Now, press the ~ or ` key and in the bar that comes up, put !set ctype pbcn (detonation element here) then press enter. For example !set ctype pbcn neut. Now that you have done that, build your detonator. Build the trigger/button out of PSCN and put a pixel of WIFI in it. Now, make sure that both pixels of wifi are the same temp. Spark the button, PRESTO.
Either use a fuse (IGNC), or you can do it remotely by electronics. Depending on what your bomb is (TNT, NITR, PLUT etc.) different things will ignite it (FIRE, NEUT, ELEC etc.). You should follow RAYZR's instructions to do so.
However, I ought to remind you. When you are setting WIFI, they will only transmit to eachother if they have the same tmp and tmp2 values. These can be changed by going into the console and typing !set tmp wifi VALUEHERE and !set tmp2 wifi SAMEVALUEHERE .