Nothing spectacular here, just a small kit that I keep in the pack for setting rear security at an OP / LP.
There are three devices of passive and non-passive to allow trip wire to be ran to. The passive layer (IR LEDS) is set farthest away (approx. 50M) and up high on a tree for line of sight by NODs if tripped.
I modeled them after the video below, with the modification of using a battery holder for ease of replacement. I
The non-passive are three actuators off a training grenade modified to fire off a shotgun primer. Very loud, does not require batteries and is waterproof.