Improvised Munitions Handbook (Improvised Explosive Devices or ...

1. Separate loops by about 2 inches. Tie piece of fine
thread around wires near each loop. Thread should be
taut enough to support loops and wire, yet fine enough
that it will break under a very slight pull.
2. Fasten one wire to tree or stake and connect end to firing circuit.
3. Tie a piece of cord or string around the other piece of wire a few inches from the loop. Tie free end of
cord around tree, bush, or stake. Connect the free end of the wire to the firing circuit. Initiation will occur
when the tripcord is pulled.
Caution: Be sure that the loops do not contact each other when the wires are connected to the
firing circuit.
Other uses: The switch minus the fine thread may be used to activate a booby trap by such means as
attaching it between the lid and a rigid portion of a box, between a door and a door jamb, and in similar
manners.
7.7 Knife Switch
This device will close the firing circuit charges, mines, and booby traps when the trip wire is pulled or
cut.
Materials Required
Knife or hack saw blade
6 nails
Strong string or light rope
Sturdy wooden board
Wire
Procedure
1. Place knife on board. Drive 2 nails into board on each side of knife handle so knife is held in place.
2. Drive one nail into board so that it touches blade of knife near the point.