Pulse Mine (Fallout 3)

The Pulse Mine consists of a proximity fuse and miniaturized EMP device enclosed in a gray metal casing screwed to the base. Armed status is indicated by four red diodes situated on top of the cover.

Gameplay
The Pulse Mine will begin beeping when a target comes within a short distance to it until it is disarmed or it detonates. The time until detonation depends on the Explosives skill of the person setting it off. Both soft and armored/robot targets will activate the fuse.

On detonation, the Pulse Mine creates an electromagnetic field affecting any functioning robots and Turrets. The blast deals little damage to non- robot targets in close proximity to the detonating device.

The Pulse Mine can be disarmed with a high enough Explosives skill or simply avoided with the perk Light Step.

The Pulse Mine will become live and likely to cause instant death after it's dropped into a non-player character's pants (inventory) via theft.

Locations

 * Talon Company mercenaries may carry some Pulse Mines with them.
 * Enclave soldiers and officers are often supplied with one.
 * They are also almost never found in the wasteland, at least armed. A single live one can be found in the National Archives Rotunda.

Boxes with Pulse Mines
One Pulse Mine guaranteed, 75% chance of 2 to 6 mines:
 * Two in the National Archives Secure Wing East.