Fallout 4 traps

Traps in Fallout 4 can be found all over the The Commonwealth.

Barnacle
The barnacle is a slightly larger than normal barnacle found in a few places such as Neponset Park and an unmarked location NW of Breakheart Banks. The barnacle upon getting close to releases a radioactive cloud that gives the Sole Survivor +30 rads/s.

Makeshift bomb
The makeshift bomb can be found in various places like Hugo's Hole and has the appearance of a cigar box with a small circuit board with some diodes in it and duct tape holding it to a wall. Upon disarming a makeshift bomb the Sole survivor nets a Spring,Steel & Copper.

Jury rigged guns
There are numerous types of guns jury rigged to fire at an entrance way when a tripwire or other form of mechanism is activated. These can be double barreled shotguns, pipe pistols & missile launchers.

Gas trap
Gas filled rooms. Fire a weapon in one and a fireball erupts. One can be found in the diner in Easy City Downs.

Gasoline (Petrol) trap
Rainbow coloured discolouration on the ground indicates gasoline/petrol. Ignites when shot.

Grenade bouquet
The grenade bouquet is one to three fragmentation grenades being held by a small wire or string that, upon triggering, a tripwire pulls the pin and drops them to the ground. Upon disarming a bouquet the Sole Survivor gets grenades based on how many were in the bouquet.

Spotlights
Spotlights are moving light which can detect and alert enemies to intruders. They will continue to follow intruders with their light while one is in their line of sight and also constantly beep an alarm out while doing so.

Clapping Cymbal Monkey
These monkey dolls will be placed around an area and will raise their head to look at intruders with green eyes. Should the intruder remain in their line of sight too long, their eyes will begin flashing red and they will begin clapping their cymbals together. This will alert nearby enemies to the intruder.

Tin Can Chimes
A string of tin cans suspended from a doorway or ceiling. They will chime and alert nearby enemies to one's presence if the Sole Survivor or a companion runs into them.

Handmade trip wire
The handmade trip wire appears to be a green thread or fishing line that's put across walkways to make a trap go off. Upon disarming the tripe wires the Sole Survivor is awarded a gear and a spring
 * Three can be found in Hugo's Hole

Laser tripwire
The laser tripwire is a fairly obvious tripwire as it emits multiple red lights that are easily seen.
 * Two can be found in the Taffington boathouse
 * Dozens can be found in the basement of the town hall in Jamaica Plain (location of the 'treasure').
 * Upon disarming a Laser tripwire you get a Fiber optics and a Crystal

Tension trigger
The tension trigger appears to be a small box with short range radio capabilities as it has antennae and no physical connection with what they activate.
 * One can be found in Revere Beach station
 * Upon disarming the Sole Survivor is awarded a Spring & a Gear

Bathroom scale
The bathroom scale appears to be a normal bathroom scale with the word "Dead" written on the numbers.
 * One is inside Dunwich Borers.
 * Upon disarming the scale the Sole Survivor is awarded a Copper,Spring & Steel.
 * A huge number of these can be found in the maze near Milton General Hospital.