The camera and projector were both created by Farnsworth for a military operation called Project Gemini in 1944.The idea was that the enemy would think you were closer, better equipped, and have more soldiers then you really did. However, somehow light became matter and a 3D picture of a Sherman tank shelled a crowd of people.The camera and projector are 2 halves of the same artifact. They were shipped to Warehouse 13, and the camera got there, but the projector's delivery label got torn, so it never reached the Warehouse and instead sat in the Univille post office for 70 years. The reason nobody missed it was because the Warehouse 13 manifest said it had it, but apparently they haven't done inventory in a while.
The projector brought havoc in Univille in "Beyond Our Control" because it was being used to play violent movies on TV for Brenda. The movies began projecting and solidifying in town because waves from microwaves and satellite dishes were somehow interfering with the transmission, which was why it was projecting all over town. Labelled as item 186 in the Farnsworth Aisle, the projector is 186-a and the camera is 186-b.