Knife switches are most closely associated with horror films set in the 1800s, especially in underground laboratories such as the one depicted in Mary Shelley’s novel Frankenstein. This double knife-double throw switch allows for up to two circuits to be live or to be turned off. Simply connect the ends of the circuit to the two metal screw contacts on the switch and instantly you have mechanical way of breaking and connecting a circuit.
This is a great clean heat demonstration model for the classroom setting!
Easily assemble a working alarm motion detector!
The Y-Ball Magnetic Puzzle is the perfect creativity tool for innovators, artists, engineers, writers, students, and you!
This classic desk toy will keep you amused!
This project book and sample kit introduces you to shape-memory alloy technology!
This mirascope creates a 3D hologram image!