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 mini single knife switch allows for a circuit to be live or to be turned off. Simply connect the ends of the circuit to the metal screw contacts on the switch and instantly you have a mechanical way of breaking and connecting a circuit.
This kit will get your paper plane ready for takeoff!
Build a hand that realistically moves its fingers using shape memory allow technology!
This quality Dobsonian style telescope features a 76 mm aperture reflector optical tube.
This is a great clean heat demonstration model for the classroom setting!
Create beautiful art with this amazing sun paper!
Comprehensive collection of 30 fossils.