magnetics - Magnet that needs power to turn off? Inverse coil? - Electrical Engineering Stack Exchange
Magnets with an OFF Switch
Superconducting magnet - Wikipedia
How do magnets that can be turned on and off work? - Quora
Switchable Magnet & On and Off Magnet, “How and What” You Wanna Know | HVR MAG
How does a magnetic base work? - Wonkee Donkee Tools
On / Off Magnets - YouTube
How does a magnetic base work? - Wonkee Donkee Tools
Magnets with an OFF Switch
Switchable Magnets for Robotics Applications
Magnets with an OFF Switch
Magnets with an OFF Switch
Innovative New Switchable Magnet invention and how it works. Why not build your own? - YouTube
Magnetic Chucks - Work Holding Systems | First4Magnets
Magnetic switchable device - Wikipedia
Magnets with an OFF Switch
A Permanent Magnet That Turns On and Off - YouTube
How to build a switchable magnet - YouTube
electromagnetism - How does a "permanent" magnet with switch work? - Physics Stack Exchange
DIY Magnetic Switch | LumberJocks Woodworking Forum
Magnets with an OFF Switch
Electropermanent magnet - Wikipedia
Magnetic switchable device - Wikipedia
Magnetic indicator arm
A Kid-friendly Introduction to Magnets and Magnetism | HowStuffWorks
