2.2M views · 29K reactions | Take a look at this  It's a plasma toroid - a glass globe evacuated and filled with xenon. A coil is placed around the globe with a high frequency current (10 million cycles per second) The current excites the plasma inside the globe, but due to the coil's magnetic field, the plasma is confined to a torodial space, forming a plasma toroid. | Royal Institution of Great Britain | Facebook

343 reactions · 58 shares | Create your own DIY Arduino based toroid coil winding machine at home.  | Crafty Engineer | Facebook

2.2K reactions · 452 shares | ax²+bx+c=0（a≠0） sin cos ax+by=c Real Powerful #Calculator! Not only doing simple mathematics but also solving equations for you! Now Free to download!!! | Sungy Mobile | Facebook

1.1M views · 233 shares | Meet Mohammad, the human calculator with...