He had some latching Hall effect sensors lying around, but lacked the ring magnet that is usually used with such sensors in magnetic encoders. But luckily, he had a mess of magnetic spheres ...

The fusion reactor’s electromagnetic “heart” is complete, bringing us one step closer to clean, infinite energy—though ...

[Nick]’s zen rock garden uses a magnet to draw a ball bearing across ... Power is supplied through a slip ring in the base, and the table is controlled through Bluetooth. After the break you ...