SPNO or SPNC relay

In this article, we will take a detailed (but not too detailed) look at the electrical principles that allow us to detect the presence of a human finger using little more than a capacitor.

Robotic floor cleaners have been available as consumer products for a number of years now but with a gradual drop in production cost and development of new technology, these cleaners are becoming cheaper. In this teardown we will look at a Robotic Floor Cleaner which uses "electrostatic forces" to remove dust and can clean a room with its "intelligent" obstacle navigation.

A new breakthrough in nanoscale heat transfer may redefine what was once thought possible by conventional thermal radiation laws.