how it works

How does a vacuum tube work?

vacuum tube

A vacuum tube is transconduct device that is actually a sealed glass tube. Inside the tube, there is a set of carefully arranged gears which works for controlling electric current. Inside the tube, there is no air. Under the tube, there are wires that come outside from inside the tube. This is what you can

A guide to choosing the right lawn mower

Lawn mower

As with most things nowadays, when it comes to buying a lawn mower there’s certainly plenty of choice whether you’re buying online or in store. Much will depend on the size of your lawn, of course, as well as how much you want to spend and whether you want to settle for a cheaper push