Inside every VFD is a filament, grid, and cathode – three simple elements also found in the triodes of just about every tube amp ever made. By applying a small voltage to the filament ...

This recent installment of the EEVblog reverse engineers this VFD. The function of these displays is pretty easy to understand, and [Dave] covers that early in the video after the break.

What is a variable frequency drive? Heating, ventilation, and air conditioning systems' air supply used to be constant volume into a space. Now a variable air volume control is being used to provide ...

A fire on Chapman Highway caused lane reductions, with Seymour VFD responding to the scene involving a structure and vehicles ...