The way we control the speed of fan motors or pump motors has tremendously changed in the past two decades with the introduction of variable-frequency drives (VFDs), aka variable-frequency controllers ...

Breakthrough from 'Interference Source' to 'Pure Reference' The non-partial discharge variable frequency power supply creates ...

MARION COUNTY, Miss. (WDAM) - Residents in the district protected by the Tri-Community Volunteer Fire Department in Marion County may notice some discoloration in its water over the next few weeks.

VFD displays are beloved for their eerie glow that sits somewhere just off what you’d call blue. [mircemk] used one of these displays to create an old-school VU meter that looks straight out of a ...