- Yep, solenoid typically means a magnetic device with moving plunger.
However, in this case the term solenoid was used to describe
a "doughnut" shaped coil. By using sinuswave shaped AC you create a
pulsing magnetic field around the solenoid. Where my knowledge ends is
how to create such AC and how to size that solenoid in order to create
--- In firstname.lastname@example.org, "Anthony Athawes"
> The normal solenoid is a coil with a moveable core and a return
> are more effective than AC. We need to know whether there isa "plunger" or
> just the generation of eddy currents. This exhausts my knowledge ofthe
> subject, but, if I were experimenting, I'd start with the ubiquitous555
> timer chip to vary the frquency of vibration.
> Back to Rum.
> Tony A