Re: Light bulb power control/dimmer

Don Klipstein wrote:

I remember an electrical engineering lab day in college many years back.
One thing to be tried was to adjust the horizontal sweep rate of an
oscilloscope to the point where with no vertical signal the trace barely
did not visibly flicker. Maybe sweep was triggered externally, because
this was to determine sweep repetition rate for the trace to borderline
visibly flicker and not flciker.

Most of my classmates got frequencies in the 40's and low 50's of Hz for
this.


That experiment would be affected by the choice of phosphor on the
scope's CRT. I've had some with very fast phosphors, and some that took
over 10 seconds to fade.


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida
.

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