[SML] Dimming a 24vac load

[billn at peak.org]

> Why does it need to be AC?  Incandescent lamps should work with DC, as
> well.  Presuming the lamps are not terribly costly, try connecting one
> to 24VDC and see what happens.  If it works, then a simple DC PWM dimmer
> will do a fine job.

That may not tell the whole story. There could be a transformer (or other
electronic interface) in the system to step the line voltage down to 24 volts.
The question would be how such component(s) might react to a PWM or other
dimmer.

Bill