Re: Timer on reduced-frequency circuit

[lark@xxxxxxxxxxxxxxxxxxx (Lacustral)]

Sam Goldwasser (sam@xxxxxxxxxxxxxxxxxx) wrote:
>Lacustral <lark@xxxxxxxxxxxxx> writes:

>> I'm thinking of using a variable speed control and a timer in series.
>> Would a timer have trouble with the lowered frequency electricity from the
>> speed control?  WOuld an electronic timer run OK that way?

>I assume you mean a common thyristor phase control, not one that actually
>changes the frequency of the power, though the same comments apply.

Probably.  A guy at an electric store said it changes the frequency, which
sounded weird to me.  But no, it would be an ordinary speed control.  I
vaguely remember reading about phase affecting power delivery in a physics
book.

>If you mean put the timer first which plugs into a wall socket and then the
>switched output of the timer goes to a variable speed control, there should
>be no problem.  The timer will run off the unmodified power.

I see - that makes sense.

Thanks
Laura