alt.engineering.electrical

"James Sweet" wrote in message
news: $ @trndny04...
>
> wrote in message
> news: @ ...
>>> Just take it apart, I'm pretty sure it's just a "potentiometer"
>>> (variable resistor) so it would only have 3 leads, one from the external
>>> wire to the pot., one from the pot to the motor, and one from the other
>>> external wire to the other lead of the motor.
>>>
>>> Cut things off, plug the external leads directly to the motor.
>>>
>>
>>>
>> Unfortuantely it doesn't seem that simple. The speed control has what
>> looks like a some kind of semiconductor/IC (3 leads), a diode, and
>> maybe a fixed resistor in addition to the slide pot. I don't know if
>> they're doing pulse width modulation or what.
>>
>
> Of course it's not gonna be a pot, it would have to be far too big and
> burn up a lot of power. Instead they use what is essentially a light
> dimmer. The semiconductor you see is a triac, the diode is a diac to
> trigger it, if you just jumper together the right two pins on the triac,
> the motor will be forced on.
>
Don' it just hurt to the core, James ... ? !!! ;~)

Arfa