Group: alt.engineering.electrical
From: Claude Desjardins
Date: Sunday, September 09, 2007 10:22 PM
Subject: Re: how to bypass dremel tool internal variable speed control?

Claude Desjardins wrote:
> hillpc@ wrote:
>>> 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.
>>
>
>
> I doubt they have put a stepper motor in there, they wouldn't sell for
> 20$ each! -- You still should only have two leads coming out of the
> motor. Confirm?
>

Btw you said there was a IC ... how many pins does it has, can u give
out the ID (in case it's a bridge or something so your motor would be DC
(Uhm?!) and wouldnt be a great idea to plug it right into a wall outlet!