Re: Motor Circuit

Thanks Dave,

It looked like something that I'd have "parts-on-hand" to put
together without costing anything. Seemed worth a try for free.
I'll try it anyways, just thought someone might find it
interesting.

John

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "turbulatordude"
<dave_mucha@...> wrote:

>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "John Hansford" <kz1927@>
> wrote:
> >
> > Hi Jon,
> >
> > Yes, for a small DC motor, or universal. Hobby-type stuff.
> > Is the circuit any use for that? Can it be adjusted for say
> > a 300w DC motor? To drive a spindle. I use a trim router, but
> > it's too loud and dusty cutting MDF.
> >
>
>
> The first chip I looked at was the 2N4901 evidently, it is not a
> current part.
>
> I think If that is the case, then someone would need to go over the
> whole schematic and make sure every part is available and that each
> replacement is used with the properly sized supporting circuitry.
>
> I would think using the $10.00 manual router speed control from Homier
> would be a safer bet.
>
> I do like the idea of a feedback to maintain RPM though.
>
> Dave
>