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From:	Sam Fladung <samfladung AT gmail DOT com>
Date:	Mon, 17 Jun 2013 20:05:44 -0400
Message-ID:	<CAJwE16NCAM0jcB8iUUnpHCxiZWPgx0gXiCWcZt1v17i5u=x7_A@mail.gmail.com>
Subject:	Re: [geda-user] Reverse engineering suggestions
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Hi Rob,

How many of the wires from the switch connect directly into the motor? If
more than 2, there may be multiple taps on the motor winding to accomplish
the speed control. If this is the case, you could either rig up transistors
to try to switch power and ground to the various windings, or simply use
two of leads from the motor and vary the speed using the pwm methods
already suggested.

Regards,
Sam

On Mon, Jun 17, 2013 at 1:08 PM, Rob Butts <r DOT butts2 AT gmail DOT com> wrote:

> My thoughts exactly!
>
>
> On Mon, Jun 17, 2013 at 11:49 AM, Mitch Davis <mjd+geda-user AT hackvana DOT com>wrote:
>
>> On Mon, Jun 17, 2013 at 4:50 AM, Rob Butts <r DOT butts2 AT gmail DOT com> wrote:
>> > I want to modify a Minn Kota C2 30 bass type trolling motor.
>> > a twist handle to switch between 5 forward speeds and 3 reverse.
>>
>> Sounds like an application crying out for a small micro, PWM and a
>> couple of MOSFETs.  There are lots of circuits like this on the
>> internet.
>>
>> Mitch.
>>
>
>

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Hi Rob,<br><br>How many of the wires from the switch connect directly into =
the motor? If more than 2, there may be multiple taps on the motor winding =
to accomplish the speed control. If this is the case, you could either rig =
up transistors to try to switch power and ground to the various windings, o=
r simply use two of leads from the motor and vary the speed using the pwm m=
ethods already suggested. <br>

<br>Regards,<br>Sam<br><br><div class=3D"gmail_quote">On Mon, Jun 17, 2013 =
at 1:08 PM, Rob Butts <span dir=3D"ltr">&lt;<a href=3D"mailto:r DOT butts2 AT gmai=
l.com" target=3D"_blank">r DOT butts2 AT gmail DOT com</a>&gt;</span> wrote:<br><block=
quote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc=
 solid;padding-left:1ex">

<div dir=3D"ltr">My thoughts exactly!</div><div class=3D"HOEnZb"><div class=
=3D"h5"><div class=3D"gmail_extra"><br><br><div class=3D"gmail_quote">On Mo=
n, Jun 17, 2013 at 11:49 AM, Mitch Davis <span dir=3D"ltr">&lt;<a href=3D"m=
ailto:mjd+geda-user AT hackvana DOT com" target=3D"_blank">mjd+geda-user AT hackvana.=
com</a>&gt;</span> wrote:<br>


<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex"><div>On Mon, Jun 17, 2013 at 4:50 AM, Rob Bu=
tts &lt;<a href=3D"mailto:r DOT butts2 AT gmail DOT com" target=3D"_blank">r DOT butts2 AT gm=
ail.com</a>&gt; wrote:<br>



&gt; I want to modify a Minn Kota C2 30 bass type trolling motor.<br>
</div><div>&gt; a twist handle to switch between 5 forward speeds and 3 rev=
erse.<br>
<br>
</div>Sounds like an application crying out for a small micro, PWM and a<br=
>
couple of MOSFETs. =A0There are lots of circuits like this on the<br>
internet.<br>
<span><font color=3D"#888888"><br>
Mitch.<br>
</font></span></blockquote></div><br></div>
</div></div></blockquote></div><br>

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