X-Authentication-Warning: delorie.com: mail set sender to geda-user-bounces using -f X-Recipient: geda-user AT delorie DOT com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :content-type; bh=RPzpx4tUMPv2mLOYpog9T3sbgUTzmWs7fjioinRI8kw=; b=pD0TL4drpjBXGEM5ckrsM1rAL5lnOb3EwgO5tmtliKlDXQ5c2T6DsolgaPnvmUSBdH IgJUNONPopilBAuDXBJMdhcw0Cy9G68a/r3b73eu1pmnAAN6hJeZE+rAV19LDLYbM36U oXPVsJxW23NR9aSSOCssNWhwk3DyknwgKijCJInl7E0mSVGck1rGHWnODTgsEmqvB62e AtSqQ6SfAR5xc7xOFfQZO3AB2AxgxwacuVrAVB4LD3A95/ohbnHz0yQu9WVS5kZME7sB +wfTgM6aBaV8db6przdDng2pRWuBj0I7HCGhM2b/h00VNw18GXLalkwT6TWHavnO033T Q7LQ== X-Received: by 10.50.56.50 with SMTP id x18mr6434503igp.87.1371513984956; Mon, 17 Jun 2013 17:06:24 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: References: From: Sam Fladung Date: Mon, 17 Jun 2013 20:05:44 -0400 Message-ID: Subject: Re: [geda-user] Reverse engineering suggestions To: geda-user AT delorie DOT com Content-Type: multipart/alternative; boundary=089e0153899ce0c0d304df627b99 Reply-To: geda-user AT delorie DOT com Errors-To: nobody AT delorie DOT com X-Mailing-List: geda-user AT delorie DOT com X-Unsubscribes-To: listserv AT delorie DOT com Precedence: bulk --089e0153899ce0c0d304df627b99 Content-Type: text/plain; charset=ISO-8859-1 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 wrote: > My thoughts exactly! > > > On Mon, Jun 17, 2013 at 11:49 AM, Mitch Davis wrote: > >> On Mon, Jun 17, 2013 at 4:50 AM, Rob Butts 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. >> > > --089e0153899ce0c0d304df627b99 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable 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, o= r simply use two of leads from the motor and vary the speed using the pwm m= ethods 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 Mo= n, Jun 17, 2013 at 11:49 AM, Mitch Davis <mjd+geda-user AT hackvana.= com> wrote:
On Mon, Jun 17, 2013 at 4:50 AM, Rob Bu= tts <r DOT butts2 AT gm= ail.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 rev= erse.

Sounds like an application crying out for a small micro, PWM and a couple of MOSFETs. =A0There are lots of circuits like this on the
internet.

Mitch.


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