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:date:message-id:subject:from:to
         :content-type;
        bh=E1FYD3E3xbpW72nsdBwfNJKxiEolnLX/10jPPH+y/Ec=;
        b=B25P9z6Gq4OyMIIrk2qM/WeoTuFm5vWgfa/Od8MuJPOp6MsE8UZU1Btfx88Xifkegy
         uZL0V1CoUqCiM8y6+bSm+8+zj8wkGq6jgtWQM+scPQZmakPXhg2W51MQlX9Wle9BirOa
         HUzM7XZh/WoX9hlcF6V3avTKwsQVjnID6PiuHQE/asxORCBJ5I/HUXI3tyedzOF35cFP
         THWuopdIGmRFSDfeHvM6/g1domSMOq37hymV1uZZLq5vQ88CmEWDTWxdxMjasplzyAzQ
         aBjAOFrDIarnw7Oyc42tpwh0kgfWR8fDA1ziKr5sFoSK6ihGdE9QbT2H9HvAUIOCDmjR
         RhTg==
MIME-Version: 1.0
X-Received: by 10.182.137.136 with SMTP id qi8mr20091292obb.51.1429651496999;
 Tue, 21 Apr 2015 14:24:56 -0700 (PDT)
In-Reply-To: <CALSZ9grp-uAzV703MiFSgkT9LO1cSRZPfoypQLLN5YW0=dj2Sw@mail.gmail.com>
References: <CALSZ9goH9CUT=5DStdVUG4d45ff30WieHc2-DsXpjX=7cf42Nw AT mail DOT gmail DOT com>
	<CAOFvGD7cf+csGuCJix3RHLp_4+V7S6mf9GG6ebnYs_A+F2UOHQ AT mail DOT gmail DOT com>
	<CALSZ9go=bXWdsLco1rWfNzpp-DwwDgJjFTwk4xdFN4jSvVYA0Q AT mail DOT gmail DOT com>
	<CALSZ9grp-uAzV703MiFSgkT9LO1cSRZPfoypQLLN5YW0=dj2Sw AT mail DOT gmail DOT com>
Date: Tue, 21 Apr 2015 17:24:56 -0400
Message-ID: <CAOFvGD6kprza6wEaw5yMqAFppouDLCe=nxVYxoRwVs5NxS63iQ@mail.gmail.com>
Subject: Re: [geda-user] Stepper driver issues
From: Jason White <whitewaterssoftwareinfo AT gmail DOT com>
To: geda-user AT delorie DOT com
Content-Type: text/plain; charset=UTF-8
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

On Tue, Apr 21, 2015 at 2:45 PM, Rob Butts <r DOT butts2 AT gmail DOT com> wrote:
> Are you able to make the stepper motor spin by manually applying
> voltage to each coil to step through the phases?
>
> I didn't think of this way but couldn't I just create my own driver with
> transistors and turn them on and off via the micro?

Yes you can.

 * For a bipolar stepper you would need two H bridges (one for each coil).
 * For a unipolar stepper you would need 4 drive transistors (one for
each coil).

Good luck,
Jason White