X-Authentication-Warning:	delorie.com: mail set sender to geda-user-bounces using -f
X-Recipient:	geda-user AT delorie DOT com
X-Original-DKIM-Signature:	v=1; a=rsa-sha256; c=relaxed/relaxed;
	d=gmail.com; s=20161025;
	h=mime-version:from:date:message-id:subject:to;
	bh=6Clu8FHEj56nQc7tpmdzUlqJ5ePIQTvbEsYkadF6y2Y=;
	b=vW0WTKbs6PBLbvOXQ1zoIPDTyg+IyndrdE+ENnS3IsvYY2shNB2hapn7UEmgoF/8lU
	MJGy7TJGoY/H78hM/dlrj5m69zDuz524LxTDv8GirI+1jzdGiWZdkrKLa5IcxkRAcxqp
	Rg3TlOSTBUwzjDESetNiFR7KKIfiH27ka/Km9IMov7w5weQ31ce0ePbJEgnorWHm7piR
	uqTIdWmqCWGlrHWwNbWXQzkr7+eh+iJn2TOsQUTGaEHiR0Aw+eNsahEbBf1pdb/Wy+cv
	5i2kc3bS7QT0as+L7HBV1CtIIe+uetvvHSRbVZbzL20XD/cMxQEV+IvPRvXMNoE3vrCf
	SpVA==
X-Google-DKIM-Signature:	v=1; a=rsa-sha256; c=relaxed/relaxed;
	d=1e100.net; s=20161025;
	h=x-gm-message-state:mime-version:from:date:message-id:subject:to;
	bh=6Clu8FHEj56nQc7tpmdzUlqJ5ePIQTvbEsYkadF6y2Y=;
	b=hMMQveC4Izw1NXJuKqV9Hp6NKuR6EyEpsoL4i6CUGxrS8hxtFsclSQBzEcKElGzs0N
	ieWkykH9tRWZLSdlDuFd2krYs9FXGuu9vS9Gs4MZ8pEloEOw4IqRi70KFZITOsyao9cM
	Og4x1JfpGF9oMylqgzvImZ4afYXUZQ8G/oO7JgycAgNkY11bAJepGDfW/U4jvGWdRlvt
	EQQ4SRGrjSe118qF1ck81Ja8PwsBBdS3z1vjwa7xMpEeUG2qvzJ0fsVekXUbaxy3sPeZ
	POUntHXVmeRzsFD01rf/Whb5/mD0qFfwbqsut3TRrmIa/K8ZeSXfzW1fEq9NB3kUpT3E
	91iw==
X-Gm-Message-State:	AHYfb5hvE3YVm4wuiul1QLXhPXta/IZD9Tj2N2ivGqU+ci19WdRhVMpU
	Bx6cXJUMF5hOs36iKLjthllwnXydVmYX
X-Received:	by 10.176.27.111 with SMTP id n47mr14440883uai.120.1502629924103;
	Sun, 13 Aug 2017 06:12:04 -0700 (PDT)
MIME-Version:	1.0
From:	"Rob Butts (r DOT butts2 AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
Date:	Sun, 13 Aug 2017 09:12:03 -0400
Message-ID:	<CALSZ9grq+2WFyvJuYOUJXz5w21SsLbH8iz0aba2MzxtH=W+Qsg@mail.gmail.com>
Subject:	[geda-user] Mechanical relay using mosfets?
To:	geda-user AT delorie DOT com
Reply-To:	geda-user AT delorie DOT com

--f40304366278daec420556a24a88
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

I have a trolling motor (without schematics) that has 4 wires (black,
yellow, red and white) to the motor windings powering the propeller.  Here
is the power table (+ & - are the 12V battery posts:

Gear    Motor Position    Rotational Contacts             Forward/Reverse
Contacts
5                150=C2=BA              + to yellow, red & white
 - to black
4                120=C2=BA              + to yellow & red to white
- to black
3                 90=C2=BA               + to yellow and white
  - to black
2                 60=C2=BA               + to white and red to yellow
- to black
1                 30=C2=BA               + to white
          - to black
off                0=C2=BA                no contact
         + and - open
rev 1           -30=C2=BA              - to white
         + to black
rev 2           -60=C2=BA              - to yellow and white
 + to black
rev 3           -90=C2=BA              - to yellow, red and white
+ to black

At gear 5 the motor is drawing 30 amps.  I have 40 amp relays but they are
big (1" x 1") and they drastically increase the size of my circuit board
where I need 10 of them.

I was thinking of using high current mosfets as the relays however since
I'm connecting in some cases one motor wire (red) to another motor wire
(white) how do I operate the gate? Can I use a 5V micro?

Using mosfets would drastically reduce my real-estate and longevity but I'm
not seeing how to do it with mosfets.

I'd appreciate any suggestions.

Thanks

--f40304366278daec420556a24a88
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: base64
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--f40304366278daec420556a24a88--

- Raw text -