Richard,

The problem is the Ray Allen G207 control stick that I have only has
provisions for a 2 amp SPST switch..

Thanks,
Jeff

"Richard Lamb" wrote in message
...

A simple 10 amp double pole double throw switch (preferably spring
loaded to center off position) will do the job nicely for about $10.

The center terminals of the switch (the 2 common pins) will be wired
to the motor - one from each terminal.
Those are the only wires to the motor.
Call this the "output" from the switch.

On the outter terminals of the switch, +12 and ground on one pole and
ground and +12 on the other. Note that the voltages are reversed.

When the switch is pressed one way the motor gets +/-.
When the switch is pressed the other way the motor gets -/+.

That will provide basic functionality.

If you want pilot and co-pilot stick inputs and a priority override,
it will take relays (plural) and a lot more head scratching.

Leo wired up the trim on his Zodiac this week.
His system has all that and a co-pilot disable, and rate adjustment too.
He just bought the commercial modules and wired it up per instructions.

Lo and behold, it works as advertised.


Best of luck.

Richard

Jeff wrote:

Jay,

I am not totally set on using a relay. As you can tell from my post, I
am
not an electrical engineer by any stretch of the imagination. I can
wire
things up and am very comfortable with stuff like that, I just need a
little
nudge in the right direction. Please tell me more about what an
H-Bridge
is.

Thanks!!

Jeff

"Jay" wrote in message
om...
Unless you're in love with relays, you could use a solid state
solution such as an H-Bridge. One thing you're going to want to think
about in your system is when you turn off the juice to that big motor,
it's inductance is going to generate a large voltage spike. So you'll
want some way of absorbing that other than channeling into into your
radio equipment and pitting your relay contacts.

Regards

"James R. Freeman" wrote in message
...
Jeff:
To do it right , I would use 2 of this type of relay unless You
are
sure
the SPDT switch can handle 5 amps D.C. in the long term. You may
contact
me
off list for wiring details either wayfor wiring details.

remove the no-spam
Jim
"Jeff" my last name @fidnet.com wrote in message
...
I have a 12v DC linear actuator, it just has 2 wires coming from
the
motor.
If I connect the red wire to the positive terminal of the battery
and
the
black to the negative, the motor extends. When I reverse the
wires
the
motor retracts. The motor draws about 5 amps. Pretty straight
forward
even
for an electrical dummy like me :)

I have a grip for my control stick that has a 3 position switch to
control
this motor. It is an ON-OFF-ON SPST switch that is capable of
about 2
amps.
So I went down to Radio Shack and bought a DPDT 12v relay part
number
275-218. Here is the Radio Shack web site for this relay:
http://www.radioshack.com/searchsku.asp?find=275-218

I need some help wiring the thing up so I can use my motor. Which
wires
go
where? Did I get the right kind of relay?

Thanks,
Jeff