submersible motors details
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Posts: 46,084
Hi guys, thanks a lot for the support. I'm going to build a
submersible which will be used for 'shallow' water research. It will
probably be connected to a surface boat by an umbilical cord to power
and receive images from a digital camera which will be on the
submersible. I'm planning on using abasic stamp (which I have
experience with), or a PIC16Fxxx microcontroller if I can learn how
to use it in time (because it will be cheaper and a cool thing to
know how to use) to control three motors. Two will be longitudinal,
one vertical. I built h-bridges from diagrams on bobblick.com which
will let me power up to 40V DC motors from a 5V input signal (from a
microcontroller). I'm planning on building the pwm circuits on bob
blick's website too to allow speed control of the motors (although
I'm confused why I can't just send pulses from a microcontoller
straight to the h-bridge...). www.Bobblick.com might be useful to the
other guy using trolling motors (sorry, I forgot your name). I'm
wondering how to account for bouyancy equalization at different
depths, was thinking about using a scuba diving 'bouyancy
compensator' strapped to an air tank on the submersible, but that's a
bit ghetto..
.
--- In basicstamps@yahoogroups.com, "Bill Katakis" <bkatakis@a...>
wrote:
> can you tell us a little bit about what you want to build in the
way of a
> submersible vehicle??
> Bill
>
> Cure Cancer and Smallpox with your computer.
> It runs as a screen-saver Sponsored by Intel:
> http://members.ud.com/download/gold/
>
>
Original Message
> From: "Sam" <hard-on@t...>
> To: <basicstamps@yahoogroups.com>
> Sent: Thursday, May 29, 2003 4:47 PM
> Subject: [noparse][[/noparse]basicstamps] submersible motors
>
>
> > anyone know where to get cheap submersible motors that would be
water
> > proof down to several feet under water (eg >7 feet)? I heard that
> > bilge pump motors are water proof but I'm not sure up to what
depth.
> > I've heard of 'model airplane fuel pump' motors being used on
> > submersible robots too but I'm not sure about their power/depth.
> > Thanks everyone.
> >
> >
> > To UNSUBSCRIBE, just send mail to:
> > basicstamps-unsubscribe@yahoogroups.com
> > from the same email address that you subscribed. Text in the
Subject and
> Body of the message will be ignored.
> >
> >
> > Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/
> >
> >
> >
submersible which will be used for 'shallow' water research. It will
probably be connected to a surface boat by an umbilical cord to power
and receive images from a digital camera which will be on the
submersible. I'm planning on using abasic stamp (which I have
experience with), or a PIC16Fxxx microcontroller if I can learn how
to use it in time (because it will be cheaper and a cool thing to
know how to use) to control three motors. Two will be longitudinal,
one vertical. I built h-bridges from diagrams on bobblick.com which
will let me power up to 40V DC motors from a 5V input signal (from a
microcontroller). I'm planning on building the pwm circuits on bob
blick's website too to allow speed control of the motors (although
I'm confused why I can't just send pulses from a microcontoller
straight to the h-bridge...). www.Bobblick.com might be useful to the
other guy using trolling motors (sorry, I forgot your name). I'm
wondering how to account for bouyancy equalization at different
depths, was thinking about using a scuba diving 'bouyancy
compensator' strapped to an air tank on the submersible, but that's a
bit ghetto..
.
--- In basicstamps@yahoogroups.com, "Bill Katakis" <bkatakis@a...>
wrote:
> can you tell us a little bit about what you want to build in the
way of a
> submersible vehicle??
> Bill
>
> Cure Cancer and Smallpox with your computer.
> It runs as a screen-saver Sponsored by Intel:
> http://members.ud.com/download/gold/
>
>
Original Message
> From: "Sam" <hard-on@t...>
> To: <basicstamps@yahoogroups.com>
> Sent: Thursday, May 29, 2003 4:47 PM
> Subject: [noparse][[/noparse]basicstamps] submersible motors
>
>
> > anyone know where to get cheap submersible motors that would be
water
> > proof down to several feet under water (eg >7 feet)? I heard that
> > bilge pump motors are water proof but I'm not sure up to what
depth.
> > I've heard of 'model airplane fuel pump' motors being used on
> > submersible robots too but I'm not sure about their power/depth.
> > Thanks everyone.
> >
> >
> > To UNSUBSCRIBE, just send mail to:
> > basicstamps-unsubscribe@yahoogroups.com
> > from the same email address that you subscribed. Text in the
Subject and
> Body of the message will be ignored.
> >
> >
> > Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/
> >
> >
> >
Comments
unless you use external circuitry , and even then the circuit I saw has to
be refreshed occasionally? I'm using Al Williams pwm chip, which will pwm
for 8 motors if need be with no external circuits, just a line out to the
stamp to shift out instructions to the 3 different pwm lines to your
controllers. I don't think you will have to worry about buoyancy change at
the depths you are talking about,, 7'. ,, unless your vehicle is using a
compressible component like foam or something like that. You should
probably aim for neutral buoyancy, a state where the vehicle will stay at
the depth you place it at, that way you aren't kicking up sand off the
bottom with your thrusters to control altitude. If you need to be heavier
add weight,, bolt on or snap on something heavy to the bottom center of the
vehicle, if you need more floatation bolt it to the top of the vehicle. The
big boys use syntactic foam,, tiny incompressible, machinable glass beads,
but for you depth you can get by with just about anything that floats
without much compression. I'll check out the controller at the website,
maybe it won't be too hard to build? Don't know why you couldn't send
direct pulses, but if the controller uses fet's you can have problems doing
that without some protective stuff inline. Motors create a big spike when
they turn on and off I'm told, so any controller has to be protected against
that. Some put a diode across the leads of the motor, someone said that for
fet's the diode had to have a faster response. Correct me if I've botched
any of this please you guys.
Original Message
From: "Sam" <hard-on@t...>
To: <basicstamps@yahoogroups.com>
Sent: Thursday, May 29, 2003 8:52 PM
Subject: [noparse][[/noparse]basicstamps] Re: submersible motors details
> Hi guys, thanks a lot for the support. I'm going to build a
> submersible which will be used for 'shallow' water research. It will
> probably be connected to a surface boat by an umbilical cord to power
> and receive images from a digital camera which will be on the
> submersible. I'm planning on using abasic stamp (which I have
> experience with), or a PIC16Fxxx microcontroller if I can learn how
> to use it in time (because it will be cheaper and a cool thing to
> know how to use) to control three motors. Two will be longitudinal,
> one vertical. I built h-bridges from diagrams on bobblick.com which
> will let me power up to 40V DC motors from a 5V input signal (from a
> microcontroller). I'm planning on building the pwm circuits on bob
> blick's website too to allow speed control of the motors (although
> I'm confused why I can't just send pulses from a microcontoller
> straight to the h-bridge...). www.Bobblick.com might be useful to the
> other guy using trolling motors (sorry, I forgot your name). I'm
> wondering how to account for bouyancy equalization at different
> depths, was thinking about using a scuba diving 'bouyancy
> compensator' strapped to an air tank on the submersible, but that's a
> bit ghetto..
>
> .
> --- In basicstamps@yahoogroups.com, "Bill Katakis" <bkatakis@a...>
> wrote:
> > can you tell us a little bit about what you want to build in the
> way of a
> > submersible vehicle??
> > Bill
> >
> > Cure Cancer and Smallpox with your computer.
> > It runs as a screen-saver Sponsored by Intel:
> > http://members.ud.com/download/gold/
> >
> >
Original Message
> > From: "Sam" <hard-on@t...>
> > To: <basicstamps@yahoogroups.com>
> > Sent: Thursday, May 29, 2003 4:47 PM
> > Subject: [noparse][[/noparse]basicstamps] submersible motors
> >
> >
> > > anyone know where to get cheap submersible motors that would be
> water
> > > proof down to several feet under water (eg >7 feet)? I heard that
> > > bilge pump motors are water proof but I'm not sure up to what
> depth.
> > > I've heard of 'model airplane fuel pump' motors being used on
> > > submersible robots too but I'm not sure about their power/depth.
> > > Thanks everyone.
> > >
> > >
> > > To UNSUBSCRIBE, just send mail to:
> > > basicstamps-unsubscribe@yahoogroups.com
> > > from the same email address that you subscribed. Text in the
> Subject and
> > Body of the message will be ignored.
> > >
> > >
> > > Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
> > >
> > >
> > >
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the Subject and
Body of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>