Help with Senior Design Project
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My senior design partner and I are working on building a water
sampler and need some technical advice on using the Basic
Stamp. The water sampler is being designed from a hobby type
electic boat and we have two extra radio control channels to use (4
channel radio). We would like to use a Basic Stamp to control up
to 4 selenoid valves, to turn on a small pump and to wind and
unwind a reel of hose. Any advice you have, even if it is a harsh
reality check, would be very helpful.
Montessa Young and Stephanie Hallock
University of Idaho BioSystems Engineers
sampler and need some technical advice on using the Basic
Stamp. The water sampler is being designed from a hobby type
electic boat and we have two extra radio control channels to use (4
channel radio). We would like to use a Basic Stamp to control up
to 4 selenoid valves, to turn on a small pump and to wind and
unwind a reel of hose. Any advice you have, even if it is a harsh
reality check, would be very helpful.
Montessa Young and Stephanie Hallock
University of Idaho BioSystems Engineers
Comments
I presume the boat motor is electric?
Sounds like you just program a sequence of events - once
the boat is stopped, unroll the hose (use an optical or
mechanical limit switch to get reproducible hose length
deployment). When the limit switch changes state (hose
deployed) start the pump - either for a fixed duration
or for a fixed volume - stop the pump, roll up the hose,
and be on your way. You really only need one input to
change state to start the entire sequence - giving you
one extra radio channel to use for launching torpedos :-)
Just add a servo with a magnet mounted to one arm and a
Hall-Effect switch on a BS input. Not high-tech, but it
should work.
Have fun!
Regards,
Arlen Fletcher
--
"They that can give up essential liberty to obtain a
little temporary safety deserve neither liberty nor
safety." - Benjamin Franklin
> My senior design partner and I are working on building a water
> sampler and need some technical advice on using the Basic
> Stamp. The water sampler is being designed from a hobby type
> electic boat and we have two extra radio control channels to use (4
> channel radio). We would like to use a Basic Stamp to control up
> to 4 selenoid valves, to turn on a small pump and to wind and
> unwind a reel of hose. Any advice you have, even if it is a harsh
> reality check, would be very helpful.
> Montessa Young and Stephanie Hallock
> University of Idaho BioSystems Engineers
>
>
>
receiver (instead to use a servo) and have it doing all timing and logic
sequences.
ACJacques
have to clear out the hose of the previous sample? I would think an air
pump to blow it out, or to pump for so long (overboard I hope!) to ensure
that the water in the hose has been flushed out
Original Message
From: <arlen.fletcher@a...>
To: <basicstamps@yahoogroups.com>
Sent: Tuesday, February 20, 2001 12:14 PM
Subject: Re: [noparse][[/noparse]basicstamps] Help with Senior Design Project
> What? No GPS system onboard!!??
>
> I presume the boat motor is electric?
>
> Sounds like you just program a sequence of events - once
> the boat is stopped, unroll the hose (use an optical or
> mechanical limit switch to get reproducible hose length
> deployment). When the limit switch changes state (hose
> deployed) start the pump - either for a fixed duration
> or for a fixed volume - stop the pump, roll up the hose,
> and be on your way. You really only need one input to
> change state to start the entire sequence - giving you
> one extra radio channel to use for launching torpedos :-)
>
> Just add a servo with a magnet mounted to one arm and a
> Hall-Effect switch on a BS input. Not high-tech, but it
> should work.
>
> Have fun!
>
> Regards,
> Arlen Fletcher
>
> --
> "They that can give up essential liberty to obtain a
> little temporary safety deserve neither liberty nor
> safety." - Benjamin Franklin
> > My senior design partner and I are working on building a water
> > sampler and need some technical advice on using the Basic
> > Stamp. The water sampler is being designed from a hobby type
> > electic boat and we have two extra radio control channels to use (4
> > channel radio). We would like to use a Basic Stamp to control up
> > to 4 selenoid valves, to turn on a small pump and to wind and
> > unwind a reel of hose. Any advice you have, even if it is a harsh
> > reality check, would be very helpful.
> > Montessa Young and Stephanie
Hallock
> > University of Idaho BioSystems
Engineers
> >
> >
> >
>
>
>
Check out http://divelec.tripod.com/rcic2/rcic-2.html
for a dedicated PIC that you can connect directly to your RC receiver. It
has 2 digital outputs for each channel (a total of 4). One that goes high
when the joystick is one side of center and one that goes high when it is on
the other side of center. In addition, it has a PWM output that you can use,
after filtering, for a 1 to 3 volt signal that is proportional to the
distance that the joystick is moved from center. It also has LED outputs you
can use to trim your RC channels to center as well as one to indicate
receipt of pulses. It would free up your BS2 to do other things at the same
time.
Carl
Diverse Electronic Services
Original Message
From: Montessa Young <mets0786@u...>
To: <basicstamps@yahoogroups.com>
Sent: Tuesday, February 20, 2001 1:39 PM
Subject: [noparse][[/noparse]basicstamps] Help with Senior Design Project
> My senior design partner and I are working on building a water
> sampler and need some technical advice on using the Basic
> Stamp. The water sampler is being designed from a hobby type
> electic boat and we have two extra radio control channels to use (4
> channel radio). We would like to use a Basic Stamp to control up
> to 4 selenoid valves, to turn on a small pump and to wind and
> unwind a reel of hose. Any advice you have, even if it is a harsh
> reality check, would be very helpful.
> Montessa Young and Stephanie Hallock
> University of Idaho BioSystems
Engineers
>
>
>
>
If you haven't received the precise help you need please contact me off list.
If I can control a train I should be able to help control a boat.
Sid Weaver
Newzed@a...