[PSUBS-MAILIST] Compass Choice

[Alan James]

Hi Jon,
it doesn't look like it does what I thought it did.
The software provided seems to be just a demo.
I was hoping it was something I could plug in & voila, I had graphics
of a compass on a screen.
G.L. seems to require a duplication of a lot of the monitoring equipment
as well as alarms for everything, so I'll continue going through the manual 
till I know exactly what I need, then look at my options.
Perhaps we could develop a G.L. & ABS compliant module as a Psubs
 group project???
It could monitor battery levels & amp draw, ballast levels, control & monitor 
the O2 delivery system & CO2 levels, incorporate the digital compass &
display cabin pressure etc.
Alan



________________________________
 From: Jon Wallace <jon.wallace at yahoo.com>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
Sent: Wednesday, January 15, 2014 11:00 AM
Subject: Re: [PSUBS-MAILIST] Compass Choice
 


Alan,

I am aware of that one as well.  They have a model that talks "serial" which means it could interface with a microprocessor like the arduino.

Any three axis tilt compensated IC compass will also provide yaw, pitch, and roll in addition to compass readings.  Scott Waters was lucky enough to pick up one of the last HMC models from Honeywell which I coded up for him.  Honeywell is no longer making that particular model but it was highly accurate and only cost $150 with the breakout board.  Remaining Honeywell models are in the near $400 (US) price range.

Jon


--------------------------------------------
On Mon, 1/13/14, Alan James <alanlindsayjames at yahoo.com> wrote:

Subject: Re: [PSUBS-MAILIST] Compass Choice
To: "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
Date: Monday, January 13, 2014, 10:45 PM

Hi
Jon,I
found this off the shelf unit for $250- (made in USA) It is
designed for marine applications&
has yaw, pitch & roll which is a G.L. requirement. So
it's looking attractive.http://www.ocean-server.com/compass.html
It looks like I would have to
run it off a computer though, which I didn't want to
do,but may be forced down this
path. Alan


      
  From: Jon Wallace
<jonw at psubs.org>
  To: Personal
Submersibles General Discussion
<personal_submersibles at psubs.org> 
  Sent:
Tuesday, January 14, 2014 2:09 PM
  Subject: Re:
[PSUBS-MAILIST] Compass Choice
    

A tilt-compensated electronic compass
(three axis, plus three axis 
accelerometer)
would work connected
  to a small microcontroller like the 
Arduino UNO.  The HMC6352 was the standard
but Honeywell stopped 
producing them. 
There are others however but probably more expensive. 

The display could be a nice four digit LED
(under two inches).

Jon

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