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Re: [PSUBS-MAILIST] Rudder angle indicator
Would the Hall-effect device electric scooter twist grip control have
any advantage over the MagnetoPot?
Jim,
don't know without any individual unit being sited.
The beauty of this magnetopot is its simplicity & ability to be pressure
proofed very easily.
I looked at hall effect switches earlier, but was put off by the prices I
saw.
Alan
----- Original Message -----
From: "Jim Rudholm" <jimrudholm@gmail.com>
To: <personal_submersibles@psubs.org>
Sent: Friday, March 26, 2010 3:52 AM
Subject: Re: [PSUBS-MAILIST] Rudder angle indicator
Group,
Jim R.
On Thu, Mar 25, 2010 at 12:08 AM, Alan James <alanjames@xtra.co.nz> wrote:
Hi all.
My magnetopots ( magnetic potentiometers) arrived today & I was wrapped
with
them.
The rotary magnetopot was described by Digi-key as 46mm diameter.
It was actually 65mm, which means it can fit larger shafts. The internal
hole
which is 26mm can also be bored out to 35mm to fit a larger shaft.
All I had to do to water / pressure proof them was to glue a flat cover on
the front.
I did this because I noticed the front was slightly spongy over the track
area.
The wires coming out of it also need potting.
Photos & description are on the projects page.
http://www.psubs.org/projects/1235435392/positionsensor/
Jens, my motors will be rotating through 180 degrees so the potentiometer
will only be moved
through 5k not 10k. My preferred range is from 7.25k to 2.25k but I can do
any 5k range from
10 to 0. How does that work out with your LED indicator? The linear pot
will
be going through
the full 10k resistance range so that should be OK with your currant
circuit.
Can I have your schematic for that??? & what would be entailed for it to
work through the 5k
range??
Here's where you find these magnetic pots.
http://search.digikey.com/scripts/DkSearch/dksus.dll?Cat=1967210&FV=fff4001e,fffc0389
Regards Alan
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