Re: [PSUBS-MAILIST] CO2 scrubbing measurement

["Alan James" <alanjames@xtra.co.nz>]

Jens,
that looks familiar to our position sensor circuit.
It wouldn't be too hard to do. I think I'd want
my circuit on all the time, it wouldn't take much power to
run an LED.
Alan

----- Original Message ----- 
From: "Jens Laland" <laland@artematrix.org>
To: <personal_submersibles@psubs.org>
Sent: Wednesday, June 09, 2010 9:54 PM
Subject: Re: [PSUBS-MAILIST] CO2 scrubbing measurement


> Alan
>
> Here is a short summary on how I would like to build my prototype based on
> the said document, and without any patent restrictions:
>
> [1] A few thermistors, i.e. temperature sensitive resistors (25 cents
> each), will provide a voltage drop that directly relates (non-linear) to
> temperature.
>
> [2] Then I would have to change out all the "threshold reference"
> resistors (4 or 5 ?) in an already built circuit I have, ref the
> NON-LINEAR one, visible to the left in the following video, ref
>
> http://www.youtube.com/watch?v=Df5DEqrguyM
>
> [3] Using a combination of GREEN, YELLOW, ORANGE, and RED colored diodes
> in the 4 ea. LED Array, would then give you a fancy indication of CO 2
> absorbency remains.
>
> [4] Save valuable battery power by adding a push button (the type that
> returns to OFF when released), and press it to get an instant reading.
> No interpretive mathematical algorithms are required.
>
> Best regards,
> Jens Laland
>
>
>
>
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