Re: [PSUBS-MAILIST] Alarm on oxygen sensor

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

Hi Jens,
Yes that's the analyzer. I've got Vance Harlows book but it doesn't have the alarm
addition or schematic. I may have seen it on the Oxycheq site but can't find it there now.
> From memory it was a simple addition to the panel meter, & fairly idiot proof.
Will see if anyone knows of the schematic, if not will check with Oxycheq, & if no joy
will have to look at the voltage comparator & sort out a circuit.
Thanks
Alan

----- Original Message ----- 
From: "Jens Laland" <laland@artematrix.org>
To: <personal_submersibles@psubs.org>
Sent: Tuesday, February 08, 2011 9:16 PM
Subject: Re: [PSUBS-MAILIST] Alarm on oxygen sensor


> Alan
>
> Something like this?
>
> http://members.cox.net/bee2/
> http://members.cox.net/bee2/ICL7106.htm
>
> Also, use a standard op-amp as a voltage amplifier to raise the said
> millivolt DC "signal" (O2 level) up a bit, and finally, a voltage
> comparator would give you a signal whenever the O2 level reaches a
> preselected low level (similar to what we discussed when playing around
> with rudder indicator ideas).
>
> Best regards,
> Jens Laland
>
>
>
>
>
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