Quote: (Originally Posted by
Scubascooby)
This is an intersting discussion. I own a Classic KISS so I can only comment from a techinical viewpoint.
IMO firing the solenoid in a low battery situation and so killing the controller is very undersirable since it leaves you without control and probably no injection either.
I am not sure why the solenoid is set to fire at boot-up, part of the test sequence ? Is it really necessary ? Maybe the simple thing would be to bleep and ask the user if they would like to fire the solenoid ? If the chooses "No" then it goes to the menu and allows them to switch the solenoid "off" or to a low set-point.
If the controller has died and rebooted then the elapsed time may have been enough to cause a drop in ppO2 requiring an injection in any case to maintain setpoint but is it likely that they are going hypoxic ? That's a double failure.
I like the suuggestion of using a high drain battery for the solenoid and a long life battery for the controller.
Using seperate batteries is not really necessary, there are alternate solutions.. As kevin and a few other people know, I have been developing and trying my own contollers for several years.. Overall I like the HH and dive it.. Eventually I will switch to my own controller (which will never be fror sale).. I know my electronics, but my mechanical engineering skills have much to be desired..
My current design uses 2 batteries per "handset'.. the primary in each is a RECHARGABLE li-ion, the backup is a li-socl2 cell (although an ordinary aa would work).. I have a sophisticated battery monitoring/control system, that constantly monitors the power sources and switches to the backup should the primary be to weak or glitch.. once in the backup, there is an indication... from this point on, it would run on this cell unless the primary recovers.. In this type of arrangement alot of the limits genesis and myself were debating aren;t really necessary, since you really need a double failure now which is much less likely..
My design could never really be a commercial product (unless it was sold in the price range of the CIS) since it would be too costly to manufacture plus its getting quite large (the ps alone is about the size of the entire HH ckt board!) even using the smallest surface mount components.. Its quite quickly becomming a Brick in size (but this gives me room for a much larger display)..