Re: TI-H: Temperature sensor fix
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Re: TI-H: Temperature sensor fix
> Date: Wed, 03 Dec 1997 08:37:27 +0000
> From: "Matthew H. Fogle" <cs239ac@chicoma.la.unm.edu>
> Organization: S.P.O.T. Enterprises
> To: ti-hardware@lists.ticalc.org
> Subject: Re: TI-H: Temperature sensor fix
> Reply-to: ti-hardware@lists.ticalc.org
> You're using the wrong cap if you have to do this... What size are you using. My
> sensor's ALL work fine from the start like they should...
>
> scross wrote:
>
> > For all of you who have been having trouble with the temperature sensor, I
> > have an answer.
> > I was having the same trouble as anyone. It would read freezing if I didn't
> > use a capacitor, and say it couldn't find the chip if I did.
> > The solution: Start up the program using no capacitor, and put the
> > capacitor in after it says freezing. Maybe a reset switch could be added?
I'm the designer of the circuit, and if you use the appropriate cap
sizes, then it should work fine. I have tested it with a 2.2 uF, 10
uF, and 100 uF caps and all worked fine. Remember, the cap stores
power to power the chip from the clock and data lines. If the cap is
too small, then there won't be enough power stored to power the chip.
Ed Plese