At 10:40 AM 2/7/02 -0600, you wrote:
>I use the watchdog.  Set it for max delay (around 2.3 seconds nominal) and
>go to SLEEP.  The watchdog will wake you up.  In mine I do two consecutive
>SLEEPs, so I get a new reading a little more than once every 5 seconds.
>
>Of course this won't do you a lot of good if you need to log anything
>resembling an accurate timestamp, but I have gotten several months out of
>three AA cells this way.  Mine was a 16F84 and DS1620, by the way - I
>think a 1620 would be fine with a slow clock, and it's only two more pins
>than an 18S20 and simpler software.

ISTR someone came up with a clever way of calibrating the WDT so that you
could get better accuracy without resorting to an external RTC.

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the reward"
speff@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com
9/11 United we Stand

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