You could use a seconds sensor as reference or pick out a resistor that would give you a good 40f temp rise above ambient.
-Jerry > On Dec 4, 2014, at 1:39 PM, Nathan McCorkle <[email protected]> wrote: > >> On Thu, Dec 4, 2014 at 12:38 PM, Jerry Biehler <[email protected]> >> wrote: >> You could also use a resistor thermally bonded to a thermistor or a Dallas >> 1wire sensor. You apply voltage to the resistor to make it a little heater >> and when the temp rises significantly on the sensor you know it is out of >> water. You don't need much heat, just enough above ambient to notice a >> difference. > > What happens when the house thermostat set at 80 (ok let's say 70) > goes down to 55 at night? > _______________________________________________ > dorkbotpdx-blabber mailing list > [email protected] > http://music.columbia.edu/mailman/listinfo/dorkbotpdx-blabber _______________________________________________ dorkbotpdx-blabber mailing list [email protected] http://music.columbia.edu/mailman/listinfo/dorkbotpdx-blabber
