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icubob(at)gmail.com
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 Posted: Tue Mar 01, 2011 7:55 am Post subject: remote cell phone switch |
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hi all,
one last blurb on this thing. remember i built from a kit for $15. this will be used to preheat my engine and for now i am preheating my shop in the hangar. my plane is built and is being reassembled for the last time. i use a heating system with no motors to burn out or be stopped my a mouse nest. i set the cell phone to stay lit for 3 minutes, not much chance of a wrong number to be dialed again 3 minutes after the first. i also put a timer in the line that powers the board so it would be turned off in the night if it did happen to be turned on.
initially i did have problems with the cell phone lighting up and turning the preheat off. one lighting will turn off the relay. the phone lights every time power is resupplied thru the charger. it seems that when the chaarger is in the cold [say 5-10 deg. f.] or less [lots less here in n. wi.] it stops sending current completely and when more current is called for it starts the flow and that turns on the cell light, turning off the relay if it was on. so...........now the whole thing is in a styrofoam cooler [very effecient, got it from the blood bank!] and a 4 watt night light keeps the temp 50 deg. f. above outside air temp. a thermostat from a junked space heater was wired into the line of the 4 watt bulb and now it is a constant 65 deg.in the cooler. no phone light ups now because of charger current interruption... it is reliable.
fwiw........ down to 20 below i keep a cooler for food in the hangar at a constant 40 deg. with a 15 watt bulb and an inline thermostat. gotta have water for the coffee pot and soup for the microwave!
bob noffs
[quote][b]
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nuckolls.bob(at)aeroelect
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| Posted: Tue Mar 01, 2011 8:03 am Post subject: remote cell phone switch |
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. . .now the whole thing is in a styrofoam cooler [very effecient,
got it from the blood bank!] and a 4 watt night light keeps the temp
50 deg. f. above outside air temp. a thermostat from a junked space
heater was wired into the line of the 4 watt bulb and now it is a
constant 65 deg.in the cooler. no phone light ups now because of
charger current interruption... it is reliable.
fwiw........ down to 20 below i keep a cooler for food in the
hangar at a constant 40 deg. with a 15 watt bulb and an inline
thermostat. gotta have water for the coffee pot and soup for the microwave!
Good show! Rube Goldberg would be proud of you!
Bottom line is that it works to design goals.
Bob . . .
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