Quote:
Originally Posted by strider3700
Ran into an interesting problem while getting temperature sensors to the two kids bedrooms...
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If it's not something obvious like an open connection, you might be picking up noise from the AC wiring in your house.
Long low-voltage audio runs have to contend with this all the time. Microphones that have long lines use a "balanced" cable that has twin conductors inside a ground shield. Regular balanced microphone cable can get pretty expensive, but I have seen a version of it that is about 1/8" in diameter.
Might help you out.
-AC_Hacker