Parallax power supply noise model 555
The Parallax power supply converter has worked flawlessly for the last 7 seven years. Now when a light 12volt is on, you can hear a high pitch noise come out of it. Looked at some other sites said...
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I watched a you tube video of a guy changing out the unit. Looks easy. I thought when I opened the cover that the circuit breakers, converter were all one unit.. Now i realize the converter is wired in between 12v and 120v.
One other question: The amps of the unit only refer to how fast or how much power goes to re-charging the batteries?
One other question: The amps of the unit only refer to how fast or how much power goes to re-charging the batteries?
