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Hi, I have basic knowlege in electicity. I bought a adaptor that clips on a 18v milwakee tool battery that as a port that delivers 12v. The thing is that if i test it , I get 4.4v , but if i touch both polarity it jumps ton 12,3v ,I can let go , it stays at 12.3v. Same with a led strip, plug, nothing, but when I touch both polarity it light up and stay light even when im not touching anything. Either there is something I dont know ( very possible) or the adaptor is not working correctly. I dont really know where to get help, everything is closed where i live. Sorry english is not my first language, hope im clear in my description. Thanks Pascal |
January 13, 2021 |
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I will take a guess and say that there is some smarts built into the adapter that turns on full voltage only after it gets a bit of current at 4.4v. Only guessing |
January 15, 2021 |
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There is something not really making sense to me. You say that "but when I touch both polarities", that implies that, before, you didn't ? Then, how do you test 4.4v just touching ... ONE ... polarity (one pole, I assume)? A VOLTAGE is ALWAYS a difference of electrical tension between two points. If you use a voltmeter, one probe on a pole an the other probe hanging in air, you are measuring who knows what. Note that maybe it is just me who does not understand what is evident, though. |
January 16, 2021 |
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