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connector - How to tell polarity expected of a DC barrel jack? - Electrical Engineering Stack Exchan
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日期：2024-10-08
Well I have a $200 photo frame unit that needs a 12Vdc 2 amps power supply. The only clue I had was a tiny sticker that said 12vdc 2.0amps and the symbol __ and the ----- underneath. So after searching the internet, and finding nothing simple like oh the ...看更多
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