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Wiring a DC socket - why three pins? - Electrical Engineering Stack ...
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日期：2026-04-20
26 Feb 2011 ... I have a DC power supply which has a positive tip polarity. ... When you plug in
the socket pin 1 & 2 would provide the power to the circuit ... is for the outer
connector of the barrel portion of the jack (rather than the center pin...看更多
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