Pins on a DC power jack - Electronic Circuits Projects Diagrams Free

dak246 · 21st October 2004, 03:27 AM

How do i connect the pins on a DC power jack? Im upgrading from using a battery, and the power jack i have has 3 pins on it. The power supply im plugging into it has a positive center and negative outside. On the jack, the inside appears to have a pin, but the outside appears to be connected to 2 pins. Do i just leave one of these pins floating, or connect both to a single gnd line. Thanks.

williB · 21st October 2004, 05:30 AM

did you use your ohmmeter to find where the pins connect..?

audioguru · 21st October 2004, 05:40 AM

The 3-pin jack switches off the battery when you plugin the adapter so the battery doesn't get overcharged and blows-up!
One of the two pins goes to the battery and the other pin goes to the circuit. If you get them backwards, the adapter gets connected to the battery instead of to the circuit.

williB · 21st October 2004, 05:45 AM

Quote:

Originally Posted by audioguru

The 3-pin jack switches off the battery when you plugin the adapter so the battery doesn't get overcharged and blows-up!
One of the two pins goes to the battery and the other pin goes to the circuit. If you get them backwards, the adapter gets connected to the battery instead of to the circuit.

that kind of jack..lol,,
i just couldent picture what he was talking about..

dak246 · 21st October 2004, 08:59 AM

Thanks, problem solved.

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21st October 2004, 03:27 AM	(permalink)
dak246	Pins on a DC power jack How do i connect the pins on a DC power jack? Im upgrading from using a battery, and the power jack i have has 3 pins on it. The power supply im plugging into it has a positive center and negative outside. On the jack, the inside appears to have a pin, but the outside appears to be connected to 2 pins. Do i just leave one of these pins floating, or connect both to a single gnd line. Thanks.

21st October 2004, 05:30 AM	(permalink)
williB	did you use your ohmmeter to find where the pins connect..?

21st October 2004, 05:40 AM	(permalink)
audioguru	The 3-pin jack switches off the battery when you plugin the adapter so the battery doesn't get overcharged and blows-up! One of the two pins goes to the battery and the other pin goes to the circuit. If you get them backwards, the adapter gets connected to the battery instead of to the circuit.

21st October 2004, 08:59 AM	(permalink)
dak246	Thanks, problem solved.