Is the center of the power plug that goes to a device to be powered positive or negative?
2082766
I assume you're talking about the barrel connector on the plug and its mate in the battery? The outside is return (negative) and the inside/recessed pin is power (positive). That is for safety reasons, so that if the barrel connector touches something grounded it doesn't short.
943550
I need to return this item-the plug at the end is slightly different than what we need.
1037573
I agree with T. Thomas, sounds like reversed polarity - it's easy to do as the documentation is not very clear on the wiring.
1567056
negative or positive voltage is simply a reference to ground. reverse your power connections (leads) and you now have negative voltage. it does not have a dual output for both positive and negative voltagesgood luck
1474103
cord is on the left . it is a long cord so shouldn't be an issue for you if your plug is on the right.
1832392
The voltage and current rating look right (9volts at 200milliamps), but O can't tell you if the polarity of the plug is correct for that device. There should be a little symbol near the socket that looks like a dot with a semicircle surrounding it and with a "+" connected to the dot in the middle (center positive). If that matches, then you're golden. If not, then you need to keep looking. Please note, the part of this adapter with the two spade-pins that plugs into the wall socket can separate from the body of the adapter and is notorious for breaking away from it. The only fix I've found for that is to glue it in place with super glue or model glue. The voltage and current rating look right (9volts at 200milliamps), but O can't tell you if the polarity of the plug is correct for that device. There should be a little symbol near the socket that looks like a dot with a semicircle surrounding it and with a "+" connected to the dot in the middle (center positive). If that matches, then you're golden. If not, then you need to keep looking. Please note, the part of this adapter with the two spade-pins that plugs into the wall socket can separate from the body of the adapter and is notorious for breaking away from it. The only fix... » Read More The voltage and current rating look right (9volts at 200milliamps), but O can't tell you if the polarity of the plug is correct for that device. There should be a little symbol near the socket that looks like a dot with a semicircle surrounding it and with a "+" connected to the dot in the middle (center positive). If that matches, then you're golden. If not, then you need to keep looking. Please note, the part of this adapter with the two spade-pins that plugs into the wall socket can separate from the body of the adapter and is notorious for breaking away from it. The only fix I've found for that is to glue it in place with super glue or model glue. « Show Less
991913
Wires hook to the posts on coil , one side is negative and other side is positive
794856
The plug is 2 prongs, and the one on the left is the larger one. So if your socket goes that way (our does) it'll be right side up.
764382
Hi Mike,my power supply adaptor is 12 volt,2.5 Amp.part # 18778.the +pos is on the inside of the post plug & the - negative ground is on the outside of the post plug plug that plugs into your 12 volt port.
1333755
the wire with the dean connector that is included is color coded red/black for the polarity. output is the load dean socket. source is the input dean socket. it's clearly labeled in the watt meter case where you plug in the dean connector.
1953353
Sorry, Allthumbs16; I gave this as a gift and didn't try it out. However, I was told by the person I gave it to that you hook it up between positive and negative.
700448
I use a 1 spot power supply, negative is the center, positive on the outside.
714824
Center-tip-negative polarity is not the norm, easier to buy one here. You'll see one in the "customers...also bought" links--e.g. Planet Waves 9V Power Adapter, which has the polarity you need. Just make sure any adapter you use is "center tip negative".
940857
2 posts in middle are for positive/negative DC Input. The two outside posts are for positive/negative DC output to motor. Switch just reverses polarity on those 2 posts.
438588
Look on the heel. There is a symbol for polarity and input voltage, ac or dc. Take the unit to a store like radio shack and have the clerk match you up. It is NOT proprietary. Test your charger with a little meter. Buy one when you are at RS.
1830855
The positive terminal is always red and in lighter type socklets the middle terminal is always positive. The ground (or black) is usually like a surround as the lighter or the power supply plug is inserted into the socket the heating element or "button" is pressed against the middle, power is supplied and the ground circuit is completed through the outside of the plug.
1479499
With a standard 12v DC adapter. Look on the PCB and you will see a + and - sign indicating the polarity.