Polarity Does anyone know the polarity of the 12VDC 1A power adapter?
332882
The diagram on the Power Supply shows that the center is (+), outside is (-).
68276
Hello, As it shows on the side of the radio the power supply should be a 4.5volt DC 200ma wall wort power supply and the CENTER pin is -negative polarity. I would suggest that you take the radio to a local store to find the correct plug that goes into the radio. I am only using the radio with batteries with my unit. Good luck, Ed.
2158380
Most generator hubs are AC so there is no need to worry about the polarity of the wires as you attach them to the hub terminals using the connectors already present. Look for your hub user manual online for that info if desired.
569337
It's never a good idea to try to trust wire insulation color as a determination of polarity unless you have a datasheet that clearly states the color and polarity. I always test power supply outputs with a meter before connecting them.
1963345
The power supplied to the box is 12V/3A DC. My power adapter is "universal" (i.e., works with 110v or 220V 50/60HZ). The power plug is a common 5mm plug (the polarity is + at the inner ring and - at the outer ring of the plug) and you can get such an adapter from a myriad of vendors (try ebay :-)) or even Amazon.
688279
There is a full bridge rectifier on the input power pins that make the device able to accept DC power at either polarity. It will work with AC power (12 VAC please, NOT 120 VAC) as well, but you may observe 120 Hz flicker depending on how much capacitance is placed between the rectifier and the switching circuit.
1172575
The AC adaptor is rated at: *Input - 120 VAC, 60 Hz *Output - 6 VDC, 130 mA *Polarity - inside positive. That's all I can give you!
1510637
No it does not. Go back and check your wiring you might have reversed the polarity.
348592
Usually you use the two outside terminals or whichever ones are marked + and -.Polarity does not seem to matter to the charger.
1887433
The voltage is 9 v and the amperage is 80 mA. the polarity is Neg-outside and Pos in the inside.Neg---(0---Pos.
1550328
No, no polarity detector. You have to change the connection to measure charge or discharge currents.
1695626
I assume one of the prongs is a bit larger (more square)? That is the modern polarity plug and sometimes they will not fit into old outlets. A couple-dollar adapter bought at any hardware store will cure your problem (take fixture with you so hardware store people know what you are talking about) or, you can update the outlet in your home that you want to use, with a new design outlet (not easy for untrained person to do and could be dangerous to try by yourself).
1119020
Yes it does, Robert. They offer AC-polarity power connector cords as well as ones for DC-polarity. The ones saying that it doesn't don't seem to have done their due diligence in using this Joyo Power Supply, it states AC & DC support in the instruction book.
1333756
The polarity of the T connectors is standard -- the top bar of the T is positive and the post is negative. The labels on the diagram in the instructions are misleading since they are opposite to the orientation of the T sockets.
1379032
Amazon carries for under sdollars make sure that you get the correct polarity--- Positive center negative outside!!!!
511297
Mine works fine, but remember you have to separately plug it into the appropriate pins on your motherboard, if you did that and it still does not light, reverse the leads and try that. You would think that polarity does not matter but we've found out in this case it does. Also, don't pay the current price showing here of $84, I bought mine on sale from Amazon back in January for $49 including a $10 rebate, but for instance right now at New Egg this same case is on sale for $59 with rebate
1230346
I don't have any experience with your keyboard, but usually you'll find a sticker near the plug that tells you what voltage and amperage it needs from its adapter. Also, if there's a little diagram that looks kind of like a "C" wrapped around a dot, pay attention to which one is labelled positive and which is negative. If you can get that info, you can just buy an adapter that matches that description and you're in business. Good hunting!