Hi, i have a 4 channel FM Transmitter which we got ages ago off of ebay and we have lost the power adapter (so everywhere we go we need a godd supply of AAA Batteries) recently or GPS Power cord frayed and shorted out (Luckily the car is fine) so anyway, we borght a Multi Voltage Power supply to get the GPS working and its working great for that however we were told that with the GPS you had to find out what 'something' it was this something was the -(o+ vs -o)+ (im not sure what this is called) anyway.... i was wondering if anyone could have evidence and be able to back up a claim of what an FM Transmitter could be that looks like this one
OEM Interface Forum » Wireless FM Transmitters & Bluetooth Transmitters
FM Transmitter Power supply?
(3 posts)-
Posted 1 year ago
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They are refering to the polarity of the power supply. Simply put, you need to know whether the center pin of the unit requires positive (+) voltage or negative(-). This symbol -(o+ simply means that the power supply runs the positive voltage on the center pin or tip. -o)+ Means the negative is on the center pin or tip. Typically, DC powered devices will have one of those two symbols on the data plate that describes the power requirements. A DC power supply will have the same thing on it. If it is a fixed connector (some are reversible, to change polarity withoput having to buy a new supply), get a power supply that matches the symbol on the transmitter. If the voltage also matches, you are good to go. If the power supply has interchangable tips, it should be marked to show which way to connect, to give the required polarity. Simply make the symbols match and you´re good.
Posted 1 year ago # -
They are refering to the polarity of the power supply. Simply put, you need to know whether the center pin of the unit requires positive (+) voltage or negative(-). This symbol -(o+ simply means that the power supply runs the positive voltage on the center pin or tip. -o)+ Means the negative is on the center pin or tip. Typically, DC powered devices will have one of those two symbols on the data plate that describes the power requirements. A DC power supply will have the same thing on it. If it is a fixed connector (some are reversible, to change polarity withoput having to buy a new supply), get a power supply that matches the symbol on the transmitter. If the voltage also matches, you are good to go. If the power supply has interchangable tips, it should be marked to show which way to connect, to give the required polarity. Simply make the symbols match and you´re good.
Posted 1 year ago #
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