Why do wall wart type power supplies often output voltage well above the rated output voltage, the spec on the side will say 9v dc and checking the actual output it will read 13.5v?
Does that mean it's toast?
I have a box of various power supplies, it's often its handy to have spare power supplies but I come across the issue outlined above quite often and I'm not sure whether to chance it or not.
I'm sure I've read somewhere that switch mode power supplies, which I'm assuming most of these are, adjust to the load once a device is connected and will stabilize to the rated voltage a split second after the device being powered up?
Does that mean it's toast?
I have a box of various power supplies, it's often its handy to have spare power supplies but I come across the issue outlined above quite often and I'm not sure whether to chance it or not.
I'm sure I've read somewhere that switch mode power supplies, which I'm assuming most of these are, adjust to the load once a device is connected and will stabilize to the rated voltage a split second after the device being powered up?
