Reducing 12 VDC to 9 VDC
Hello all, I bought this neat bath vanity mirror that has LED lights. It is made for residential homes and uses 110V with a transformer plug, of course. The transformer says the output is 9 volts ...
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I have two of these voltage regulators as speed controllers for powerful 92 and 80mm muffin fans. They do not fit tightly in a 12v power port and can be tweaked to the side where the Nipple(+) metal retainer comes in contact with the grounded exterior and blows the fuse feeding the 12v power port.
Some adhesive lined heat shrink over most of the tip but for the spring loaded nipple contact makes them usable.
It is also far too easy to reverse polarity when moving the voltage selector switch, which is also too easy to change to a different voltage.
Having lots of experience with this product, I'd not recommend such a device in this application, though it certainly could actually provide 9 volts at upto 2 amps.
The USB output is 500Ma only however.
