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I purchased a wall wart and even though it says 9 volts, when I measure it I get 14 or 16 volts. Whats going on?

going measure volts wall wart
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I purchased a wall wart and even though it says 9 volts, when I measure it I get 14 or 16 volts. Whats going on?

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You have an unregulated power supply. You can turn it into a regulated power supply by using a voltage regulator like the LM317. See this thread.

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