AC to DC Converter... aka Wall Wart

[KB]

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I need an ac to dc converter for another project. Probably, similar to most, I have a box of them as collected over the years.

I need 12 VDC output. Checking the wall warts marked as 12 VDC output I find everyone, so far, is > 12 VDC. I checked with a digital VOM and an analog VOM and get the same results.

Is this common? Do voltages normally exceed the printed value on the converter? If so, how high is acceptable when something wants/expected 12 VDC input?

Kal, if I have posted this query in the wrong forum, please move to the correct forum.

Thanks.

[kal]

It's very common for the output on cheap wall-warts to be off.

I have a box of them as well and the measured DC voltage is often way off from what's written on it as many will just use very cheap circuitry without any actual voltage regulator, but simply a 4x diode bridge with a cap after to reduce valleys.

Kal

[kal]

It's very common for the output on cheap wall-warts to be off.

I have a box of them as well and the measured DC voltage is often way off from what's written on it as many will just use very cheap circuitry without any actual voltage regulator, but simply a 4x diode bridge with a cap after to reduce valleys.

Kal