Re: Increasing the DC 5V 250 mA adopter volt & amp.
have you even opened one of those mains DC adapters ? many parts are surrounded in glue. If you spend enough time
you might identify the feedback resistor divider network and alter the values for a different output voltage.
But there is no way you will at the same time increase the current rating.
5V @ 250ma is 1.25Watts, you can't magically make such a supply deliver 24V@2amps = 48Watts.
None of the components in it will be rated for that power capability.
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