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Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
Your question is far too vague!, please be more explicit, and give details of the current required, what the supplied devices are, how long they need power for.
The voltages you mention look to be just a simple 'wall wart' type power supply, which only outputs one of those voltages, depending how it's set.
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