How do I increase the unregulated voltage from a 9v wall wart?


("how increase unregulated voltage 9v wall wart?")
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question sounds homework test problem. if so, encourage sure understand "theory" behind voltage doubler circuits, , can explain classmates and/or instructor.

unregulated, assuming mean unregulated dc voltage. might consider using voltage doubler circuit increase 9v around 15v or so.

see: dc voltage multiplier circuit plans ...
http://www.reuk.co.uk/dc-voltage-multipl...

see: voltage doubler, voltage tripler, voltage quadrupler circuit...
http://www.coolcircuit.com/circuit/volta...
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keep in mind however, when voltage increased doubler circuit, available current decrease in proportion.


best regards

i can use transistors, diodes, resistors, , capacitors. unregulated voltage needs 10 15 v. help


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