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How to turn 5v into 12v?

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srxspec

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I am trying to activate a 12v relay (that is connected to the battery as well), but want to use a 5v source to do it. What will I need? Thanks in advance.
 

You need a step-up converter ..
Attached is an example based on the LM2577 ..

IanP
:D
 

Why cant you go for 5v relay that is redly available in the market, instead of boosting the 5v and making the circuit big and costlier.
 

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