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how to generate negative 9v

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Dhaval Shah

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hi all

i am trying to generate negative 9v from positive 12v using lm358 op amp..but its not working..

any help..please give me suggestion if any one knows how to get it..its urgent



thanks :)
 

keith1200rs

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Dhaval Shah

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thanks for the reply..

i am using single supply of +12v and want to generate +15v and -9v using lm358...in this case i got +15v and its work but i didnt get -9v...any suggestion:)
 

keith1200rs

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What circuit have you used to generate 15V from 12V with the LM358? How much current do you need from the 15V & -9V?

Keith
 

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