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regulator

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lee9587

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i have an lm741 in my project and i am wondering if i can use +9,-9 instead of the maximum rating???also i have an external -12v source and i am wondering is it as simple as using an lm7809 to bring this to -9v or would i have a problem with over heating??

thanks
 

ericgibbs

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i have an lm741 in my project and i am wondering if i can use +9,-9 instead of the maximum rating???also i have an external -12v source and i am wondering is it as simple as using an lm7809 to bring this to -9v or would i have a problem with over heating??

thanks
hi,:)
A 741 will work OK with +/-9V supplies.

The Vout will only swing to about +/-2.5V of the rail voltage, using +/-9V this will be approx +/-6.5V
 
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crutschow

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The supplies don't need to be equal, so you can also run it from +9V and -12V without problem, eliminating the need the the lm7809.
 
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