substituting wall wort for 2 batteries

Thread Starter

lokeycmos

Joined Apr 3, 2009
431
so im building an audio project that runs off of 2 9 volt batteries. i would like to substitute a wall wort. the problem is that the schematic has the two batteries in series with a ground inbetween. i attached a schematic. is this possible with a wall wort, weather it is 9v or 18volt? cause i have both. if this is not possible, could you please explain how this can be done as simple as possible with the least amount or parts?
 

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Thread Starter

lokeycmos

Joined Apr 3, 2009
431
thanks for the input. it gave me ideas. i ended up using this voltage divider. i was able the solder it together inside the walwart and add an extra wire.
 

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Wendy

Joined Mar 24, 2008
23,415


Those resistors are bit high, since you are using a 50KΩ pot connected to ground. Think about dropping them about 1/10 the value, or using the 3rd op amp I suggested.

On the other hand, if it works, never mind.
 
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