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Regulated 15 -15 Volts Symmetric Power Supply From 12 Volt

2015-03-24 13:41  
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If you need -15 Volts supply and you have only a standard 12V AC transformer, don’t be hurry to buy a new one with center tap, you can use your old transformer! The schematic diagram of this circuit is shown in the figure below.

 

 

simmetric double voltage circuit schematic

 

The voltage before entering the regulator IC  7815  and  7915  might reach 24 volts, if there is no current drawn by load.? The recommended 7815 and 7915 is the IC from Motorola, since they designed for up to 30 Volts input voltage.


 

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