Dual Polarity Regulated Power Supply circuit with IC 78xx/79xx

Dual Polarity Regulated Power Supply circuit diagram

This is a regulated power supply circuit with dual polarity output. There are 3 output that are (+) voltage, (0) Grounding, and (-) voltage. The current output max about 0.3-0.5 A. IC 78xx is used as positive voltage regulator while IC 79xx is used as negative voltage regulator.

You need center tapped (CT) transformer 0.5-1A for this circuit. Use transformer voltage output refer to your need. For example, if you need 12v output, you should connect J1 to 15v transformer output, J2 connected to 0v and J3 connected to another 15V.

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Power Supply Adapter

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