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Dual Polarity Power Supply CIRCUIT (LM7824T)

2015-03-22 23:01  
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This article describes the Dual Polarity Power Supply CIRCUIT (LM7824T). The content is very simple, very helpful. Components in this article can help you understand better understanding of this article. For example, in this article, you can go to find and buy these components:LM7824T.

This supply gives both positive and negative outputs. Appropriate Fuses should be used to protect from fire hazard and overload of transformer.

Dual Polarity Power Supply

The Filter capacitor C1 4700uF has an impedance ofXc = 1 / (2 * 3.14 * f * C)which comes to 0.6 ohms at 50 Hz. The impedance of the load at 2A for 24V isR = V / Ithat is 12 Ohms which is more than 20 times the impedance of the capacitor at 50 Hz. That means less than 1 / 20 of ripple current will flow thru the load. The Regulator also reduces the ripple a little.



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