The homemade simple emergency light circuit diagram

Published:2012/12/17 3:34:00 Author:Ecco | Keyword: homemade, simple, emergency light | From:SeekIC

The circuit is shown as the figure, the 220V mains is rectified through transformer T, Buck by VD1 to obtain approximately 9V DC voltage on the capacitor C1. This voltage charges for battery all the way through VD2, and resistor R2 provides the base bias for V1 until saturated conduction, then V2 is turned off, bulb H does not shine.



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