DC low-voltage blown fuse indicator circuit diagram

Published:2012/7/11 1:54:00 Author:Ecco | Keyword: DC low-voltage , blown fuse indicator | From:SeekIC

DC low-voltage blown fuse indicator circuit is shown as Figure 1, which consists of two light-emitting diodes VD2 , VD3 , a silicon rectifier diode VD1 and resistor R. When the fuse is good, the green light-emitting diode VD3 is bright. As the function of VD1 and VD3, the two ends' level of VD2 is equipotential, the red light-emitting diode VD2 is turned off. When the fuse is blown, VD3 it turned off as the cathode has no voltage, then the red light-emitting diode VD2 emits light as the influence of VD1 and R. According to the switching of VD2 and VD3, people can easily judge on-off status.



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