Fuse indicator circuit with light-emitting diode

Published:2012/10/9 21:15:00 Author:Ecco | Keyword: Fuse indicator , light-emitting diode | From:SeekIC

Motors and other electrical equipment commonly use fuse for over current and short circuit protection. But when the fuse blows, and it is not easy to detect. The circuit shown in Figure can timely inform the fuse blown. This is used for DC power fuse indicator. When the power output is normal, the current flows through R1, then LED1 is lit, it only shows that load work normally and supply polarity is normally. At this point, LED2 is fused and in short circuit without emitting light. When the fuse is blown, the current flowing through R2 makes LED2 light to indicate fuse failure.



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