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Fuse monitor circuit

2015-01-22 12:20  
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fuseThis circuit monitors a DC fuse. Its LED lights continously when the fuse is intact but blinks is the fuse is broken. The fuse monitor circuit is designed for 12 volts but can be modified for other voltages. To use this circuit for 6 volts, divide all resistance values by two, for 24 volts, double the values.
The circuit consumes around 25 mA and most of the current is consumed by the LED. If you decide to use the circuit in battery operated modules, it is highly recommended to use a high efficiency LED and increase the value of R7 accordingly.

Circuit diagram of the fuse monitor

fuse monitor circuit diagram


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