Hi, i am after a circuit that will light an LED if a fuse is blown, it needs to run at mains ( so +------|==3amp==|----[LOAD]------GND) with + and - being mains. the circuit here looked ideal: HERE except i cant help feeling it is not going to work.... if leds could be run of mains so easily, using one 100k resistor, it would be comon as hell. turbokeu has a circuit on his site here: http://www.turbokeu.com/myprojects/acled.htm for funning LEDs of mains and it is a lot more complex than the above! but not one for if a fuse was blown. Also the first site, on the second circuit for "Warning buzzer" the buzzer is shown connected directly over the 12v, so it would allways be on wouldent it? any ideas?