help on school project diode and lamp

jfj said:

hi, my teacher has set me this project which seems really simple but I'm not sure there isnt a trap.
He wants me to makea circuit which lights a diode when its working. so for example when you turn your car headlights on, this diode should come on,but if the bulb is blown, then the diode doesnt come on.
i had thought of putting the diode and bulb in series but there's not enough current and now i'm thinking of using a relay to light the led circuit but im worried that current going through the control circuit will be too much.
Does anyone have a simple solution to this
help

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jfj said:

thanks eric,
to be honest its for my son school project here in france.........and my electronic knowledge is kinda basic so i cant help him as i would like to.
the example of the car headlights is what his teacher gave him, so i think that must be what he's looking for.
but i have no idea of how to go about this so any help would be greatly appreciated

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