Flashing led when connected

[countryboyy04]

Hey everybody im trying to build a charger for my phone and ipod , I know how to build the charger but what i want is to have my charging led blink on and off only when i connect my phone to the charger how would i do that

 

[Sceadwian]

This is a repeat thread, your question has already been answered in another thread. Please don't cross post.