will a crank break my harddrive? +HD power question
hi, the question is:
will a crank break my harddrive?
the details are, my system will be laptop powered so cranking not a problem! -but i will have an external harddrive for the MP3's that will require a seperate power supply (12V & 5V) im planning on using a low dropout reg for the 12V and a 7805 for the 5V (i know the nicer way would be to boost the 5V back up to 12V but i cant be bothered (but i might!)), if its running when i crank what will happen to th Hard drive will it just stutter or crash or die?
p.s. how much current does a harddrive (desktop) need, on both the 5V line and the 12V line?
how low can the voltage go on the 12V line before it complains?
i might build a tank circuit -small lead acid batteries are on sale at maplin at the mo! depends on your answears i guess!