I have an external hard drive enclosure that requires 12V @ 4.2A, mostly due to it holding 2 drives, and startup current is high, so running current should be substantially lower. The enclosure is: HERE
What I would like to do is construct a plug that my laptop power cable will plug into and split it's power between the laptop and the hard drive enclosure. Basically piggybacking the laptop supply.
my Laptop power supply is 19V @ 3.42A
If I've figured this out correctly:
19V*3.42 = 64.98W
Using that information I then calculated:
64.98W/12V = 5.42A
That is plenty of current needed to start the hard drives, after which should settle down to something more reasonable.
What would be the simplest and/or cheapest way to step down my laptops power supply to 12V so that I can use just one plug to run my laptop and external drives?
What I would like to do is construct a plug that my laptop power cable will plug into and split it's power between the laptop and the hard drive enclosure. Basically piggybacking the laptop supply.
my Laptop power supply is 19V @ 3.42A
If I've figured this out correctly:
19V*3.42 = 64.98W
Using that information I then calculated:
64.98W/12V = 5.42A
That is plenty of current needed to start the hard drives, after which should settle down to something more reasonable.
What would be the simplest and/or cheapest way to step down my laptops power supply to 12V so that I can use just one plug to run my laptop and external drives?