Power supply question

I'm working on making an external hard drive enclosure. It will require 12v and 5v connections. I am thinking about using a 12v power supply along with a 5v step down.

the parts I'm wanting to use are. https://www.amazon.com/dp/B08MCCSP38/?coliid=IGTEQDJ1Z8UYG&colid=2Y2WLETYUI3XK&psc=1&ref_=lv_ov_lig_dp_it

https://www.amazon.com/dp/B07GFJVHRH/?coliid=I3BMX6OLHIF7KL&colid=2Y2WLETYUI3XK&psc=1&ref_=lv_ov_lig_dp_it

Does this seem to be a reasonable plan and are these the right parts?

by johnnymac
March 23, 2021

That seems like it will work. there are also power supply's with both 12 and 5V outputs

by Garrett
March 23, 2021

Garrett,

Thank you for the response. I'll look around and see if i can find one with both, but if this will work I am happy.

by johnnymac
March 23, 2021

That looks like a switching power supply, which produces high frequency interference which CAN disturb your electronic.

by vanderghast
March 24, 2021

The working voltage of the hard disk is +12V and +5V, and the working current is 0.50A-0.80A, about 0.65A. +12V provides power to the spindle motor and seek motor of the hard disk. +5V provides power to the hard disk's circuit board. Power supplies with 12V and 5V output are no problem. You can also find more on https://www.newomi.com/search?keywords=Power%20Accessories Power Accessories

by chinchuan
April 26, 2021
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1 Answer

Answer by febb

You need step down DC-DC back converter, like car cigarette power converter to USB 5V. There are millions chips and solutions. On Aliexpress you can find a lot for less then 1$: MINI DC-DC STEP DOWN CONVERTER. Check what power HDD required on 5V rail. Usually it is less then 1A.

+1 vote
by febb
April 10, 2021
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