The Shop > Electronics & IC Programing

Advice on which linear regulator to get

(1/3) > >>

nrml:
Santa is bringing me a raspberry pi 2 and a GPIO to SPDIF adapter for christmas :ddb:. I am planning to use this along with a USB SSD hard disk as a digital music player / storage solution to replace my CD player and CDs. My research leads me to believe that to be on the safe side, I need a clean 5V 2A power source for the Pi and I need to power the hard drive separately.

I am a bit confused as to which linear regulator would suit my needs best. I see two commonly sold versions on ebay; one with LM317 and LM337 regulators and the other with LT 1083.
http://www.ebay.co.uk/itm/271923226377?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT
http://www.ebay.co.uk/itm/271891627271?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT
There seem to be smaller versions of these around too.

I already have a 9V output transformer that I am going to feed the regulator with.
https://uk.rs-online.com/web/p/chassis-mounting-transformers/0504690/?searchTerm=10-5843&relevancy-data=636F3D3126696E3D4931384E4B6E6F776E41734D504E266C753D656E266D6D3D6D61746368616C6C7061727469616C26706D3D5E285C642B5B2D5C2E5C732F5D292B285C642B293F247C5E5C642B2426706F3D313326736E3D592673743D4B4559574F52445F53494E474C455F4F525F4D554C54495F4E554D455249432677633D424F5448267573743D31302D3538343326

Which regulator would be best for my little project?
Thank you for all constructive advice.

Nirmal

Bluechip:
The LM337 is a negative adjustable regulator.  :thumbup:

Look at the schematic, it shows you there.

Do you want a negative supply as well as the positive.

The LT1083 appears to have 2 separate outputs, not sure I really believe the 10A bit though ..

However, if you're only pulling a max. of 2A you should be OK.

http://cds.linear.com/docs/en/datasheet/108345fh.pdf

Dave

nrml:
I don't think I need a negative voltage. Just a reasonably cheap clean power supply to keep jitter in the digital audio output as low as the pi will permit. Having very little knowledge of electronics, I was unsure if one was vastly superior to the other in performance as a 'clean' power source.

shipto:
personally I use lm317 for most regulator needs but thats only good for 1.5 amp but the lm338 is wired exactly the same and can handle 5 amps.

John Rudd:
Think personally I'd be using switching regulators....more efficient..less heat.

But, your choice :scratch:

Navigation

[0] Message Index

[#] Next page