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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: Re: Help with LM317 posted by SPARKS 1st on February 28, 2005 at 01:32:03:
Thanks.I tried some higher value resistors - 1k for R1 & 10K for R2 (I didn't have a 1K1 on hand for R1). Nothing burned up this time, but there seems to be no regulation. Maybe the LM317 died quietly with no smoke or light show. I did have a diode across pins 2 & 3. Is there a way to test if it is still working with a DVM?
I wanted the 30000uF for the ripple filtration rather than because I need massive reserves. Would 10000uF be more reasonable for the LM317? Is there a formula to figure out how much current a capacitor can deliver? I presume it's the current from 30000uF that is the problem for the LM317.
Obviously this is my first attempt at designing a power supply. :) I am getting a nice steady 22.3V without regulation... But I really wanted a regulated supply.
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Follow Ups
- Re: Help with LM317 - Crispin Steele 11:44:48 02/28/05 (7)
- Re: Help with LM317 - frum4 15:41:47 03/21/05 (0)
- Re: Help with LM317 - DIAR 05:05:41 03/01/05 (0)
- Re: Help with LM317 - SPARKS 1st 13:42:26 02/28/05 (3)
- Re: Help with LM317 - Crispin Steele 15:24:36 02/28/05 (2)
- Re: Help with LM317 - SPARKS 1st 15:33:21 02/28/05 (1)
- Re: Help with LM317 - Crispin Steele 16:05:30 02/28/05 (0)
- Most likley scenario .. - clifff 12:46:52 02/28/05 (0)
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