[sdiy] P-p-power!!!

Tim Ressel timr at circuitabbey.com
Tue Apr 16 03:18:50 CEST 2019

That is a pretty groovy cube!  I am trying to keep this one linear 
though. Should have mentioned. My bad.


On 4/15/2019 6:16 PM, ulfur hansson wrote:
> I've been using this CUI DC-DC converter for recent projects. no 
> additional caps or circuitry needed, plus it has overcurrent/reverse 
> polarity protection.
> https://eu.mouser.com/ProductDetail/CUI/PDQ30-Q24-D15-D?qs=ZGJ6LVh7YLAL%2FeHNTwkTGg%3D%3D
> it is super sleek!
> -ulfur
> mán., 15. apr. 2019 kl. 21:09 skrifaði Tim Ressel 
> <timr at circuitabbey.com <mailto:timr at circuitabbey.com>>:
>     Yo,
>     I am putting together a power supply for my new 5U case. At first
>     I just
>     have 7815 and 7915 regulators. But then it occurred to me: would
>     it not
>     be indeed nice to have both rails fold back if one over currents? to
>     answer my own question, why yes, yes it would.
>     So now to make it work. I thought of using LM317 and LM337s and do a
>     cross-over thing. Use an op-amp to servo off of a virtual ground
>     set up
>     with a voltage divider. I am not sure if that will do what I want. I
>     guess I can try it with the 'L' versions; easier to put into foldback.
>     I also thought of using LM723s but that gets complicated in a hurry.
>     More than I want.
>     Thoughts?
>     --Tim (musing aloud) Ressel
>     -- 
>     --Tim Ressel
>     Circuit Abbey
>     timr at circuitabbey.com <mailto:timr at circuitabbey.com>
>     _______________________________________________
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--Tim Ressel
Circuit Abbey
timr at circuitabbey.com

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