DIY bench power supply

[rdl]

Sorry, I didn't notice this post until today. I guess you already found the file, but just in case - I got it from a link in this review:

http://www.wisewarthog.com/electronics/horowitz-hill-the-art-of-electronics-3rd-edition.html

I personally wouldn't waste any time on that circuit from electronics-lab.com, it's been debated and modified for years. The last time I looked there were two threads about it with thousands of posts where people have been trying to fix it. It would take days to sort through it all. I would at least start from a circuit that's known to work well.

For anyone thinking about building their own supply I'd highly recommend getting a copy of the free preview pdf of the Art of Electronics third edition. It includes chapter 9 on power supplies, which is over a hundred pages - almost a book on its own. I'm sure there are other places to get it, where you don't need to request a password, but here's the official link:

http://www.cambridge.org/us/academic/textbooks/art-electronics

I have made several attempts to download this free file, but so far I have not not received a password.  Is this something you can post here or alternately suggest another link. So far my searches on Google have drawn a blank or pointed at the link you provided.

Thanks

[Cliff Matthews]

Sorry, I didn't notice this post until today. I guess you already found the file, but just in case - I got it from a link in this review:

http://www.wisewarthog.com/electronics/horowitz-hill-the-art-of-electronics-3rd-edition.html

That's the site! (I cleared my cache and forgot where I got it....) Thanks 

Note: To avoid any legal problems, I will remove the file. (already 20 people have downloaded it)

[mstck]

Some progress: I just got my password for the free TAoE sample chapter 9 (on power supplies).
I replied, asking Fran Robinson (frobinson@cambridge.org) for permission to post it in the books section.

If we get permission, I will post a 6-part zip file for everyone there. MSTCK: did Cambridge.org give your password yet?

Cliff, I just checked and realized that the password finally arrived.  The subsequent post by RDL and the link provided appears to answer the question surrounding the right to share the file.

[rdl]

I can't imagine why they would care if someone made the file available elsewhere since they're providing it for free. Maybe requiring a password was just to avoid excess traffic on their server or something like that.

[Zero999]

1 - U2 and U3 must draw very little current - How do C2 C3 and D5 D6 magically invent that negative rail?

They form a voltage doubler to make the negative rail.

[ivan747]

The whole project around that schematic seems to be at http://electronics-lab.com/projects/power/001/

There's a update on this project here.

Also read the electronics-lab forum, there's a lot of comments on this design there.

AWESOME
Great find!