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LM338 power supply PCB. I want to design one for personal use. - Page 2

post #16 of 20

Creating and editing components is a skill an EAGLE user should learn early on.

Refer to your owners manual for detailed information.

 

Here is the Readers Digest condensed version.

 

Open EAGLE.

Make sure no schematic or board files are open.

 

Expand Libraries.

Find Heatsink.lbr.

Open Heatsink.lbr for editing by right click > open.

In the Package tab (looks like an IC) open SK129PAD for editing.

Remove the polygon in layer tRestrict.

 

Save

 

Open your board file and and do Library > update all.

 

Your heat sink should no longer restrict your ground plane.

 

Good luck!

post #17 of 20
Thread Starter 

Hey, this is great! Thank you very much!

I tried before to edit this but had no idea how. I managed to get into the editor but never did go further than that and I admit I didn't think of reading the manual :rolleyes:

Now that I've adjusted it I could extend the ground plane and it looks better.

 

I'm also working on a single sided version for home etching :smile:

 

I tried again to add the project files but it seems that I don't have the permission. Is there a ritual to be performed or?

post #18 of 20
Thread Starter 

I also made a 3D rendering of the populated board :D

My first board looks nice!

post #19 of 20

Hi Bob:

 

I posted on the pinkfishmedia thread too but I'm not sure if you check that very often. Did you get this regulator built? If yes, impressions?

post #20 of 20

bob, it’s always a useful trick in the track lines because you can always put a 0R resistor in places that you don’t want a resistive value in. However, when you get your board and find out that you might’ve needed a bit of resistance somewhere, that’s something which you can’t fix after have designed a board and gotten it manufactures. Also, in case of a power supply, always make sure that the power supply exceeds your required specifications by at least 50 percent. Since sometimes circuits take a current surge when they are powered on, this might cause some problems if the maximum power output of power supply is less at that particular instant. 

 

circuit assembly


Edited by fakir - 10/1/14 at 10:45am
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