Comments on my Aleph-X layout?

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Kari

Kari

Member
Joined 2004
ruffneck.net
I have actually done that already. That's why i had to order D,Se,G and S the way they are on the AX board. My inital plan was to make a A3 with these boards but they should do nice on a AX too.

I should receive my first batch of 30 driverboards on Monday or Tuesday. :)

Here's a pic of the layout:


An externally hosted image should be here but it was not working when we last tested it.
 
J

joho

Member
Joined 2003
Thermals

Hi Aurora,

My thermal problem is not a visual on sceen effect, i know what you mean. I studied the help files but i couldn't find the solution.
When i look at the last .png of Kari's design you see the cross connection from a path to the polygoon.So it's possible with Eagle.

Hi Kari,

How did you do that ?
B.t.w. that 3d picture is great !!!
Is that special 3d software ?

Best regards,
Johan.
 
Kari

Kari

Member
Joined 2004
ruffneck.net
Joho:

I have actually done nothing settingwise to Eagle to get those thermals. I do run version 4.13 if that has anything to do with it.

You can find the 3D software for Eagle here http://web2.callisto.twam.info/eng/index.php?page1=eagle3d

I'll check on howto setup a Wiki page for the groupbuy tomorrow (Sunday).

I'll also post scans of the driver pcbs as soon as i get them.

Thx to everyone for their input :cool:

/Kari
 
H

Howie777

Member
Joined 2004
geocities.com/hpt300
OK, I'm tempted to jump in on this as well but I have a really easy question.

How many Driver PCBs do I need for 2 channels? I see a lot of 2 main, and 4 driver orders but 4 driver orders is only 12 fets but the schematic calls out 8 fets per channel or 16 fets. So I would think you need 6 driver PCBs (3 fets each) and 2 main boards.

Or is the picture wrong and the Drivers PCBs have the 4 fets not 3?

Thanks,

Howie
 
L

lpm76

Member
Joined 2004
Hi Kari

I have been comparing KK's schematic with Greys original schematic. Mostly just to see where they defer from each other, but also to get a better understanding of the circuit. I have noticed that Kristian have omitted the zeners from the input. Do you know of any pro's and con's by doing that?

Also I have noticed that both Out- and Out+ is coupled to ground by either a 33ohm 3W resistor in KK's schematic or 2 parallel 62ohm resistors in Greys Schematic, but I can't find them on your board. Have I gone blind (wouldn't be the first time) or have you omitted them, and if yes then why?

Regards
Lars
 
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