Help with EAGLE CMoy design, please =)

[Joshatdot]

I got a crude CMoy Schematic with TLE2426CLP, Alps RK097, etc...

I think it's designed fine in the schematic, but I am not sure, plus its all wacky looking. All you need to check it out is the CMOY.SCH right?

http://www.cnw.com/~josh/Head-Fi/CMoy.sch

 

[Joshatdot]

Is there a library with most common Head-Fi DIY components? Like various 3.5mm jacks, op-amps, resistors, caps (power & input).

 

[colonelkernel8]

I know there is a link to a page on Tangents website that has several libraries of such components. Try searching.

 

[firefox360]

Here's the link to all the EAGLE components avaliable at Tangent's site:

http://tangentsoft.net/elec/parts/eagle/

 

[AndrewFischer]

Just the .SCH file if you aren't using any custom libraries.

If you modified any libraries, we'd need those too.

I loaded the schematic and ran the Electrical Rule Check. ERC turned up 4 warnings and 2 errors. Looks like it is all about the power for the IC -- possibly not a problem. Double check though.


If you split the power supply and amp sections the schematic may be easier to read.


Why are C1 and C2 in series? Shouldn't that just be a single cap?

Minor -- The TLE2426 doesn't need a 1/2 on it. You should be using a package that contains a single rail splitter.

Tangent has a few libraries that are worth a look at. Other than that, I'm not aware of any for head-fi. There are some out on the net for free download. Google will find them.

Edit: Looks like you found Tangent's libraries. I recognize the TLE.

 

[Pars]

Also, I would renumber the resistors the same between channels (R1L, R1R etc.) instead of having them individually numbered. Its less confusing that way.

 

[Joshatdot]

Quote:

Originally Posted by colonelkernel8 /img/forum/go_quote.gif I know there is a link to a page on Tangents website that has several libraries of such components. Try searching.

Quote:

Originally Posted by firefox360 /img/forum/go_quote.gif Here's the link to all the EAGLE components avaliable at Tangent's site: http://tangentsoft.net/elec/parts/eagle/

I got all the Libraries from Tangent before I started this CMoy.

Quote:

Originally Posted by AndrewFischer /img/forum/go_quote.gif Just the .SCH file if you aren't using any custom libraries. If you modified any libraries, we'd need those too.

I grabbed all the Libraries from Tangent.

Quote:

Originally Posted by AndrewFischer /img/forum/go_quote.gif I loaded the schematic and ran the Electrical Rule Check. ERC turned up 4 warnings and 2 errors. Looks like it is all about the power for the IC -- possibly not a problem. Double check though.

I am a total noob, I dont know what that really means, or how to fix it.

Quote:

Originally Posted by AndrewFischer /img/forum/go_quote.gif If you split the power supply and amp sections the schematic may be easier to read.

I'll try, again I am a total noob to this program.

Quote:

Originally Posted by AndrewFischer /img/forum/go_quote.gif Why are C1 and C2 in series? Shouldn't that just be a single cap?

I think I forgot the ground links

Quote:

Originally Posted by AndrewFischer /img/forum/go_quote.gif Minor -- The TLE2426 doesn't need a 1/2 on it. You should be using a package that contains a single rail splitter.

the 1/2 is from Tangent's TLE library

 

[AndrewFischer]

Quote:

Originally Posted by Joshatdot /img/forum/go_quote.gif I am a total noob, I dont know what that really means, or how to fix it.

It is the names of the nets. Eagle wants them to be V+ and V-. I don't think it much matters. I changed your + and - 9V supply pins to wirepads, renamed the nets and half the errors went away.






Quote:

the 1/2 is from Tangent's TLE library

Yeah. The layout will still be correct. The schematic will be slightly wrong, but that doesn't really matter. You could go and fix the library.

 

[Joshatdot]

GRAG!!! I am trying to clean it up & fix it, but I can't

I need to take a class in this program

I tried to design the board part with my crude schematic, but that didn't turn out well, heh heh.

 

[AndrewFischer]

Quote:

Originally Posted by Joshatdot /img/forum/go_quote.gif GRAG!!! I am trying to clean it up & fix it, but I can't I need to take a class in this program I tried to design the board part with my crude schematic, but that didn't turn out well, heh heh.

Keep at it. You will get better. Any specific problems or questions? (There is that Eagle thread here too)

 

[AndrewFischer]

I moved the power supply away from the amplifier. I also fixed the capacitor error. See if you can duplicate this:

Edit: The power switch is missing and needs to go back in. I did this quickly just to show the overall idea.

 

[tangent]

Quote:

Originally Posted by AndrewFischer /img/forum/go_quote.gif The TLE2426 doesn't need a 1/2 on it.

It's a style issue. You will sometimes see a buffer as a right-pointing triangle with a '1' in it, meaning a gain of 1. If you buy into that being useful, then it makes sense that a TLE2426 be "1/2".

 

[Joshatdot]

What is a standard PAD for 9v battery straps? I chose 2.54/1.1

are you sure the pin out/schematic of your TLE is correct?

Datasheet: Pin 1 = IN (V+?), Pin 2 = COM(GND?), Pin 3 = OUT(V-?)

 

[AndrewFischer]

Quote:

Originally Posted by tangent /img/forum/go_quote.gif It's a style issue. You will sometimes see a buffer as a right-pointing triangle with a '1' in it, meaning a gain of 1. If you buy into that being useful, then it makes sense that a TLE2426 be "1/2".

I didn't know that. Makes sense. I couldn't get past 1/2 meaning half of a dual device and didn't think of the gain being 1/2.

 

[AndrewFischer]

Quote:

Originally Posted by Joshatdot /img/forum/go_quote.gif What is a standard PAD for 9v battery straps? I chose 2.54/1.1

Typical 9V battery straps are 22 to 26ga wire. 22ga is about .64mm I think. 2.54/1.1 is fine. Olimex specifies hole sizes before plating. Finished holes are about .1mm smaller. Every other fab I've ever used specifies hole sizes after plating. With a fab other than Olimex you could use 1.0mm holes. Holes bigger than 1.3 mm are getting a little large for 26ga wire.

Quote:

are you sure the pin out/schematic of your TLE is correct?

I just checked Tangent's library and it looks ok to me.

Vin should connect to the Battery +
Common should connect to the Battery -
Out is Vin/2 and connects to the virtual ground.


Tanget has a good explanation of virtual grounds here: http://tangentsoft.net/elec/vgrounds.html