Layout tips please...

[Ptownkid]

ahh, it does not recognize in because it's not in the schem, you have to add the part call wire pads in the schematic.

 

[3nity]

yeah at first i tought i would be able to do it all on a single layer. but then i found i couldn't , next time around i'll do that i'm still working on the schematic and of course on the layout.

 

[Samuel Groner]

Now we're getting somewhere! :thumb:

There are still some serious issues though:
* D101-D104 are floating instead of connected to the rails and have no part type.
* R1 got a wrong value.
* The output isolation resistor is now missing.
* You may want to mount the gain limiting resistor (R6 in the datasheet schematic) on-board as well.
* I'm not familiar with the software you use but I suspect that the net labeling for audio ground and supply rails won't work as shown.
* Just a cosmetic thing but I'd label the components with increasing numbers from left to right and with consistent digit count (i.e. no leading one-hundred digit for such a small schematic).

Samuel

 

[3nity]

Sorry for the delay...been working on some other projects..
here's my latest schem....

I'm not familiar with the software you use but I suspect that the net labeling for audio ground and supply rails won't work as shown

You're right it won't work but i made it so we can understand each other!!!

Everything seems on the schem now???

 

[keefaz]

I think you need to connect +24V, -24V and GND items available with add part from supply2 library in eagle.
You connect them at your corresponding PCB pins, then you can do the DCR and various checks on the layout editor

 

[3nity]

thanks i already did it.
:thumb:

 

[3nity]

Guys here's some mods i did thanks to Fazeka.

Wanna know what's left behind before i start the layout.

Good day

 

[Samuel Groner]

R2 is a series resistor--as shown it does nothing but providing air with electrons. Set it's value for 47 ohm. If you want an impedance balanced output, run another 47 ohm resistor from AGND to pin 2 of GS1 (pin 3 of the XLR connector).

Otherwise it looks fine now, apart from a few visual things (but I feel these are important as well, especially if you do more complex schematics later):
* renumber the parts (see my previous post on this)
* use a part type/value for D101-D103 (see my previous post on this)
* there's no point using three net labels each for the supply rails from the cap bypass section, one each is enough.

I haven't checked the pinout of the ICs, I guess you got that one right.

Samuel

 

[3nity]

still working on the layout now..

 

[Samuel Groner]

So you corrected R2..?

Samuel

 

[3nity]

yeah thank you. :thumb: