I'm developing a neww pcb for the OPL3 Module

[selfservice]

the size of the hole is 0.85mm, the size of the etched hole in the copper before drilling (to center the bit) is fixed by the cad and can't be changed but is sufficient enough to give a perfect alignment of the drilling bit.

[DragonMaster]

Oh, by the way, is the LPF absolutely necessary, will the module sound too raw without it? (Trying to simplify things)

[selfservice]

I think another LPF is not necessary, the distortion introduced by this poor filtering is distinctive of this kind of sinth

[DragonMaster]

Hi, I don't want to add an LPF, but to bypass the one on the current OPL3 module.

[AndAway]

Hi

There is an easy way to change holes diameter in eagle.

While in board editor click ULP and select 'drill-aid.ulp'.

Regards

Edit: I use 0.2 mm.

[selfservice]

Hi guys, I apologize for my absence, I was really busy.

Now I have some spare time and i want to complete the project.

To start, I've fixed some broken links to the alternative PCB in the wiki and added some new photos to my website www.splabs.it

I hope it's useful for someone.

Stay tuned!

[monokinetic]

To start, I've fixed some broken links to the alternative PCB in the wiki and added some new photos to my website www.splabs.it

Hi, it is nice of you to come back to us :)

Thanks for fixing the links in the Wiki page, I checked them and they work.

I have not got much time at the moment as well, too much to do for University. But once I get some etching time again I will let you know.....

David