[sdiy] PC board from artwork?

[KA4HJH]

> On Oct 20, 2016, at 2:20 PM, Tim Ressel <timr at circuitabbey.com> wrote:
> 
> Hi,
> 
> I made a Scope Art box a while ago. It was a lot of fun but it didn't work well with the digital scope I have. I gave it to the guy I gave my analog scope to. Now I want another one so I made a Eagle project. I have the schematic done:
> 
> https://www.dropbox.com/sh/kx0p5rro4uq56am/AAACVV-Ok9PsBeIjgf9E98nMa?dl=0

The schematic is OK but the board is messed up. There's one IC and three resistors on it and all the other components a jumbled together off the left side of the board.


> Fingers crossed the link works. I converted to TL084s because the 4136s have a funky pinout, and I don't have any on hand. I tried to keep the same ref degs as the schematic. Feel free to design review the schematic.

It looks very familiar.  ;)


> Where to go from here? Since I'm a eurorack designer I was thinking of making this a single board project with the pots on the board and 3.5mm jacks for the output. Thoughts?

The level pots are not critical but the frequency pots are very touchy. Getting a pattern to stabilize requires very careful tweaking. I used .75" knobs and they're just barely big enough. I'd recommend at least 1", 1.25" would be even better. A eurorack panel would have to accommodate this. A pair of coarse and fine pots would be very clunky to use and take up even more space. 


BTW, another list member is also working an improved version with sine shapers. Does anyone have ideas for other new features? A little chaos perhaps? My imagination is shot at the moment as I'm working on this year's Halloween masterpiece.


Terry Bowman, KA4HJH
"The Mac Doctor"