Just finished up the Schematic and assigned the first half lol.
This will be my first powered PCB based on someone else’s stripboard layouts and schematics.
Really hoping I lined up the trimpot, and 2 b1m pots correctly!
Really hoping I lined up the trimpot, and 2 b1m pots correctly!
3 Likes
Looks like you’re missing some feedback on U3B.
I would also suggest adding a “sample clock” input that overrides the built-in oscillator when something is plugged in.
3 Likes
oh good call - lost something when moving things around. lmao.
I would have caught it in the morning but now I can fix it before bed lol.
1 Like
Have you considered using the LF398 ( S&H in a chip )?
If I understand the circuit correctly your S&H seems to sample the white noise source only. You could add an input to the circuit which disconnects the white noise source and allows for an external signal to be sampled. If that were e.g. to be a triangle wave, you would have ‘randomly’ sampled values of that wave that could e.g. produce a rising and falling pattern.
2 Likes
I am going off of someone else’s design… I’m not making alterations to something that is already verified and tested… as I am by no means an engineer. Lol.
However, yes, I was considering adding another jack for external sampling lol,
Couldnt I just use a switched jack for that part?
So when nothing is plugged into the jack - it has the White Noise as a Source.
Like this?
3 Likes
Looks like the way I imagine Behringer Crave works. You can patch in an external audio source and it switches out the white noise.
2 Likes
Yes, that should do the trick. Not that difficult to mod that part of the circuit. I just mentioned the LF398 because the S&H circuit is so much simpler than the S&H-part is here.
2 Likes
Any reason you didn’t put the ICs on the same side as the other components?
yep - I had EVERYTHING, traces, copper fills, etc. finished… and realized the footprints were all on the topside silkscreen…
you try moving an IC from top to bottom after you route all the traces and tell me how it works out… bahahahaha. 
Literally the only reason.
2 Likes
(this belongs in this topic, suggested fix here 
)
2 Likes
I see you haven’t added the external input to the design. Why not?
??? The very bottom jack on the left hand side is Ext. Sample In
It’s also switched - so that if nothing is plugged in the Sample source is White Noise.
Oh, I was looking at the pdf in the github repository. I can’t find it in there. Or am I missing something?