My build progress

It might be fine in this case, but generally it’s best practice to connect all 10 pins of the power header to the power rails. Otherwise you’re using only a few of those 28 AWG ribbon cable conductors to carry all your current.

2 Likes

Matching transistors for @sebastian’s kassutronics ladder filter using a simple (3 resistors and a diode) circuit by Ian Fritz:

The transistors from mouser (BC547C-A1) were all very close matches right out the bag, triple zeros on the volt meter for most, some 0.001s.

I also had some some tayda just “BC547.”

These were not nearly as matchy as the mousers, with readings ranging 20mV difference.


Haven’t messed with any of the trimmers and it sounds and feels fantastic! Easily self oscillates with a nice clean tone. And it looks great!

8 Likes

thanks Eddie for the great build-blog , easy to follow and great pictures plus the extra info of your personal experience building :+1: . I find that pictures of finished boards help with reference when building .

7 Likes

Thank you very much for that vote of confidence my friend, I really appreciate it. I heard from more people that they really like the pictures as reference. But if you’re ever building one of my projects and you find you need a specific picture that’s not on the website yet, you can always contact me and ask for it. It’s no problem.

7 Likes

You mean wire them without using patch cables?
However you do that, you need switches (or potentiometers) to change from using them either in series, or parallel or independently. Those could be part of the jack sockets or hand operated.

2 Likes

8 Likes

Thanks. Using switching jacks seems like a good idea.

I built my #1163 Mixer. I had some leftover On-Off-(On) from the ADSR, so I wired the switches to have mute in the middle, on in the top position and momentary on in the bottom position.

9 Likes

I’ve had a ponder. Can you indulge?

I reckon I can get series and parallel this way:

Connect output 1 to to the switch output.

Connect the output 1 switch to input 2.

If I’m visualising this right then:

With both inputs are receiving a different input the both outputs are independent.

With only input 1 is used, Output 1 will be delay line 1 and output 2 will be both delay 1 and 2 in series;

By multing the same signal to inputs 1 and 2, then mixing outputs 1 and 2 iboth delays are parallel.

1 Like

Good morning from Germany! Unfortunately yesterday it was too late to post any progress. But yesterday I got 4 panels ready and @EddyBergman 's Noise Module completely finished except for the potentiometer caps. Everything in Eurorack size.




10 Likes

Excellent work! Looks very professional.

3 Likes

I might just have to spray paint these panels (my best attempt yet I reckon) - 2 matching karaoke delays

Horrible knobs though

2 Likes

I think knobs are extremely important !! I’ve started with these blue or red and black, hold the cheapest. They always look like you’re in an electrical laboratory. Which is also cool sometimes. But let’s not kid ourselves, the Davies 1900 clones or MPX style buttons just look nicer! And give the module IMMEDIATELY a different charisma.

1 Like

The rat v1 lives. Next steps: play it a bunch to figure out what I want to modify. I may also add a power starve.

To power it (as it’s 9V), I built a 12V to 9V converter that I so aptly named the “9 to 5” because my brain apparently doesn’t work. I renamed it after I took the pictures lower odds of future idiocy. It’s designed so I can use it with other pedal modules if I want. It has three pin molex connectors because I ran out of two pin (new heck standard?).

And I mounted that in the back of my top case.

And here’s it all back together again:

Achievement unlocked: First full case

16 Likes

Smart. I’m definitely doing this. How did the fix to the VCO go?

1 Like

If you move it a bit more to the right, it will look like all those pipes are coming out the top.

7 Likes

Can you upload a picture of a drawing of the schematic you imagining?

@heckseven waht is the rat v1? Is it the rat distortion? (i guess not,or?)

BTW here are the almost finished modules with the panels i builded.
The knobs are not the final ones like you see. @Mcshafty the red ones i was talking about in my last post :slight_smile:

8 Likes

Yep. It’s a version of the rat distortion pedal.

1 Like

Which subosc circuit is that? :smiley: