yeah, as a voltage divider:

i use graph paper, make a rough guess and draw it out, and then literally place the pots/knobs/switches/jacks on the paper to see if everything fits, and adjust where it's too close.

i have PCBs available for this: http://fluxmonkey.com/fluxmerch_buchla.htm. it runs fine on 12v without changes. the outputs swing close to the rail, though - i usually build mine with attenuators on the panel for each out, or voltage dividers behind the panel to bring them down to a more reasonable...

i use audacity for sound design, and reaper as a daw, and have never had serious problems. i also use audacity in teaching, and it's great for introductory musique concrete workshops because it's relatively easy to use and free. i have occasionally used it in a pinch as a crude daw for small quick p...

@fluxmonkey: that looks really good! Can you tell us which capacitors you used on your range switches, what type of switches you used and how they are wired up, please? I’ve still got to build mine... Other projects and home life getting in the way! 😀 i used 4 SPDT center-off switches. A .001 cap i...

"resonant VCF high pass-24 dB / octave"... great to hear, he has consistently solid designs.

rather pleased with how this one came out... 3-way range switches, 2-input passive mixer to the 386 amp. gonna replace one of the mixer ins w/ a passive tone control (LPF-ish). it's gnarly.

sduck wrote: ↑

Sat Oct 24, 2020 7:07 pm

Yes, they'll work interchangeably. I have both here, and have put them on top of each other - except for some small differences in hole sizes there's no difference.

excellent, thank you! this had languished in my backlog, partly because of the amount of rework required on the V1pcb...

I've only ever used EAGLE to the former end - creating artwork for a laser print - and know nothing of the additional steps necessaery for, or expectations of, a PCB fab house. All my designs are two layer thru-hole; not complicated. Also low runs, 5-10. Sounds like you have basic Eagle layout know...

has the panel layout changed since v1? I have a v1 panel, can I use it with the V4 PCB?

i build mine to run off a pair of 9v batteries... it does not draw a lot of current, batteries last a couple months unless i forget to turn it off after playing.

Awesome, thanks. I was thinking of building this and didn't fancy it on a paper circuit. It looks like you've corrected the mistake on the paper circuit as well. :tu: I've ordered two to make a double tarp, maybe with a shmance instead of the eight knobs. mistake?? :? only Allah is perfect :hail:

google "pcb edge mounting hardware" and you may find something that will work for you; i've used these: https://www.adafruit.com/product/1116

I print 2 copies: one glue on w/ rubber cement to use as a drill guide, then i strip that off and use spray adhesive (scotch77) to glue on the final paperface copy. i also often use a self-adhesive laminate sheet, with the top/bottom wrapped around and behind the panel.

with Peter's kind permission, I have made a few PCBs for the Fourses Tarp paper circuit. foursesTarp_silkscreenNaked.jpg The original paper circuit is here: https://www.ciat-lonbarde.net/paper/fourses.pdf; I've added an (optional) LM386 amplifier to make it more self-contained. More info and BOM on ...

I have also been working on a new module idea. Here is a rough sketch. Let me know what you think: I know it's a joke, but I've been thinking of a module that displays random entries ifrom Brian Eno's "oblique strategies". Would be very cool if it was voltage controlled :) I love this idea. It seem...

This is why I love Oakley. Tony!

Very nice. Does anybody have a source for the pots?

I built mine out of wood, NOT portable, came out to 27" wide x 12" deep, and i had to make custom right-angle DIN power connectors at that. Roadcases USA recently did a custom case build for me (nor for the wiard, but large). It was not as expensive as I'd thought it would be, i would recommend them...

kriaction wrote: ↑

Sat Apr 25, 2020 11:13 am

...by the way what kind of supply did you use (Never seen that brick before)?

that's a dual 9v battery case

not that it's a contest, but i think i win for oldest PCB version:
anybody have th docs? component numbering follows the original Practical Electronics numbering as far as it goes, but there's a 6th IC and associated parts on the PCB that aren't in the original schematic.

i've done this, too, and wished that someone supplied just cheeks, compatible w/ standard vector rails... I've started using vector rails for my frac cases. As I'm in Europe, shipping costs of Rak-3 were too much. It would be handy if someone made suitability sized frac side cheeks, then you have a ...

Pulled a long-ago build of the original SoundLab Mini-Synth of the pile-of-sad-project-that-never worked, poked around at it for a couple afternoons, found a couple stupid mistakes and one bad chip, et voila: she works! MFOS_SoundlabMini.JPG gutshotMFOS.jpg Added a S&H, did a lot of tweaking of comp...

taking refuge in the basement during lockdown, working on the backlog (i've got a couple years worth), found a couple Blacet VCO kits! blacetVCOs.jpg I have a LOT of VCOs, but these are still my go-to favorites - so musical, and they FM so nice. I'm also really appreciating his care and attention to...