I absolutely LOVE old Yes. Close to The Edge, Fragile. So good top to bottom.

Thanks toneburst! As far as the clap "reverb", indeed it really is simple and doesn't take much real estate except one pot. It's just the decay of the filtered noise from the last clap pulse. So, I'll probably end up keeping it. I am going to start working on a decent way to add pitch CV to snare an...

That's great! I know the feeling, but that's why you've just got to keep a steady stream of projects cued up!

Yeah I think it is a CEM3396 copy for the most part. From what I understand, this chip, and some others like it were made to make it easy to make a polyphonic synth without having to mess around with individual analalog VCOs. You provide all the voice frequencies from a microprocessor or divide-down...

Thanks Kevin!

So, "Closed HH and Open HH" does actually fit. It's a weeee bit tight, but i think it works. What ya'll think?:

The reason those old FM tuner knobs feel so good is because there is a big ass mechanical system in there with a big weighted wheel that moves the tuning mechanism over a very long range. It's not a pot at all generally. And yeah, those are freakin' rad.

thats the 78L09, i think he needs the 79L09, which is looking quite hard to get these days. never thought id see that day. Oh shit, you're right. Doh! Mouser search tricked me. Dang, that's nuts! You're right, only 1 version of the negative 79L09 at mouser and it's SMT. That does not seem like a pa...

Where are you located? Why not just get it from Mouser or Digikey? 79L09 is a white bread part. It's just a 9V positive linear regulator.

https://www.mouser.com/ProductDetail/ST ... Wr5A%3D%3D

Thousands in stock, 46 cents.

htor wrote: ↑

Fri Oct 23, 2020 2:52 am

beautiful module, mister. i don't know how you do it.

suggestion for panel if you have room.
what about using "C. Hat, O. Hat" instead of "CH" and "OH" to go with general style?

Thanks! I could do that if makes more sense. Or what about C. HH, O.HH? Lemme play around and see what fits OK.

Any chance of having a Pitch CV? I don't think it would be possible to squeeze in at this point. The way most of these Roland-type drums work is that they use a damped oscillator design, not a VCO. So to change pitch, I am actually putting a pot on the first "pole" of the RC filter in the loop. To ...

And a pic of the new layout on the completed Beta2 proto:

A quick little house demo fucking with the new pitch controls a bit:

https://soundcloud.com/saywaht/ad110-be ... ype-demo-2

Anyway, I do not think an eventual kit would have the logo, the exact same panel or the same circuits. An update is much needed: MIDI, response to velocity, larger patch storage, etc, etc. I do not see it being offered as a Memorymoog clone, but as a synthesizer inspired in the Memorymoog look and ...

Ah, yeah you're right. Hardly any difference -55 to 125C but the min and max part wise is quite large!

Oh man, yeah that will be a problem haha. You shouldn't have caused any other damage putting that BJT in there instead of the votlage regulator except maybe frying the BJT that you're going to take out. The 9V regulators are involved with the voltages for coarse and fine tuning and the reference pit...

thanks for grabbing that. unless the input to the first stage is something less square, i guess we can assume that this oscillator is also dependent upon internal CMOS thresholds for frequency. Yeah, I think so. I would think the threshold tolerances might be tighter on a standard inverter like thi...

I have not read this whole thread but I see you are using a "mister" type of coolant dispenser. I am a machinist and sometimes do about the same things you are doing with Aluminum panels. One trick that I have found out is to use isopropanol as a coolant. A machinist would call what comes out of th...

guest, i measured the i/o between the 2 inverters on the new CD4049UB cymbal oscs. Pic below. All the frequencies are pretty damn close, at this point, one can't do better because these film caps pretty much only go to 5% tolerance. I selected ones that were within more like +/-3% and got these freq...

2nd time's a charm! Tonight's success on ye old 6040:

lusoman wrote: ↑

Wed Oct 21, 2020 3:52 pm

Well, looky what turned up from SynthCube this morning:

IMG_2188.JPG

lusoman is very excited...

I also started running the mister with the flow cranked way up, and yeah it actually mists instead of sputtering liquid all over. Much better. Oh, interesting what psi is the airflow running at? I have my air at 20 psi and them slowly open the liquid valve until it seems misty (which is to say only...

Got some of the McMaster "Red tape" and it works great! Thanks for the reco on that. I also started running the mister with the flow cranked way up, and yeah it actually mists instead of sputtering liquid all over. Much better. Just waiting for a replacement Harvey marking tool to show up and I'm go...

Maybe it's because I started working with smd lately (better late than never) but I could see a standalone version on a single pcb with smd components and some extra controls... In any case very nice project, I can't think of a lot of DIY analog drum projects with triggers and separate outs like th...

Keyboard exlcuded in this instance obviously - assuming it has MIDI. There's no way to have the panel fit both keyboard and 19" rack. No matter what you do, it's not optimal for one or the other. Google Access Virus keyboard model and you instantly know what I'm talking about. So I totally understa...

Hot diggity dog! This is gonna be huge!