Presenting: Crowminius

nvining · Post by **nvining** » Sat Mar 28, 2015 2:10 am

Oh, that sounds lovely.

Any chance of getting the Power Supply That Doesn't Suck as an Arduino shield on its own (in some form or flavour?) It would be VERY nice for prototyping things to have a good +/-12V (or whatever we're running on here) power supply, and an Arduino, all on the same board.

JohnLRice · Post by **JohnLRice** » Sat Mar 28, 2015 2:19 am

Impressive work Mr. Old Crow sir!

brother303 · Post by **brother303** » Sat Mar 28, 2015 3:38 am

Indeed, very cool!

Respect!

seepaxton · Post by **seepaxton** » Sat Mar 28, 2015 6:39 am

This sounds excellent!! How do you rate the build process, would you say it a particularly hard build?? Is there lots of matched transistors and tempcos to worry about

nidas · Post by **nidas** » Sat Mar 28, 2015 8:39 am

Awesome ! Looking forward to start with this.

oldcrow · Post by **oldcrow** » Sat Mar 28, 2015 9:27 am

The build, while tedious, is not bad. There are no esoteric parts here, except possibly for the reverse-log taper pots and those are at Small Bear and other vendors. There are three surface-mount temperature-compensation resistors which I got from Digikey. These are the only SMT parts on the board, and I provide through-hole pads as an alternate. The four LM3046/3086 transistor arrays are the only matched transistors.

--Crow
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seepaxton wrote:This sounds excellent!! How do you rate the build process, would you say it a particularly hard build?? Is there lots of matched transistors and tempcos to worry about

ThecureForSin · Post by **ThecureForSin** » Sat Mar 28, 2015 5:51 pm

What's the footprint? Just considering an actual case. Or if you'd be kind enough to share the file for your top layer to get all position....

oldcrow · Post by **oldcrow** » Sat Mar 28, 2015 6:14 pm

It is 8.5" x 11" (216mm x 280mm). I use a small aluminum attache case similar to http://www.aliexpress.com/item/Spring-2 ... 14832.html

I have a wooden insert in the case to mount to board.

--Crow
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ThecureForSin wrote:What's the footprint? Just considering an actual case. Or if you'd be kind enough to share the file for your top layer to get all position....

ultravox · Post by **ultravox** » Sun Mar 29, 2015 4:29 am

If I didn't already own a Voyager I'd be all over this!!

Nice work Mr. Crow!

tIB · Post by **tIB** » Sun Mar 29, 2015 4:37 am

Outstanding!

timothyjr · Post by **timothyjr** » Sun Mar 29, 2015 6:07 pm

oh wow yesssssss. between this and the crOwBX you're getting me very excited.

gwaidan · Post by **gwaidan** » Sun Mar 29, 2015 6:27 pm

Lovely demo-sounds very promising!

Noiseconformist · Post by **Noiseconformist** » Mon Mar 30, 2015 2:21 am

Great project, as always!

I'd love to hear some percussive sounds across its audio range, recorded completely dry.

General_Dimi · Post by **General_Dimi** » Mon Mar 30, 2015 7:22 am

Killing it! Very nice, looks like a fantastic excuse to get into more DIY stuff.

msghmr · Post by **msghmr** » Mon Mar 30, 2015 1:30 pm

When can we buy a board?!?!

oldcrow · Post by **oldcrow** » Tue Mar 31, 2015 1:17 am

I am finalizing the board revisions to submit at the end of this week. I figure they will be back from the board house mid-April. I am currently building online BoM lists at Digikey and Mouser to make a parts order more efficient.
Total for the parts from Digikey/Mouser is just under US$190. More later.

--Crow
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colorbars · Post by **colorbars** » Tue Mar 31, 2015 10:39 am

$190 for parts, $100 for pcb... A minimoog for under $300

crustibooga · Post by **crustibooga** » Tue Mar 31, 2015 12:37 pm

Tasty - very tasty!

paulstone · Post by **paulstone** » Tue Mar 31, 2015 1:21 pm

Great project

interested in making one

Dude163 · Post by **Dude163** » Tue Mar 31, 2015 2:02 pm

Ill get one!

Will the PCBs etc be available in time for my 50th bday in July!

cheers

D163

Altitude909 · Post by **Altitude909** » Tue Mar 31, 2015 2:14 pm

outstanding. a DIY moog project of this scope is exactly what the world needs.

latigid on · Post by **latigid on** » Tue Mar 31, 2015 2:31 pm

And funnily enough, not one but two!

viewtopic.php?t=126711

The version of M. Delgoulet seems to have the more traditional layout, no offence to M. Crow but the knobs look a bit too tightly spaced?

mOBiTh · Post by **mOBiTh** » Tue Mar 31, 2015 3:45 pm

oldcrow · Post by **oldcrow** » Tue Mar 31, 2015 4:14 pm

I'd heard of this, one reasons why I didn't go for a euro-style build on Crowminius. I had a different idea in mind, which is the great thing about DIY.

My controls are tightly spaced, a constraint of the aluminum case that got me to devise this thing. In practical use I've not found it a real problem though. I wanted a portable, self-contained machine and here it is.

I might make a larger control panel board that would connect to the main board through friction-lock headers for each control position except the rotary switches which would need harnesses. We'll see. I need to get rev1.1 boards stocked first. --Crow

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latigid on wrote:And funnily enough, not one but two!

viewtopic.php?t=126711

The version of M. Delgoulet seems to have the more traditional layout, no offence to M. Crow but the knobs look a bit too tightly spaced?

oldcrow · Post by **oldcrow** » Tue Mar 31, 2015 4:18 pm

I'll have them in mid-to-late April. Working out the final entries of the online shareable project BoMs at the moment. Folks will be able to login to Digikey, select my Crowminius v1.1 BoM and order it. Same for Mouser. --Crow

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Dude163 wrote:Ill get one!

Will the PCBs etc be available in time for my 50th bday in July!

cheers

D163

MOD WIGGLER

MOD WIGGLER

Presenting: Crowminius