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haxster
Joined: Feb 01, 2006 Posts: 246 Location: MONTEREY PARK, CA 91754
G2 patch files: 2
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Posted: Thu Jan 06, 2011 9:14 pm Post subject:
LM4250 VCF rev5 PCB EURORACK/FRAC run |
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NEW REV 6 IN EFFECT. IF YOU WANT ONE GO POST IN THIS THREAD:
http://www.electro-music.com/forum/topic-48995.html
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This is REV5 old thread........
I revised another version of this circuit on pcb. I made it even easier to build and it can be self mounted. I added some screw holes in case you did not want to use the pcb mount parts. I designed this to be as pro as the other companies out there.
The power connector is in EURORACK format.
The core circuit did not change. I did get rid of the Pre-amp. It was nice but I wanted to make it compact. The Bi-polar FM is still there.
Anyone who missed out on the last run please let me know if you would be interested in getting one. I am asking $17.00 with shipping included WORLDWIDE USPS.
The switch is this kind:
The onboard 3.5mm jack is this kind:[url][/url] Last edited by haxster on Fri Aug 05, 2011 11:04 am; edited 2 times in total |
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haxster
Joined: Feb 01, 2006 Posts: 246 Location: MONTEREY PARK, CA 91754
G2 patch files: 2
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Posted: Thu Jan 06, 2011 9:17 pm Post subject:
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The other IDC looking connector location is where you solder wires going to your jacks: BP out, FM in, etc. I use an IDC connector to another JACK pcb eliminating wires altogether. |
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snebenan
Joined: Oct 03, 2010 Posts: 13 Location: Sweden
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Posted: Fri Jan 07, 2011 1:14 pm Post subject:
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Awesome!
I'm interested in two PCB's.
Do you want A PM with my details or how do you prefer to gather orders?
//s |
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haxster
Joined: Feb 01, 2006 Posts: 246 Location: MONTEREY PARK, CA 91754
G2 patch files: 2
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Posted: Fri Jan 07, 2011 6:48 pm Post subject:
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I am waiting for about 15-20 pcb requests before I order them. everyone interested just post a reply how many you want and later I will remind all to gather the funds to make the order. The turn around is about 7-10 days for pcb arrival and shipping out. |
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a100user
Joined: Oct 28, 2003 Posts: 158 Location: UK
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Posted: Sat Jan 08, 2011 12:33 am Post subject:
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I'll take 1 please.
Cheers
David |
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kollo
Joined: Jun 02, 2009 Posts: 19
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Posted: Sat Jan 08, 2011 3:09 am Post subject:
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I'll take one as well! |
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rosch
Joined: Oct 03, 2009 Posts: 164 Location: germany
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Posted: Sat Jan 08, 2011 10:36 am Post subject:
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i'd like 1 also.
thanks! |
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haxster
Joined: Feb 01, 2006 Posts: 246 Location: MONTEREY PARK, CA 91754
G2 patch files: 2
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Posted: Sat Jan 08, 2011 1:12 pm Post subject:
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I made a mouse BOM. This does not have LM4250 or ic sockets though. You need to get those elsewhere. Digikey carries LM4250.
This BOM also does not include the other (5) 3.5mm Jacks needed for the other inputs. You can use your own sources.
I really recommend to get the included 3.5mm jack in the BOM even though you might use this pcb for MOTM or 1/4" jacks. It serves as a strong pcb panel mount and you can use it to connect external 3.5mm gear. I have updated the pcb with another Audio In solder hole so if you were MOTM you can have a 1/4" jack also. On the picture above 'j6' has now become 'AIN1'
http://www.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=5d03e5a824 Last edited by haxster on Mon Jan 24, 2011 1:23 pm; edited 1 time in total |
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haxster
Joined: Feb 01, 2006 Posts: 246 Location: MONTEREY PARK, CA 91754
G2 patch files: 2
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Posted: Sat Jan 08, 2011 1:28 pm Post subject:
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Here is the general part list:
2011 LM4250 VCF PART LIST
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IC:
(1) TL074
(2) LM4250
TRANSISTOR
(1) 2N2222A
CAPACITORS:
(2) 10UF 0.1" SPACING
(2) 100NF 0.2" SPACING (5.08mm)
(2) 2UF - 2.2UF NON POLAR CAP
TRIMMER:
(1) 100K MULTI-TURN TRIMMER
POTENTIOMETERS:
(1) 10kK LINEAR
(2) 100K LINEAR
RESISTORS:
(6) 1K
(7) 10K
( 8 ) 100K
(1) 150K
(2) 1M
(1) 27K
(2) 10R-22R PROTECTION
(2) 200K
(1) 3K
(1) 4K7
(2) 47K
CONNECTORS
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(1) IDC 16 PIN HEADER (8X2 DOUBLE ROW) 0.1" SPACING
THIS IS FOR EURORACK TYPE POWER CONNECTION.
OPTIONAL:
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(2) SPDT TOGGLE SWITCHES FOR REZ HACK SWITCHES. ONE SWITCH RELAXES THE NOTCH, THE OTHER PUSHES THE NOTCH A BIT MORE.
THE LOCATION FOR THIS IS LABELED H1,CMN,H2. YOU HAVE TO SOLDER WIRES TO SWITCHES IF YOU WANT TO USE THIS FEATURE.
THE CMN (COMMON) GOES TO BOTH SWITCHES CENTER PIN. H1 GOES TO ONE SWITCH, H2 GOES TO THE OTHER. Last edited by haxster on Sat Jan 08, 2011 1:37 pm; edited 1 time in total |
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haxster
Joined: Feb 01, 2006 Posts: 246 Location: MONTEREY PARK, CA 91754
G2 patch files: 2
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Posted: Sat Jan 08, 2011 1:36 pm Post subject:
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If this is your first DIY build and you own a EuroRack system I really recommend you try this out. You really can't mess up. It works at first power on, of coarse you have to turn the trimmer for proper Cutoff knob range. No measuring devices needed. It's adjusted by ear. Of coarse if you make a soldering mess and stuff the IC's wrong it will not work! Just be neat and patient.
Don't go mad trying to source the original UA Russian IC. The LM4250 has a flavor of it's own, respect it also. Just build and make noise. |
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fluxmonkey
Joined: Jun 24, 2005 Posts: 708 Location: cleve
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Posted: Sat Jan 08, 2011 4:20 pm Post subject:
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i would take 2, thx _________________ www.fluxmonkey.com |
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RSFC
Joined: Sep 02, 2010 Posts: 63 Location: space lab
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Posted: Sat Jan 08, 2011 8:11 pm Post subject:
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I'll take 1 |
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Danno Gee Ray
Joined: Sep 25, 2005 Posts: 1351 Location: Telford, PA USA
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Posted: Sat Jan 08, 2011 9:28 pm Post subject:
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I'm in for 1. |
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LektroiD
Joined: Aug 23, 2008 Posts: 1018 Location: Scottish Borders
Audio files: 2
G2 patch files: 2
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Posted: Sat Jan 08, 2011 11:58 pm Post subject:
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1 here please _________________ LektroiD |
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haxster
Joined: Feb 01, 2006 Posts: 246 Location: MONTEREY PARK, CA 91754
G2 patch files: 2
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Posted: Mon Jan 10, 2011 9:26 pm Post subject:
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I made the order today.
So far I have this list:
DEGO-SWEDEN (2)
gpmacklin - USA SF (2)
snebenan - Sweden (2)
a100user (1)
kollo -SWEDEN (1)
rosch -GERMANY (1)
fluxmonkey -USA CLEVELAND (2)
RSFC (1)
Danno Gee Ray -USA PA (1)
LektroiD (1)
reflux (1)
iopop3 (1)
RF (2)
hodad -USA Atlanta (1)
synchroton -USA (1)
Rivelen -France (1)
tazer - UK (1)
diablojoy -Australia (2)
Feel free to jump aboard there is still room for this first run Rev5.
I should have it in my hands next week. I will build and post till then. It's a really slick design. Suitcase worthy stuff. Last edited by haxster on Thu Jan 20, 2011 10:02 pm; edited 6 times in total |
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reflux
Joined: Aug 22, 2009 Posts: 3 Location: Orange, Ca
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Posted: Mon Jan 10, 2011 11:37 pm Post subject:
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I'll take 1, thanks |
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iopop3
Joined: May 28, 2010 Posts: 94 Location: Malmö, Sweden
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Posted: Tue Jan 11, 2011 2:10 am Post subject:
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I'm interested in one board.
Do you have any schema available? The pcb is rather easy to follow, but if you have a schema please post.
Any special mods needed if running on 15v? |
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haxster
Joined: Feb 01, 2006 Posts: 246 Location: MONTEREY PARK, CA 91754
G2 patch files: 2
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a100user
Joined: Oct 28, 2003 Posts: 158 Location: UK
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Posted: Tue Jan 11, 2011 3:37 am Post subject:
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Hi Haxter,
Sorry if this is a dumb question but what applications can read sch files?
Thanks
David |
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Dego
Joined: Apr 22, 2008 Posts: 139 Location: Sweden
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RF
Joined: Mar 23, 2007 Posts: 1502 Location: Northern Minnesota, USA
Audio files: 28
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Posted: Tue Jan 11, 2011 5:57 am Post subject:
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I'd like 2 please! _________________ www.sdiy.org/rfeng
"I want to make these sounds that go wooo-wooo-ah-woo-woo.”
(Herb Deutsch to Bob Moog ~1963) |
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a100user
Joined: Oct 28, 2003 Posts: 158 Location: UK
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Posted: Tue Jan 11, 2011 6:13 am Post subject:
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Thanks Dego
David |
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haxster
Joined: Feb 01, 2006 Posts: 246 Location: MONTEREY PARK, CA 91754
G2 patch files: 2
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rosch
Joined: Oct 03, 2009 Posts: 164 Location: germany
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Posted: Tue Jan 11, 2011 10:01 am Post subject:
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i can't open it with eagle.
it says something like there's invalid data in the file. |
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haxster
Joined: Feb 01, 2006 Posts: 246 Location: MONTEREY PARK, CA 91754
G2 patch files: 2
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