Envelope Follower PCBs (Do they exist?)

From circuitbending to homebrew stompboxes & synths, keep the DIY spirit alive!

Moderators: luketeaford, Joe., lisa, Kent

Post Reply
User avatar
valis
aliens killed bigfoot
Posts: 2132
Joined: Tue Sep 30, 2008 3:53 pm
Location: on the palouse, usa

Envelope Follower PCBs (Do they exist?)

Post by valis » Fri Feb 26, 2010 12:46 pm

I really don't want to buy a Doepfer A-119 and convert it into my format but as far as I can tell, nobody sells an envelope follower PCB. Am I correct? I know Ray Wilson sells an envelope follower with a filter but that's more of an effect than a control module.

I read in the archives about some circuits that may do the trick but it seems like this PCB should exists somewhere. Am I missing something?

User avatar
tragedybysyntax
Banned until Restitution Made
Posts: 2913
Joined: Sat Jun 16, 2007 11:39 am

Post by tragedybysyntax » Fri Feb 26, 2010 12:48 pm

Blacet I/O.... it's what I used. Really cool because you can use the env 1 and env 2 out to shape the signal a bit. And lag on env 2 out! :)
Image
- [ Custom Metalwork ] -

User avatar
goiks
Hardest Tryer
Posts: 1858
Joined: Thu Oct 16, 2008 5:04 pm
Location: bishop california

Post by goiks » Fri Feb 26, 2010 12:51 pm

mmm amplitude follower
viewtopic.php?t=13147

User avatar
valis
aliens killed bigfoot
Posts: 2132
Joined: Tue Sep 30, 2008 3:53 pm
Location: on the palouse, usa

Post by valis » Fri Feb 26, 2010 12:54 pm

Neither of these companies just sells the pcb though, right? I have to buy a kit or partially assembled board?

ooh, thanks for that link. I miss so much here somehow..
Last edited by valis on Fri Feb 26, 2010 12:55 pm, edited 1 time in total.

User avatar
goiks
Hardest Tryer
Posts: 1858
Joined: Thu Oct 16, 2008 5:04 pm
Location: bishop california

Post by goiks » Fri Feb 26, 2010 12:55 pm

i think you are correct but it would seem preferable to buying an a-119 to take apart

User avatar
valis
aliens killed bigfoot
Posts: 2132
Joined: Tue Sep 30, 2008 3:53 pm
Location: on the palouse, usa

Post by valis » Fri Feb 26, 2010 1:19 pm

goiks wrote:i think you are correct but it would seem preferable to buying an a-119 to take apart
Yeah, you're probably right about that..

User avatar
tragedybysyntax
Banned until Restitution Made
Posts: 2913
Joined: Sat Jun 16, 2007 11:39 am

Post by tragedybysyntax » Fri Feb 26, 2010 2:10 pm

pssh.... fuck it. Take it apart! Be the first one to chop shop a a-119!

I chopped an Oakley lag and stuffed it in a sequential switch panel. Also an MFB Dual LFO into a frac ear.! :)
Image
- [ Custom Metalwork ] -

User avatar
Hi5
Super Deluxe Wiggler
Posts: 2608
Joined: Sun Dec 07, 2008 4:03 pm
Location: chicago

Post by Hi5 » Fri Feb 26, 2010 2:22 pm

full wave rectifier followed by a lowpass filter with a cutoff around 15-20hz. that is all it is. add a comparator on the output for gates.
you could stripboard this easy.

User avatar
krisp14u
Oakley4All!
Posts: 1176
Joined: Fri Jan 25, 2008 4:19 pm
Location: UK
Contact:

Post by krisp14u » Fri Feb 26, 2010 2:36 pm

Cheers :guinness:

Paul
www.krisp1.com/store/
Fine Modular systems Built in Yorkshire UK EU Planet Earth

User avatar
numbertalk
Hunnert Buck
Posts: 300
Joined: Thu Oct 16, 2008 11:57 am

Post by numbertalk » Fri Feb 26, 2010 5:23 pm

http://www.oakleysound.com/follower.htm

Ha, oops, Paul beat me to it. I've built the deluxe version of this (with the little lag) and it's awesome.

User avatar
valis
aliens killed bigfoot
Posts: 2132
Joined: Tue Sep 30, 2008 3:53 pm
Location: on the palouse, usa

Post by valis » Fri Feb 26, 2010 7:00 pm

Good info everyone. I have a few more options to consider that I didn't know about.

My DIY modular (rev. 2.0) is finally taking shape and I'm gettting super-excited..

User avatar
NV
Super Deluxe Wiggler
Posts: 2555
Joined: Tue Jul 08, 2008 7:40 pm

Post by NV » Fri Feb 26, 2010 8:37 pm

The Oakley EFG is about as good as it gets - LEDs for reference, a fast and slow CV output for the envelope follower, a solid gate extractor with a unique response control, and a high quality pre-amp. Everything you need from this type of circuit on one PCB.

Post Reply

Return to “Music Tech DIY”