Thomas Henry's SN76477 Super Controller Module

Tronato · Posted: Sat Sep 22, 2007 7:04 am Post subject: SN76477

Hello again!

Sorry to hear the PC boards are sold out.
Will there be a new batch or that's it?
Does anybody have an extra board?
Thanks in advance!
Tro

julianw · Joined: Jul 30, 2007 Posts: 78 Location: UK

Darn,

Knew I should of ordered some of these, got caught up in some other projects and completely forgot - If you plan another run, I'd definately take two, I don't mind paying upfront either.

Julian

janvanvolt · Joined: Nov 24, 2005 Posts: 285 Location: Mainz, Germany

@fonik:

i finished my MOTM version of the 76477, however i am curious how the INITIAL and SWEEP should work on that module.

i tried to adjust T2 according to documentation, but i just don't see a change on the oscilloscope. cabling is correct now (fixed some wrong wires) and should be working IMHO.

All of the rest is working.

Thanks for the great module !
Photos here: http://www.flickr.com/photos/jczmok/sets/72157603370942917/

serenechaos · Joined: Aug 04, 2007 Posts: 13 Location: lost alamos

SWEET!
Where'd you get the panel?
(I need a MOTM format one, that looks real nice).
Robert Smile

fonik · Posted: Tue Dec 04, 2007 2:08 am Post subject:

hi jan,
congrats on your nice module. you did a neat job as usual!

philpeery · Joined: Nov 08, 2006 Posts: 137 Location: new jersey, usa

janvanvolt · Joined: Nov 24, 2005 Posts: 285 Location: Mainz, Germany

synthmonger · Posted: Mon Aug 18, 2008 5:15 pm Post subject:

Couldn't you add a simple mod of voltage control over the noise filter by connecting an NPN as a current sink to pin 5? Or expo control?

Tronato · Posted: Mon Sep 15, 2008 6:32 pm Post subject:

Hello!

Is there anyone of you fine gentlemen interested in a brand new unpopulated PCB of the Supercontroller?

PM me please....

Thanks!

TRON

EDIT!

SOLD less than 2 minutes after I posted this!

andrewF · Posted: Sat Oct 18, 2008 2:36 am Post subject:

Turned this module on today for the 1st time - works perfectly
Well done Thomas for the design and Fonik for the PCB.

The noise is really different and useful, flicking thru the range switch really changes the waveform.
S&H...I have never appreciated S&H before but my opinion has now been inverted Embarassed

This is a super module!!

Appliancide* · Posted: Sat Oct 25, 2008 1:55 pm Post subject:

If anyone has a pcb that they are willing to part with, I'd be happy to take it off your hands.

camelneck · Joined: Sep 27, 2008 Posts: 68 Location: KY (USA)

The portion of the schematic involving the Noise Sweep is very perplexing to me. I have no doubt that this circuit works, but I'm having trouble understanding how it works.

Some time ago, I experimented with this IC. Although I didn't use a CV to sweep the noise clock, my circuit did have a pot which controlled the frequency of the internal noise clock, and this circuit was connected to pin 3 (and I think pin 4 also).

On Fonik's schematic, the Ext CV input, which is used to sweep the noise clock, is applied to pin 16 (Ext VCO Control). How can this pin be used to sweep the noise clock when it is for Ext VCO Control? Why not use pin 3? (Even the SN76477 datasheet recommends pin 3 for this purpose.)

Can somebody please explain how it is possible to sweep the noise clock using pin 16?

Thanks,
David

fonik · Posted: Fri Nov 14, 2008 5:08 pm Post subject:

Tronato · Posted: Fri Nov 14, 2008 5:38 pm Post subject:

Hello!

Is there a document somewhere explaining exactly what it is that this module does or can do?

Thanks!

TRON

fonik · Posted: Sun Nov 16, 2008 12:31 pm Post subject:

just see 1st post in this thread. technical details of how THs circuit actually works can be found in the polyphony article and in the book.

intellijel · Joined: Sep 10, 2006 Posts: 67 Location: Vancouver, BC

Hi Fonik,

I just wanted to clarify which controls reset/restart the LFO?

e.g.
With the delay trig in, after the delay time does the LFO always start at the beginning of it's cycle?

When you assert a gate signal, does the LFO start it's cycle? etc..

thanks!

fonik · Posted: Thu Feb 26, 2009 1:19 pm Post subject:

intellijel · Joined: Sep 10, 2006 Posts: 67 Location: Vancouver, BC

Awesome! Not enough designs take into account the need for syncabe/resettable parameters so that we can do rhtyhmic stuff Smile

While I have your attention, I couldn't see anything in the notes about 12V (eurorack) operation. Do I need to change any resistor values?

fonik · Posted: Fri Feb 27, 2009 2:16 am Post subject:

if anyone build his super controller for 12V operation he might chime in here.

maybe you won't have to change anything. most critical parts are referenced to the onboard 5V anyway. however, you could adjust R55 and R56 (schematic page 3, page 6 of documentation). lower their values to widen the range of the potentiometers if needed.

aerogramma · Posted: Wed Mar 04, 2009 6:17 am Post subject:

just wanted to express my appreciation here for the excellent job done, once again, by mr. fonik

excellent project, excellent comms, excellent delivery speed, first quality PCB and docs

just shows things CAN be done differently!

thanks

Wink

aero

fonik · Posted: Wed Mar 04, 2009 8:07 am Post subject:

thank you for the kind words, aero,

however, i have to say one word about quality. these boards are just a reorder of the 1st run from expressPCB. it is leadfree ROHS and i strongly recommend to store it not too long, or if you want to put it on the shelf for a longer time, store it in a small bag with silicon if possible, in order to keep it dry as possible.
i you one day find the pads have become dull just sand it carefully.

that's part of the ROHS-deal?!

aerogramma · Posted: Wed Mar 04, 2009 8:34 am Post subject:

no worries it wont be on the shelf for long Wink

Luka · Joined: Jun 29, 2007 Posts: 1003 Location: Melb.

hey matthias

i'm just designing my panel at the moment
im wondering if you can confirm all the normalised connections in the panel
since im am using bananas i need to add a switch for each

so far i have noted

+5v > Gate in
noise out > s&h in

also your panel suggests to me that all of the pots are reversible attenuators/control. is this correct?

i have also noticed you do not have the hold function on the lfo any more?
was there a reason for removing this?

and lastly is the much difference between the gate and square output on the lfo?

here is my current design
would appretiate any hints on functional errors

Posted Image, might have been reduced in size. Click Image to view fullscreen.

Posted Image, might have been reduced in size. Click Image to view fullscreen.

fonik · Posted: Mon Mar 09, 2009 5:07 am Post subject:

nice panel, luka!