Infinitphase vero.

[digi2t]

Bro... I've never drawn a PCB in my life!! I wouldn't know where to start. Personally I would have loved a PCB of this to work with instead, but there just isn't enough cards in my deck to make that happen. But, at least the schematic is verified now, so if someone whats to pick up the torch and whip up a PCB, may the Force be with you!

Honestly, I find it a worthwhile build, despite it's size. It's got a lot of horse power under the hood. I'm glad I built it.

I'm going to introduce it to 'Cuz Lewdvig tonight. 

[slacker]

I'm lost for words, that's an amazing bit of kit, nice work.

[SmoothAction]

Damn this is a humbling thread    Crazy good job man 

[digi2t]

I'm lost for words, that's an amazing bit of kit, nice work

Thank you Sir.

I'm still weeding out some very minor noise issues, but it seems that shielded cable does the job nicely. It's not that noisey per se, but I'm nitpicking. I'm just going through it again, with the amp cranked, to try and pin piont any stray signals. The worst culprits for noise are the two lines feeding the Blend pot, especially the dry side, it's a real antenna. I've already swapped out the wet side for a coax, I'm going to do the same for the dry. Nice thing is that the center pole is ground, so I can solder my shields there.

Lots of signals flying around in there, so besides keeping the wiring in check, there will have to be some wires that will need to be shielded. I'll report which ones, once the dust settles.

Damn this is a humbling thread    Crazy good job man 

No worries dude. Every day that I check through this forum, I'm humbled. I would have never pulled this off if it wasn't for the tons of info, and all the fine folks, in this forum. Thanks brother!

[digi2t]

OK, I've gone trhough it, and I've found that for max noise suppression, the wires for the Resonance, Blend, and CV-Mix pots should be shielded. They are the most prone to pick up any stray signals flying around in the box. The Blend pot is easy, the center pole is ground, so the shields for the wires on either side can go there. The Resonance pot is the same, one of the pot poles is ground, so both shields there. The CV-Mix pot is different, you have to bring all the shields to the board. Two wires are on the same side, and very close together, so I soldered the sields together to a small jumper, and plugged into a ground line on the board. Same deal for the third wire, on the other side of the board, small jumper to ground for the shield.

The only tick I have left is when I crank the Blend knob to DRY. It's faint, and I have to really crank the amp for it to be noticable. It disappears at 100% WET. I might poke around a bit more to see if I can mute it, but it really doesn't bother me that much.

Another thought; Light from the backside of all those LED's flashing around inside the box affecting the LDR's. For the step LED's, I cut a strip of opaque black plastic, and laid it over top of the row. For the footswitch LED's, I applied black nail polish to the backside of each LED. 4 or 5 coats does the trick. This keeps the back lights for the LED's from possibly corrupting the LDR's.

So far the most surprising thing is that lack of an output volume, hasn't really bothered me. Generally, I always install at least an output pot, just so I can keep things balanced in a chain. I've noticed that there is a 1M resistor to ground at the end of the audio line, I may just make that a pot to ground instead.

Back to fiddling...

[garcho]

You should do an all-vero modular sometime Dino. Or am I years late with that suggestion? 

[digi2t]

You should do an all-vero modular sometime Dino. Or am I years late with that suggestion? 

Do you mean separate up the component, i.e. LFO on one board, audio on another, etc? I've thought about it. It would certainly eliminate any possible crosstalk from the board itself. I tried really hard to divi up the real estate on my vero though. That's why I laid out three parts on the main board, and I tried to keep any jumpers from crossing territories the best I could. Mounting the LED driver on a daughterboard was partially to save space, but I was afraid that it's output would cause popping if it was too close to the audio.

One thing for sure, this sucker was one big fat lesson on grounding. It's the first time I've had to deal with "technical (or digital) ground". I really had to pay attention to what's going where.

[garcho]

i meant modular synths! start cramming things into euroracks    certainly wasn't giving any advice

[digi2t]

i meant modular synths! start cramming things into euroracks    certainly wasn't giving any advice

DOAH!!

DUH!!

(forehead palm smack!)



It's probably going to end up sitting on top of this;



Yup... probably gonna give it a place in the Penthouse. 

[digi2t]

Having had a week to bake my brain in the hot Dominican sun, I finally worked out the last ticking kink. The unit is now much more "tick free", especially on the dry side, than before. Although it wasn't that bad before, I can now crank the amp to an insane level, and just barely hear the LFO at full dry. I figure I've reduced it by about 75%, over what you saw in the video. I've been testing with my Ampeg G-212 (120W), an amp where anything over 5 on the volume is equivilant to killing a mouse with a nuclear bomb. "Insane level" = 7, or higher.

I realized that having the Rate 1 wire and strip running near, and under, a section of the audio part of the board was probably "a bad thing". So I added another jumper, and a couple of cuts to completely isolate the LFO noise from the audio section. I also moved, and boosted C999 to 22uF. As the guy on Silent Library says, "SILENCE!".

The wires from the board to the following pots MUST be shielded for the best results (not including the ground wires for the Resonance and Blend pots); Resonance 2 & 3, Blend 1 & 3, and all CV Mix wires.
CV Mix shields are soldered to the board, AND ALL SHIELDS SHOULD BE SOLDERED TO THE SAME SIDE OF THE BOARD, as shown in the vero. This will prevent any chance of any LFO noise from entering the steps when you're in max STEP mode. Don't be tempted to ground CV Mix 1 & 2 shields to that side of the board, or else you'll be looking for trouble. Run a jumper wire across to the CV Mix 3 wire side. Blend/Resonance shields use the ground pole of their respective pots.

ALL Input and Output wiring should be shielded as well! The unit is dead quiet now, and a real joy to play with.

I've updated all the veros in this thread, and I'll put together a PDF soon in the Gallery, with all the info. Here are the updated veros;



Updated cuts highlight. THE 9 CUTS FOR THE LED DRIVER BOARD UNDER THE LM3914 (U301) ARE NOT ON THE MAIN BOARD!







Again, an epic build, but the payout is worth the effort. Now can SOMEONE please draw up a PCB for Greg!!  

[Govmnt_Lacky]

Now can SOMEONE please draw up a PCB for Greg!!  

   

Maybe someone is already in work on the PCB for the next COMPETITION 

Speaking of which.... 

[haveyouseenhim]

Now can SOMEONE please draw up a PCB for Greg!!  

   

Maybe someone is already in work on the PCB for the next COMPETITION 

Speaking of which.... 

Cant wait!

[garcho]

why not build that thing in a rack chassis? I mean, besides paying 50 bucks and having to drill steel...  

EDIT: not that I dislike your pedal enclosure, on the contrary, I think it looks fabulous

[digi2t]

why not build that thing in a rack chassis? I mean, besides paying 50 bucks and having to drill steel...  

EDIT: not that I dislike your pedal enclosure, on the contrary, I think it looks fabulous

Yeah Gary, you're right, it would totally work in a 1U rack as well. Not only that, but with a MIDI card from Highly Liquid, it would be real easy to MIDIfy some of the functions as well. But, for my use, I prefered to be able to put it down on the floor as well. That's why I added the footswitches for the 4/8 stage, and Rate speed.

[digi2t]

OK, build doc is done. You can get it here;

http://www.aronnelson.com/gallery/main.php?g2_view=core.DownloadItem&g2_itemId=48753&g2_GALLERYSID=0aeebe7cd1fb71927bdc09d18e7b17e7

If anyone needs more info, you know where to find me.

[armdnrdy]

Beautiful project documentation!

Great job!

[digi2t]

Sorry folks, I realized last night that I had no info on tuning in the doc. I've updated it, and it's available here;

http://www.aronnelson.com/gallery/main.php?g2_view=core.DownloadItem&g2_itemId=48757&g2_GALLERYSID=388d68c3a4016869a255cebd611500c9

I hope my explinations on tuning are adequate. If anyone has comments or concerns, just hollar.

[Govmnt_Lacky]

I have a concern dear sir...

Can you lay off the awesome and incredibly complex projects? 

Can a brother get a simple booster or OD or something? 

Stay thirsty my friend!

[digi2t]

I have a concern dear sir...

Can you lay off the awesome and incredibly complex projects? 

Can a brother get a simple booster or OD or something? 

Stay thirsty my friend!

I'm looking at this right now;



I've rounded up all the parts, and cleared out the bread board. But, I'm also searching for any gut info on the Schumann PLL, or the Skunq Works Blackbird.

Sooooo... a boosted OD, PWM, octave multiplying/dividing, squarewaver? Sure, no prob. I'm on it. 

[garcho]

you're in your infinite vero phase