Vertigo

[cooder]

Vertigo, built on pedalpcb Mesmerizer pcb.
Very cool modulation sounds in the vein of vibes, phaser and tremolo.







I had trouble getting this to work properly, initially all populated it worked but sounded off and did not work evenly over range of controls. Checking voltages it showed that the charge pump circuit didn't deliver the 18V to point Vcc on schematic as it should.
And I scratched my head how it could have, I couldn't quite understand how it should have according to schematic.
Turned out that there was an error on schematic and subsequemtly on the board. I contacted BuGG / Robert and he was helpful, saw me right after discussing this.
So if you also have this problem, if you want to get this board working here's how I fixed it:
I got it working in the end by circuit hacking an external charge pump board into it by connecting the 9 V input of charge pump board to pin 1 or 8 of the IC socket on board, the 18V output of external charge board to pin 7 on pcb and the ground of external charge pump board to pin 3 on pcb.
Works now like a champ and sounds great. Unfortunately I forgot to take a gut shot of it. It's now with a friend out of town who wanted to give it a spin and he's quite liking it too... he might be twisting my arm.

[cooder]

Found the gut shot in the recycle bin...
You can see the extra charge pump board wired up there.

[mjg]

Nice save!

Wow, that graphic really lives up to the pedal name. 

[alanp]

Nice build What does this circuit do? I don't recognise the DIP16 chip... XR2206 function generator?

[somnif]

Nice build What does this circuit do? I don't recognise the DIP16 chip... XR2206 function generator?

Its a Catalinbread Pareidolia, a sorta kinda 2 stage phaser-ish, vibrato-y, harmonic tremolo thing.

[jubal81]

Nice build What does this circuit do? I don't recognise the DIP16 chip... XR2206 function generator?

Very cool and discontinued chip. LFO generator with minimal external parts.


Nice one, Cooder. I'm impressed you stuck with it. Not an easy fix.

[dan.schumaker]

Nice!  I have that same pedal with issues in my "I'll-look-at-it-later" pile.  I'll give that hack a test and see if it helps out!

[Hirti]

Nice looking pedal!

Nice!  I have that same pedal with issues in my "I'll-look-at-it-later" pile.  I'll give that hack a test and see if it helps out!

Same here. Have to take a look at it again.

[cooder]

Cheers guys, yes it's a cool sounding circuit! Unique in it's vibe/phasery sound. Glad I got it working and I recommend to you guys to give this fix a shot, once you look at schematic and take out the chargepump chip from original location on board it's not that hard to butcher it in.
Need some chargepump board like the Road Rage or so. I used a home etched one.

Hope this is of some help so you get it working too!

[dan.schumaker]

Thanks for the tip!  I just did this on mine, it fired right up!

[cooder]

Thanks for the tip!  I just did this on mine, it fired right up!

Excellent!

[pickdropper]

Man, you are on a roll.  I dig those acrylic plates you make.