Pete Cornish - Mystery Pedal [gooped][x-ray'd]

Seiche · Post by **Seiche** » 17 Jun 2019, 18:20

so Aion posted two pictures of an "original design" cornish pedal, one a gooped gutshot and the madlad actually apparently x-rayed the PCB lol. Not anymore info though.

I wonder what it actually is. I can see one or two opamps and two transistors, as well as a trimpot.

aionios · Post by **aionios** » 18 Jun 2019, 14:08

I'll let you guys speculate for awhile... but tracing is complete on my end and a PCB (including schematic and more photos of the trace) will be released in about 2 months, so you won't have to wait long

It's very much an original circuit though. I was surprised since most of his are either value-tweaked clones or hybrids.

Seiche · Post by **Seiche** » 18 Jun 2019, 16:49

How do you infer component values from an xray or gooped board? I assume you degooped it, or maybe took it apart and measured it?

aionios · Post by **aionios** » 18 Jun 2019, 18:18

Seiche wrote:How do you infer component values from an xray or gooped board? I assume you degooped it, or maybe took it apart and measured it?

The X-ray was a first pass at mapping out the circuit topology to see if it was even worth the effort to degoop. If it turned out to be a clone of something already known, or close (Cornish described it as original - but you know how that can go) then we might not have gone through the trouble to tear it apart further. But, it was indeed original so we persevered!

FeVeR2112 · Post by **FeVeR2112** » 19 Jun 2019, 02:27

What Cornish pedal model is this of?

gght · Post by **gght** » 19 Jun 2019, 17:59

OC-1?

FeVeR2112 · Post by **FeVeR2112** » 19 Jun 2019, 18:31

As it is a "new and original design".... I google searched the Cornish site and found these models that claim to be original:

BD-1
CC-1
OC-1
3Q-1

hmmmm.... which could this be then? oh... the suspense.

Seiche · Post by **Seiche** » 19 Jun 2019, 18:46

From the website:

BD-1 - Bass Driver
CC-1 - Crunch Pedal
OC-1 - Optical Compressor
3Q-1 - Active EQ with Linear Boost

What sounds most likely? The x-ray doesn't look like an optical compressor tbh, I don't see an optocoupler.

trixdropd · Post by **trixdropd** » 20 Jun 2019, 22:41

That pcb trace design under the ic though lol

Seiche · Post by **Seiche** » 21 Jun 2019, 04:50

trixdropd wrote:That pcb trace design under the ic though lol

Yeah what is that? Or is that inside the IC?

plush · Post by **plush** » 21 Jun 2019, 07:02

trixdropd wrote:That pcb trace design under the ic though lol

It's not the pcb, it's the insides of the IC.

johnk · Post by **johnk** » 13 Jul 2019, 18:16

no schematic yet?

aionios · Post by **aionios** » 14 Jul 2019, 20:39

johnk wrote:no schematic yet?

Not yet, but soon. I'm doing up a PCB for it and will pull back the curtain on everything at once :)

palelight · Post by **palelight** » 26 Aug 2019, 02:21

Any update on this project? Eagerly awaiting.

Seiche · Post by **Seiche** » 26 Aug 2019, 18:34

aionios wrote:will be released in about 2 months, so you won't have to wait long

aionios · Post by **aionios** » 26 Aug 2019, 21:39

Still on track, probably early October the way things are looking.

palelight · Post by **palelight** » 28 Aug 2019, 21:53

aionios wrote:Still on track, probably early October the way things are looking.

Thanks! Looking forward to it.

johnk · Post by **johnk** » 19 Oct 2019, 05:56

nothing yet?

aionios · Post by **aionios** » 23 Oct 2019, 21:02

johnk wrote:nothing yet?

I don't mean to tease, the layout's just extremely tight and it's been kicking me in the pants the past month or so. I finally was able to hunker down and finish it though. An appetizer...

Now shooting for the end of November for this, assuming prototyping goes well.

aionios · Post by **aionios** » 23 Oct 2019, 21:57

...And yes, there is an opto-isolator

It was installed vertically on the PCB so it didn’t show up very clearly in the X-ray.

That probably narrows it down a bit!