Catalinbread Pareidolia Harmonic Mesmerizer  [traced]

General documentation, gut shot, schematic links, ongoing circuit tracing, deep thoughts ... all about boutique stompboxes.

Re: Catalinbread Pareidolia Harmonic Mesmerizer

Postby culturejam » 16 Dec 2011, 20:37

Interesting:

http://electroschematics.com/6191/tremo ... t-circuit/

The 2206 datasheet says it needs at least 10v to operate in single-supply setup.
User avatar
culturejam
Old Solderhand
 
Posts: 4263
Joined: 24 Feb 2008, 06:59
Has thanked: 462 times
Have thanks: 580 times

Re: Catalinbread Pareidolia Harmonic Mesmerizer

Postby roseblood11 » 16 Dec 2011, 20:46

KindaFuzzy wrote:
mrkaploca wrote:Cool! But could this be 7805 regulator(it is not so visible on the image,or it is sanded out ? ).


Nope, it says 78m09b for sure, I haven't looked at that section at all to see how it works with a battery though.



It's just used as a overvoltage protection, I guess.
roseblood11
Tube Twister
 
Posts: 1803
Joined: 23 Aug 2008, 15:21
Has thanked: 347 times
Have thanks: 309 times

Re: Catalinbread Pareidolia Harmonic Mesmerizer

Postby KindaFuzzy » 16 Dec 2011, 20:48

coldcraft wrote:2206D (as in XR-2206D) is a function generator. That's most likely their LFO


I agree, I just some in the mail yesterday for when I test the schematic.
User avatar
KindaFuzzy
Degoop Doctor
 
Posts: 646
Joined: 10 Nov 2008, 15:00
Location: Canada
Has thanked: 106 times
Have thanks: 296 times

Re: Catalinbread Pareidolia Harmonic Mesmerizer

Postby culturejam » 16 Dec 2011, 20:59

User avatar
culturejam
Old Solderhand
 
Posts: 4263
Joined: 24 Feb 2008, 06:59
Has thanked: 462 times
Have thanks: 580 times

Re: Catalinbread Pareidolia Harmonic Mesmerizer

Postby KindaFuzzy » 19 Dec 2011, 21:25

Here's a little update, I started tracing it, but it was such a confusing layout that I decided to do a component trace first. Green is topside, purple is underneath. Looks like the raw DC from the battery or jack goes straight to the FETs, but has to get through the regulator to go to the two ICs. With a 9v battery that reads 9.8v out of circuit powering everything, the voltage feeding the regulator drops to 7.6v, and reads 6.1v after. With a 12v adapter, everything is as it should be, with 12v before the reg, and 9v exactly after.
You do not have the required permissions to view the files attached to this post.

For this message the author KindaFuzzy has received thanks: 2
Nocentelli (19 Dec 2011, 22:08), tp801 (20 Dec 2011, 12:39)
User avatar
KindaFuzzy
Degoop Doctor
 
Posts: 646
Joined: 10 Nov 2008, 15:00
Location: Canada
Has thanked: 106 times
Have thanks: 296 times

Re: Catalinbread Pareidolia Harmonic Mesmerizer

Postby roseblood11 » 20 Dec 2011, 05:10

Interesting. Does the 2206 work properly with 6.1V?
roseblood11
Tube Twister
 
Posts: 1803
Joined: 23 Aug 2008, 15:21
Has thanked: 347 times
Have thanks: 309 times

Re: Catalinbread Pareidolia Harmonic Mesmerizer

Postby KindaFuzzy » 20 Dec 2011, 13:38

roseblood11 wrote:Interesting. Does the 2206 work properly with 6.1V?


It was working when I first got the pedal and was testing it with a battery only, I'll double check the voltages when I get the jacks soldered back in.
User avatar
KindaFuzzy
Degoop Doctor
 
Posts: 646
Joined: 10 Nov 2008, 15:00
Location: Canada
Has thanked: 106 times
Have thanks: 296 times

Re: Catalinbread Pareidolia Harmonic Mesmerizer

Postby KindaFuzzy » 20 Dec 2011, 18:33

Here's the schematic I came up with. Still have to test it on the breadboard, but looks good so far.
You do not have the required permissions to view the files attached to this post.

For this message the author KindaFuzzy has received thanks: 14
culturejam (20 Dec 2011, 21:07), hbo (08 Jan 2012, 13:31), Intripped (22 Sep 2013, 21:19), juanro (06 Jan 2012, 13:33), modman (06 Apr 2017, 09:46), Nocentelli (20 Dec 2011, 19:57), PmCimini (16 Jan 2012, 20:37), roseblood11 (06 Jan 2012, 12:47), Stray (20 Dec 2011, 19:07), tp801 (20 Dec 2011, 19:02) and 4 more users
User avatar
KindaFuzzy
Degoop Doctor
 
Posts: 646
Joined: 10 Nov 2008, 15:00
Location: Canada
Has thanked: 106 times
Have thanks: 296 times

Re: Catalinbread Pareidolia Harmonic Mesmerizer

Postby coldcraft » 20 Dec 2011, 19:17

interesting, although I'm starting to get some ideas about how it could be improved.
Black Dynamite wrote:you need to shut the fuck up when grown folks is talkin.
User avatar
coldcraft
Diode Debunker
 
Posts: 733
Joined: 11 Jul 2009, 02:00
Has thanked: 42 times
Have thanks: 83 times

Re: Catalinbread Pareidolia Harmonic Mesmerizer

Postby roseblood11 » 20 Dec 2011, 20:17

Another imperfect pedal with a perfect sound... :wink:
roseblood11
Tube Twister
 
Posts: 1803
Joined: 23 Aug 2008, 15:21
Has thanked: 347 times
Have thanks: 309 times

Re: Catalinbread Pareidolia Harmonic Mesmerizer

Postby RnFR » 21 Dec 2011, 00:33

more mu-amps!
"You've converted me to Cubic thinking. Where do I sign up for the newsletter? I need to learn more about how I can break free from ONEism Death Math." - Soulsonic

Blog-APOCALYPSE AUDIO
User avatar
RnFR
Old Solderhand
 
Posts: 5138
Joined: 09 Jan 2008, 07:02
Location: Inner Earth
Has thanked: 150 times
Have thanks: 174 times

Re: Catalinbread Pareidolia Harmonic Mesmerizer

Postby mysticwhiskey » 21 Dec 2011, 00:44

Image

For this message the author mysticwhiskey has received thanks: 2
deadllama (07 Jan 2012, 05:29), KindaFuzzy (21 Dec 2011, 23:41)
User avatar
mysticwhiskey
Solder Soldier
 
Posts: 229
Joined: 03 Jul 2010, 10:55
Location: Adelaide, Australia
Has thanked: 49 times
Have thanks: 180 times

Re: Catalinbread Pareidolia Harmonic Mesmerizer

Postby KindaFuzzy » 21 Dec 2011, 20:53

Got the circuit working on the breadboard and sounding identical to the original, so schematic verified. Things learned:

1. This thing eats batteries, and if the voltage sags just a little, the 2206 stops oscillating or acts weird.
2. The 270p input cap makes a big difference, a 330p sounds terrible, and 220p sounds much better
3. It's really picky about the FETs, since there's no mix control between the two sides, you have to use 4 of the same type of FET to balance everything, and J201s have too much gain, while MPF102 doesn't have enough gain. I only had three 2n5485s and ended up putting a 2sk30 in the treb side and it was ok.
4. This pedal works even better without the 7809. It would probably be more reliable, and still protected from over voltage with a 9v zener or something, with a simple dropping resistor and an extra filter cap to supply the chips to keep the thumping out of the circuit.

For this message the author KindaFuzzy has received thanks: 8
culturejam (21 Dec 2011, 21:15), Intripped (22 Sep 2013, 21:21), Matt Gnarly (22 Dec 2011, 10:24), Mich P (22 Dec 2011, 09:19), mysticwhiskey (22 Dec 2011, 00:25), Nocentelli (22 Dec 2011, 08:44), roseblood11 (21 Dec 2011, 21:45), tp801 (21 Dec 2011, 22:34)
User avatar
KindaFuzzy
Degoop Doctor
 
Posts: 646
Joined: 10 Nov 2008, 15:00
Location: Canada
Has thanked: 106 times
Have thanks: 296 times

Re: Catalinbread Pareidolia Harmonic Mesmerizer

Postby Matt Gnarly » 22 Dec 2011, 10:24

Nice work Fuzzy! I've been really interested in this pedal and eventually I'll have to get around to building one.
Matt Gnarly
 
Posts: 7
Joined: 20 Oct 2011, 22:04
Has thanked: 6 times
Have thanks: 0 time

Re: Catalinbread Pareidolia Harmonic Mesmerizer

Postby coldcraft » 22 Dec 2011, 17:28

KindaFuzzy wrote:4. This pedal works even better without the 7809. It would probably be more reliable, and still protected from over voltage with a 9v zener or something, with a simple dropping resistor and an extra filter cap to supply the chips to keep the thumping out of the circuit.



the 7809 is probably there to let you run the fets at 18v. fixing the Vcc of the function gen chip most likely keeps the modulation range and depth the same regardless of 9v-18v operation. a 9v zener would dissipate quite a bit more heat when run at 18v too
Black Dynamite wrote:you need to shut the fuck up when grown folks is talkin.
User avatar
coldcraft
Diode Debunker
 
Posts: 733
Joined: 11 Jul 2009, 02:00
Has thanked: 42 times
Have thanks: 83 times

Re: Catalinbread Pareidolia Harmonic Mesmerizer

Postby coldcraft » 22 Dec 2011, 17:32

it could probably use input and output buffers.
Black Dynamite wrote:you need to shut the fuck up when grown folks is talkin.
User avatar
coldcraft
Diode Debunker
 
Posts: 733
Joined: 11 Jul 2009, 02:00
Has thanked: 42 times
Have thanks: 83 times

Re: Catalinbread Pareidolia Harmonic Mesmerizer

Postby grrrunge » 22 Dec 2011, 19:37

Perhaps there's a base here for developing a FSB-modded version of the Pareidolia. The XR-2206 is able to output squarewaves, ramps etc as shown on this excerpt from the application notes :) I'm gonna try this at some point! :D
Billede 2.png

XR2206V1.PDF
You do not have the required permissions to view the files attached to this post.
A true believer in the magic of Sherwood Forest Pedal Pirates
---
New base of operations: http://www.knucklehead.dk
User avatar
grrrunge
Diode Debunker
 
Posts: 758
Joined: 20 Mar 2010, 11:51
Location: Copenhagen, Denmark
Has thanked: 59 times
Have thanks: 207 times

Re: Catalinbread Pareidolia Harmonic Mesmerizer

Postby Jarno » 25 Dec 2011, 21:29

And, the 2206 can do some pretty weird shapes by skewing the basic shapes. Have a look at Thomas Henry's XR VCO (diy synths).
"It crackles....., but that's ok"
User avatar
Jarno
Solder Soldier
 
Posts: 202
Joined: 12 Nov 2008, 11:18
Location: Rosmalen, NL
Has thanked: 3 times
Have thanks: 4 times

Re: Catalinbread Pareidolia Harmonic Mesmerizer

Postby LaceSensor » 26 Dec 2011, 00:03

Looking forward to this, rock or FSB improved if the demos are anything to go by...
LaceSensor
Cap Cooler
 
Posts: 572
Joined: 02 Jan 2011, 13:01
Has thanked: 42 times
Have thanks: 245 times

Re: Catalinbread Pareidolia Harmonic Mesmerizer

Postby LaceSensor » 06 Jan 2012, 12:02

LaceSensor wrote:Looking forward to this, rock or FSB improved if the demos are anything to go by...


god knows what my ipad was typing there... :S

any news on a layout / trace?
LaceSensor
Cap Cooler
 
Posts: 572
Joined: 02 Jan 2011, 13:01
Has thanked: 42 times
Have thanks: 245 times

PreviousNext

Return to Boutique Stompboxes dissected...

Who is online

Users browsing this forum: reggy1 and 4 guests