Akashic Guitar effects circuit lookup
GAINTONEVOLUME

Enclosure not stated · 3 knobs

Tagboard Effects

Fulltone OCD - All versionsVerified

Based on the Fulltone OCD· 12 other boards clone it

Category
Overdrive
Controls
Gain · Tone · Volume
Build
Vero· 19×11· 14 cuts, 5 links
Layout
Verified · Tagboard Effects marks it as built and working
Tags
Fulltone, Overdrive

From the post

The OCD V4 for me is my most underwhelming and disappointing pedal. It was hyped up to the max and so I was expecting drive Utopia, but instead I got a thin, brittle sounding effect that seemed to suck all the meat out of my signal. I'm sure the pedal reacts differently with different guitar and amp combinations, but I can safely say that for me, with a Gibson Les Paul, Marshall 6101 or Engl Thunder it sounded pants.

So I sold it thinking that I would have preferred one of the earlier versions that had a bit more girth. So if you too want one of the previous versions, I think this pretty much covers what the changes were. If you have any further info about differences I may have missed or other changes that may have happened, then please let me know and I'll add the different variations.

Revised layouts - March 2014

I have redone all the layouts because I could see they could be made slightly smaller, require only a single ground connection and make better use of the space.

V1

V2

V3

V4 (meh!)

Schematic

This is a board layout, a drawing of where each part goes, and the post may link the schematic it was drawn from. Open the layout at Tagboard Effects. No KiCad fragment has been drawn for this circuit yet.

Parts list 23 rows

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RefValueNormalizedTypeNotes
Resistors 10
×510K10kread from the layout by eye
×12K22.2kread from the layout by eye
×118K18kread from the layout by eye
×1470K470kread from the layout by eye
×11M1Mread from the layout by eye
×1150K150kread from the layout by eye
×1100R100read from the layout by eye
×133K33kread from the layout by eye
×122K22kread from the layout by eye
×139K39kread from the layout by eye
Capacitors 6
×2220p220pread from the layout by eye
×11n1nread from the layout by eye
×122n22nread from the layout by eye
×168n68nread from the layout by eye
×3100n100nread from the layout by eye
×310u10uelectrolytic; read from the layout by eye
Transistors 2
Q12N70002N7000MOSFET; read from the layout by eye
Q22N70002N7000MOSFET; read from the layout by eye
ICs 1
ICTL082TL082read from the layout by eye
Potentiometers 3
GainA500KA500kPotentiometerread from the layout by eye
ToneB25KB25kPotentiometerread from the layout by eye
VolumeB100KB100kPotentiometerread from the layout by eye
Switches 1
Sw1SPSTSPSTtoggle; read from the layout by eye

Other boards based on the Fulltone OCD