Enclosure not stated · 3 knobs
Fulltone OCD - All versionsVerified
Based on the Fulltone OCD· 12 other boards clone it
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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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 10 | ||||
| ×5 | 10K | 10k | read from the layout by eye | |
| ×1 | 2K2 | 2.2k | read from the layout by eye | |
| ×1 | 18K | 18k | read from the layout by eye | |
| ×1 | 470K | 470k | read from the layout by eye | |
| ×1 | 1M | 1M | read from the layout by eye | |
| ×1 | 150K | 150k | read from the layout by eye | |
| ×1 | 100R | 100 | read from the layout by eye | |
| ×1 | 33K | 33k | read from the layout by eye | |
| ×1 | 22K | 22k | read from the layout by eye | |
| ×1 | 39K | 39k | read from the layout by eye | |
| Capacitors 6 | ||||
| ×2 | 220p | 220p | read from the layout by eye | |
| ×1 | 1n | 1n | read from the layout by eye | |
| ×1 | 22n | 22n | read from the layout by eye | |
| ×1 | 68n | 68n | read from the layout by eye | |
| ×3 | 100n | 100n | read from the layout by eye | |
| ×3 | 10u | 10u | electrolytic; read from the layout by eye | |
| Transistors 2 | ||||
| Q1 | 2N7000 | 2N7000 | MOSFET; read from the layout by eye | |
| Q2 | 2N7000 | 2N7000 | MOSFET; read from the layout by eye | |
| ICs 1 | ||||
| IC | TL082 | TL082 | read from the layout by eye | |
| Potentiometers 3 | ||||
| Gain | A500K | A500k | Potentiometer | read from the layout by eye |
| Tone | B25K | B25k | Potentiometer | read from the layout by eye |
| Volume | B100K | B100k | Potentiometer | read from the layout by eye |
| Switches 1 | ||||
| Sw1 | SPST | SPST | toggle; read from the layout by eye | |
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