Enclosure not stated · 3 knobs
Pigtronix Fat DriveVerified
Based on the Pigtronix Fat Drive· 4 other boards clone it
From the post
Original info:
"Pigtronix FAT Drive takes a futuristic analog approach to create complex crunch tones using CMOS clipping and a variable low pass filter for tone shaping. Bringing the tone control all the way clockwise takes this filter completely out of the circuit for total transparency and robust low end. Rolling the tone control back smooths out the highs, leaving ample mid-range bloom and bottom end punch.
A Hi / Lo toggle switch brings additional versatility to the FAT Drive’s wide-ranging palette of overdrive tones, altering the gain structure for enhanced crunch and soaring leads. The FAT Drive features true bypass switching and runs fine on standard 9-volt power but ships with an 18-volt adapter for superior headroom, clarity and overall output"
Schematic available here.
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 32 rows
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Check before you build · 1 value the reader of this layout was not sure of
- 130K ×4 (two left of the 4049UB, two at the right edge): printed clearly, unusual value
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 14 | ||||
| ×4 | 130K | 130k | read from the layout by eye | |
| ×4 | 100K | 100k | read from the layout by eye | |
| ×3 | 10K | 10k | read from the layout by eye | |
| ×2 | 2M2 | 2.2M | read from the layout by eye | |
| ×2 | 1M | 1M | read from the layout by eye | |
| ×1 | 47K | 47k | read from the layout by eye | |
| ×1 | 62K | 62k | read from the layout by eye | |
| ×1 | 560K | 560k | read from the layout by eye | |
| ×1 | 680K | 680k | read from the layout by eye | |
| ×1 | 1K6 | 1.6k | read from the layout by eye | |
| ×1 | 10M | 10M | read from the layout by eye | |
| ×1 | 470R | 470 | read from the layout by eye | |
| ×1 | 150R | 150 | read from the layout by eye | |
| ×1 | ? | ? | LED resistor, value not given; read from the layout by eye | |
| Capacitors 9 | ||||
| ×2 | 100p | 100p | read from the layout by eye | |
| ×1 | 10n | 10n | read from the layout by eye | |
| ×2 | 27n | 27n | read from the layout by eye | |
| ×1 | 82n | 82n | read from the layout by eye | |
| ×2 | 100n | 100n | read from the layout by eye | |
| ×1 | 220n | 220n | read from the layout by eye | |
| ×2 | 1u | 1u | electrolytic; read from the layout by eye | |
| ×1 | 10u | 10u | electrolytic; read from the layout by eye | |
| ×1 | 100u | 100u | electrolytic; read from the layout by eye | |
| Diodes 3 | ||||
| D1 | 1N4148 | 1N4148 | read from the layout by eye | |
| D2 | 1N4148 | 1N4148 | read from the layout by eye | |
| D3 | 1N5817 | 1N5817 | read from the layout by eye | |
| ICs 2 | ||||
| ×1 | 4049UB | 4049UB | read from the layout by eye | |
| ×2 | TL072 | TL072 | read from the layout by eye | |
| Potentiometers 3 | ||||
| Volume | A100K | A100k | Potentiometer | read from the layout by eye |
| Tone | B10K | B10k | Potentiometer | read from the layout by eye |
| Gain | B1M | B1M | Potentiometer | read from the layout by eye |
| Switches 1 | ||||
| Hi/Lo | SPST | SPST | read from the layout by eye | |
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