Enclosure not stated · 8 knobs
Dunwich Amplification Bass Overdrive (DIY)
Based on the Dunwich Amplification Bass Overdrive (DIY)
From the post
Based on Boss ODB-3 but with lots of added controls and switches! Schematic and BOM at OSH Park.
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 Dirtbox Layouts. No KiCad fragment has been drawn for this circuit yet.
Parts list 54 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 15 | ||||
| ×6 | 4.7K | 4.7k | read from the layout by eye | |
| ×5 | 10K | 10k | read from the layout by eye | |
| ×4 | 2.2K | 2.2k | read from the layout by eye | |
| ×2 | 100K | 100k | read from the layout by eye | |
| ×2 | 1M | 1M | read from the layout by eye | |
| ×2 | 3.3K | 3.3k | read from the layout by eye | |
| ×1 | 10M | 10M | read from the layout by eye | |
| ×1 | 68K | 68k | read from the layout by eye | |
| ×1 | 47K | 47k | 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 | 1.5K | 1.5k | read from the layout by eye | |
| ×1 | 820Ω | 820 | read from the layout by eye | |
| ×1 | 470Ω | 470 | read from the layout by eye | |
| ×1 | 100Ω | 100 | read from the layout by eye | |
| Capacitors 18 | ||||
| ×1 | 10pF | 10p | read from the layout by eye | |
| ×1 | 100pF | 100p | read from the layout by eye | |
| ×2 | 1nF | 1n | read from the layout by eye | |
| ×1 | 4.7nF | 4.7n | read from the layout by eye | |
| ×1 | 6.8nF | 6.8n | read from the layout by eye | |
| ×2 | 10nF | 10n | read from the layout by eye | |
| ×2 | 15nF | 15n | read from the layout by eye | |
| ×2 | 22nF | 22n | read from the layout by eye | |
| ×2 | 33nF | 33n | read from the layout by eye | |
| ×1 | 47nF | 47n | read from the layout by eye | |
| ×1 | 68nF | 68n | read from the layout by eye | |
| ×2 | 100nF | 100n | read from the layout by eye | |
| ×1 | 150nF | 150n | read from the layout by eye | |
| ×1 | 220nF | 220n | read from the layout by eye | |
| ×2 | 1uF | 1u | film; read from the layout by eye | |
| ×1 | 2.2uF | 2.2u | film; read from the layout by eye | |
| ×1 | 10uF | 10u | electrolytic; read from the layout by eye | |
| ×2 | 100uF | 100u | electrolytic; read from the layout by eye | |
| Diodes 2 | ||||
| ×2 | 1N914 | 1N914 | D1, D2; legend: 1N914/1N4148; read from the layout by eye | |
| D5 | 1N5817 | 1N5817 | read from the layout by eye | |
| Transistors 6 | ||||
| Q1 | 2N5457 | 2N5457 | JFET; read from the layout by eye | |
| Q2 | 2N5457 | 2N5457 | JFET; read from the layout by eye | |
| Q3 | 2N3906 | 2N3906 | read from the layout by eye | |
| Q4 | 2N5457 | 2N5457 | JFET; read from the layout by eye | |
| Q5 | 2N5457 | 2N5457 | JFET; read from the layout by eye | |
| Q6 | 2N3906 | 2N3906 | read from the layout by eye | |
| ICs 1 | ||||
| ×3 | TL072 | TL072 | IC1-IC3; read from the layout by eye | |
| Potentiometers 8 | ||||
| OD Gain | A250K | A250k | Potentiometer | read from the layout by eye |
| Clean Gain | A250K | A250k | Potentiometer | read from the layout by eye |
| High | B50K | B50k | Potentiometer | read from the layout by eye |
| Low | B50K | B50k | Potentiometer | read from the layout by eye |
| Mids | B50K | B50k | Potentiometer | read from the layout by eye |
| Blend | B1M | B1M | Potentiometer | read from the layout by eye |
| Filter | A100K | A100k | Potentiometer | read from the layout by eye |
| Volume | A100K | A100k | Potentiometer | read from the layout by eye |
| Switches 3 | ||||
| Clip | SPDT on/on | SPDT ON/ON | read from the layout by eye | |
| "Bypass" | SPST | SPST | read from the layout by eye | |
| Mids | DPDT on/off/on | DPDT ON/OFF/ON | read from the layout by eye | |
| LEDs 1 | ||||
| ×2 | 3mm red LED | 3MM RED LED | D3, D4; read from the layout by eye | |