Enclosure not stated · 5 knobs
Smallsound/Bigsound MiniVerified
Based on the Smallsound/Bigsound Mini· 3 other boards clone it
From the post
Here's a pretty versatile and unique overdrive from Smallsound/Bigsound. The designer, Brian, was kind enough to share his schematic over on FSB, so a big thanks to him! I've laid this out for board mounted pots and added trimmers to help bias Q1 and Q3. I posted the layout on FSB and JohnK has already verified it, so thanks John!
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 Effects Layouts (blog). No KiCad fragment has been drawn for this circuit yet.
Parts list 25 rows
Report a wrong parseGot parts in a drawer? See what you can build with them.
Check before you build · 1 value the reader of this layout was not sure of
- 5158 diode at the bottom centre near +9v: printed clearly on both the board and the wiring diagram, unusual part number (probably a 1N5817/1N5819 supply protection diode); kept as printed
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 6 | ||||
| ×6 | 1K | 1k | read from the layout by eye | |
| ×3 | 4.7K | 4.7k | 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 | 33K | 33k | read from the layout by eye | |
| ×1 | 10Ω | 10 | read from the layout by eye | |
| Capacitors 7 | ||||
| ×1 | 220nF | 220n | read from the layout by eye | |
| ×1 | 100nF | 100n | read from the layout by eye | |
| ×1 | 15nF | 15n | read from the layout by eye | |
| ×1 | 10nF | 10n | read from the layout by eye | |
| ×3 | 1uF | 1u | read from the layout by eye | |
| ×1 | 220uF | 220u | electrolytic; read from the layout by eye | |
| ×3 | 10uF | 10u | electrolytic; read from the layout by eye | |
| Diodes 1 | ||||
| ×1 | 5158 | 5158 | read from the layout by eye | |
| Transistors 4 | ||||
| Q1 | J201 | J201 | JFET; read from the layout by eye | |
| Q2 | 2N5457 | 2N5457 | JFET; read from the layout by eye | |
| Q3 | J201 | J201 | JFET; read from the layout by eye | |
| Q4 | 2N5089 | 2N5089 | read from the layout by eye | |
| Potentiometers 5 | ||||
| Bass | C500K | C500k | Potentiometer | read from the layout by eye |
| Gain | B100K | B100k | Potentiometer | dual; read from the layout by eye |
| Bias | B10K | B10k | Potentiometer | read from the layout by eye |
| Treble | B10K | B10k | Potentiometer | read from the layout by eye |
| Volume | A100K | A100k | Potentiometer | read from the layout by eye |
| Trimmers 2 | ||||
| ×2 | 50K | 50k | read from the layout by eye | |
| ×1 | 10K | 10k | read from the layout by eye | |
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