1590B · 2 knobs
Boss SG-1 Slow GearVerified
Based on the Boss SG-1 Slow Gear· 6 other boards clone it
- Category
- Utility
- Controls
- Attack · Sensitivity
- Build
- Perfboard
- Layout
- Verified · Effects Layouts (blog) marks it as built and working
- Tags
- Boss, Utility
From the post
The Slow Gear emulates a guitarist riding the volume pot or a volume pedal, creating a swell effect. This will fit comfortably in a 1590B or 125B, though with the 1590B you'll probably want to wire the pots off board or use long-leg right angle pots mounted on the component side. Here's the schematic for reference.
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 34 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
- 470nF at L16-17 (right of the 10K trimmer): printed clearly, but drawn as a round can like the electrolytics
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 13 | ||||
| ×5 | 1M | 1M | read from the layout by eye | |
| ×3 | 100K | 100k | read from the layout by eye | |
| ×3 | 10K | 10k | read from the layout by eye | |
| ×3 | 1K | 1k | read from the layout by eye | |
| ×3 | 22K | 22k | read from the layout by eye | |
| ×2 | 470K | 470k | read from the layout by eye | |
| ×2 | 4.7K | 4.7k | read from the layout by eye | |
| ×1 | 390K | 390k | read from the layout by eye | |
| ×1 | 220K | 220k | read from the layout by eye | |
| ×1 | 47K | 47k | read from the layout by eye | |
| ×1 | 3.3K | 3.3k | read from the layout by eye | |
| ×1 | 470Ω | 470 | read from the layout by eye | |
| ×1 | 390Ω | 390 | read from the layout by eye | |
| Capacitors 8 | ||||
| ×1 | 1nF | 1n | read from the layout by eye | |
| ×1 | 3.3nF | 3.3n | read from the layout by eye | |
| ×2 | 22nF | 22n | read from the layout by eye | |
| ×2 | 47nF | 47n | read from the layout by eye | |
| ×1 | 470nF | 470n | electrolytic; read from the layout by eye | |
| ×6 | 1uF | 1u | electrolytic; read from the layout by eye | |
| ×3 | 10uF | 10u | electrolytic; read from the layout by eye | |
| ×2 | 47uF | 47u | electrolytic; read from the layout by eye | |
| Diodes 3 | ||||
| ×1 | 1N5817 | 1N5817 | read from the layout by eye | |
| ×3 | 1N4148 | 1N4148 | read from the layout by eye | |
| ×1 | 5.6v | 5V6 | zener; read from the layout by eye | |
| Transistors 6 | ||||
| Q1 | BC549 | BC549 | read from the layout by eye | |
| Q2 | 2SK30A | 2SK30A | JFET; read from the layout by eye | |
| Q3 | BC549 | BC549 | read from the layout by eye | |
| Q4 | BC549 | BC549 | read from the layout by eye | |
| Q5 | BC549 | BC549 | read from the layout by eye | |
| Q6 | BC549 | BC549 | read from the layout by eye | |
| ICs 1 | ||||
| IC1 | TL071 | TL071 | or LM741; read from the layout by eye | |
| Potentiometers 2 | ||||
| Attack | B20K | B20k | Potentiometer | read from the layout by eye |
| Sensitivity | A100K | A100k | Potentiometer | read from the layout by eye |
| Trimmers 1 | ||||
| ×1 | 10K | 10k | read from the layout by eye | |
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