Enclosure not stated · 3 knobs
Boss SD1 without output bufferVerified
Based on the Boss SD-1· 9 other boards clone it
From the post
With switch to change between symmetrical and asymmetrical clipping.
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 25 rows
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Check before you build · 2 values the reader of this layout was not sure of
- Clipping diodes on the switch (D1, D2, D3 and two labelled D4): no type printed anywhere on the drawing
- Second diode labelled D4 is presumably D5 (duplicate label on the drawing)
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 6 | ||||
| ×5 | 10K | 10k | read from the layout by eye | |
| ×3 | 33K | 33k | read from the layout by eye | |
| ×2 | 4K7 | 4.7k | read from the layout by eye | |
| ×1 | 100K | 100k | read from the layout by eye | |
| ×1 | 470K | 470k | read from the layout by eye | |
| ×1 | 470R | 470 | read from the layout by eye | |
| Capacitors 8 | ||||
| ×2 | 47n | 47n | read from the layout by eye | |
| ×2 | 18n | 18n | read from the layout by eye | |
| ×1 | 27n | 27n | read from the layout by eye | |
| ×1 | 10n | 10n | read from the layout by eye | |
| ×1 | 47p | 47p | read from the layout by eye | |
| ×1 | 1u | 1u | drawn as a film cap; read from the layout by eye | |
| ×1 | 47u | 47u | electrolytic; read from the layout by eye | |
| ×1 | 100u | 100u | electrolytic; read from the layout by eye | |
| Diodes 5 | ||||
| D1 | ? | ? | value not given; on the clipping switch; read from the layout by eye | |
| D2 | ? | ? | value not given; on the clipping switch; read from the layout by eye | |
| D3 | ? | ? | value not given; on the clipping switch; read from the layout by eye | |
| D4 | ? | ? | value not given; on the clipping switch; read from the layout by eye | |
| D4 | ? | ? | value not given; on the clipping switch, second diode labelled D4 (probably D5); read from the layout by eye | |
| Transistors 1 | ||||
| Q1 | ? | ? | value not given; legend says NPN silicon; read from the layout by eye | |
| ICs 1 | ||||
| IC | JRC4558 | JRC4558 | read from the layout by eye | |
| Potentiometers 3 | ||||
| Drive | A1M | A1M | Potentiometer | read from the layout by eye |
| Tone | B22K | B22k | Potentiometer | read from the layout by eye |
| Level | A10K | A10k | Potentiometer | read from the layout by eye |
| Switches 1 | ||||
| Clipping | DPDT on/on | DPDT ON/ON | Sw1, symmetrical / asymmetrical; legend: 2 position DPDT; read from the layout by eye | |
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