Enclosure not stated · 4 knobs
Boss CS-3 Compressor / Madbean OracleVerified
Based on the Boss CS-3 Compressor / Madbean Oracle
- Category
- Compressor
- Build
- Vero· 22×30· 44 cuts, 31 links
- Layout
- Verified · Dirtbox Layouts marks it as built and working
- Tags
- Boss, Chris Stelloh, Compressor, Madbean
From the post
Another great contribution by Chris Stelloh! This is a layout drawn from the Madbean Oracle project, which is, essentially the Boss CS-3 compression sustainer. I really like the sound of VCA-driven compressors, especially on sampled drum sounds. This Boss pedal has been around for about 40 years, and the Madbean version makes a few slight modifications to it based on stuff people have done attempting to improve the sound quality and lower the noise. I included a list of part values that are most commonly swapped to make this more bass guitar friendly. This one is verified and good to go.
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 39 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 13 | ||||
| ×8 | 10k | 10k | read from the layout by eye | |
| ×5 | 1M | 1M | printed 1m; read from the layout by eye | |
| ×2 | 4k7 | 4.7k | read from the layout by eye | |
| ×2 | 22k | 22k | read from the layout by eye | |
| ×2 | 1k | 1k | read from the layout by eye | |
| ×1 | 47Ω | 47 | read from the layout by eye | |
| ×1 | 15k | 15k | read from the layout by eye | |
| ×1 | 2k7 | 2.7k | read from the layout by eye | |
| ×3 | 100k | 100k | read from the layout by eye | |
| ×2 | 47k | 47k | read from the layout by eye | |
| R10 | 10k | 10k | stock; MORE BASS: 470R; read from the layout by eye | |
| R13 | 10k | 10k | stock; MORE BASS: 100R; read from the layout by eye | |
| ×1 | ? | ? | LED resistor, value not given; read from the layout by eye | |
| Capacitors 12 | ||||
| ×1 | 1n8 | 1.8n | read from the layout by eye | |
| ×2 | 10nF | 10n | read from the layout by eye | |
| ×1 | 47nF | 47n | read from the layout by eye | |
| ×4 | 100nF | 100n | read from the layout by eye | |
| ×2 | 1uF | 1u | film box; read from the layout by eye | |
| ×1 | 1uF | 1u | electrolytic; read from the layout by eye | |
| ×1 | 4u7 | 4.7u | electrolytic; read from the layout by eye | |
| ×1 | 47uF | 47u | electrolytic; read from the layout by eye | |
| ×1 | 100uF | 100u | electrolytic; read from the layout by eye | |
| C1 | 22nF | 22n | stock; MORE BASS: 470nF; read from the layout by eye | |
| C4 | 27nF | 27n | stock; MORE BASS: 220-470nF; read from the layout by eye | |
| C5 | 47nF | 47n | stock; MORE BASS: 2u2 (non-polarized); read from the layout by eye | |
| Diodes 2 | ||||
| ×5 | 1N4148 | 1N4148 | D1-D5; read from the layout by eye | |
| D6 | 1N5817 | 1N5817 | read from the layout by eye | |
| Transistors 4 | ||||
| Q1 | J201 | J201 | JFET; read from the layout by eye | |
| Q2 | 2N3904 | 2N3904 | read from the layout by eye | |
| Q3 | 2N3904 | 2N3904 | read from the layout by eye | |
| Q4 | 2N5088 | 2N5088 | read from the layout by eye | |
| ICs 4 | ||||
| IC1 | NE5532 | NE5532 | read from the layout by eye | |
| IC2 | THAT2181 | THAT2181 | (CoolAudio V2181); read from the layout by eye | |
| IC3 | NE5532 | NE5532 | read from the layout by eye | |
| IC4 | NJM2904 | NJM2904 | read from the layout by eye | |
| Potentiometers 4 | ||||
| Tone | B20K | B20k | Potentiometer | read from the layout by eye |
| Sustain | B20K | B20k | Potentiometer | legend: also try C20k to fine tune the release time; read from the layout by eye |
| Level | A50K | A50k | Potentiometer | read from the layout by eye |
| Attack | C250K | C250k | Potentiometer | read from the layout by eye |