This project aims to create a DIY friendly and Mod-able version of the iconic Boss DS-1 and Big Muff Pi.
Modern guitar pedals such as the DS-1 and Big Muff Pi are super expensive!! and the new pedals that are being produced all have SMD components which make it harder to mod and repair. I always wanted to get a DS-1 but its price tag really put me off, so I did a bit of research and found a really good circuit analysis of the DS-1 on ElectroSmash's Website and decided to create my own DS-1 and it was really rewarding project and the results were also very good. Since my DS-1 Version 1 had really good results, I decided to design an even upgraded version of it which fixes problems in version 1, In addition to that I also created a PCB for the Big Muff Pi..
bnigmuff.mp4
bigger.muff.mp4
DS-1 PCB
Big Muff PCB
More detailed BOM with parts lists is under the src folder
| Reference | Value / Part Number |
|---|---|
| C1, C3 | 47n |
| C2, C8, C9 | 0.47µF |
| C4 | 250pF |
| C5 | 68n |
| C7 | 100pF |
| C10 | 0.01µF |
| C11 | 0.022µF |
| C12 | 0.1µF |
| C13 | 0.047µF |
| C14 | 1µF |
| C15 | 47µF |
| C23 | 100µF |
| D1 | 1N4004 |
| D4, D5, D8 | D1N4148 |
| Q1, Q2, Q3 | 2SC2240 |
| R1, R22 | 1K |
| R2, R7 | 470K |
| R3, R8, R18, R21, R24, R25 | 10K |
| R4, R5, R10, R11, R23 | 100K |
| R9 | 22Ω |
| R13 | 4.7K |
| R14, R15 | 2.2K |
| R16, R17 | 6.8K |
| R19, R20 | 1M |
| R39 | 47K |
| U1 | NJM3404A (M5223AL, BA728N equiv.) |
| VR1, VR2 | 100KB |
| VR3 | 20KB |
| J1, J2 | 6.35mm Jacks |
| Component Type | Value / Part Number | Designators |
|---|---|---|
| NPN Transistors | BC239 or 2N5088, 2N5089, BC549C, SE4010, 2N5210 | Q1, Q2, Q3, Q4 |
| Silicon Diodes | 1N914 or 1N4148 | D1, D2, D3, D4 |
| Potentiometers (Lin) | 100K | Sustain, Tone, Volume |
| Resistors | 10K | R13, R19, R18, R11, R12 |
| Resistors | 100K | R20, R16, R3 |
| Resistors | 470K | R9, R17, R15 |
| Resistors | 39K | R2, R8 |
| Resistors | 150 | R21, R10 |
| Resistors | 15K | R6 |
| Resistor | 47K | R14 |
| Resistor | 100 | R22 |
| Resistor | 3.3K | R4 |
| Resistor | 1K | R23 |
| Resistor | 22K | R5 |
| Capacitors | 1µF | C1, C4, C6, C7 |
| Capacitors | 100nF | C5, C13, C3, C2 |
| Capacitors | 470pF | C10, C11, C12 |
| Capacitor | 4nF | C9 |
| Capacitor | 10nF | C8 |
ElectroSmash Boss DS-1 Analysis ElectroSmash Big Muff Pi Analysis
