Enclosure not stated · 2 knobs
Harmonic Percolator
Based on the Interfax Harmonic Percolator· 22 other boards clone it
From the vendor
Harmonic Percolator with a transistor selector toggle switch.
Schematic
The schematic is in the vendor's build document. Open the build document. No KiCad fragment has been drawn for this circuit yet.
Parts list 19 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 9 | ||||
| R1 | 1K | 1k | ||
| R2 | 1K | 1k | ||
| R3 | 56K | 56k | ||
| R4 | 91K | 91k | ||
| R5 | 2M2 | 2.2M | ||
| R6 | 91K | 91k | ||
| R7 | 33R | 33 | ||
| R8 | 1M | 1M | ||
| CLR | 4K7 | 4.7k | Increase for less led brightness | |
| Capacitors 7 | ||||
| C1 | 100PF | 100p | ||
| C2 | 47NF | 47n | ||
| C3 | 1.5NF | 1.5n | ||
| C4 | 47UF | 47u | ||
| C5 | 100NF | 100n | ||
| C6 | 100NF | 100n | ||
| C7 | 100UF | 100u | ||
| Transistors 1 | ||||
| Q1 | 2N3906 | 2N3906 | Try other pnp transistors here but watch the pinout | |
| Potentiometers 2 | ||||
| Harmonics | A100K | A100k | Potentiometer | |
| Balance | A50K | A50k | Potentiometer | |
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