Enclosure not stated · 2 knobs
Demeter TremulatorVerified
Based on the Demeter Tremulator· 3 other boards clone it
From the post
Here's a great sounding tremolo circuit from Demeter–the Tremulator. It's an optical trem, using a VTL5C1. That part can be replaced with an LED and a LDR (600Ω on/50M off) combo. Also, the diodes used in the originals are 1N5229 4.3v zenners, though you can use other zenners up to 5.1v. 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 22 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 8 | ||||
| ×7 | 100K | 100k | read from the layout by eye | |
| ×3 | 10K | 10k | read from the layout by eye | |
| ×2 | 1M | 1M | read from the layout by eye | |
| ×1 | 8.2K | 8.2k | read from the layout by eye | |
| ×1 | 33K | 33k | read from the layout by eye | |
| ×1 | 1.8K | 1.8k | read from the layout by eye | |
| ×1 | 1K | 1k | read from the layout by eye | |
| ×1 | 4.7K | 4.7k | read from the layout by eye | |
| Capacitors 4 | ||||
| ×1 | 47nF | 47n | read from the layout by eye | |
| ×1 | 1uF | 1u | box film; read from the layout by eye | |
| ×3 | 4.7uF | 4.7u | electrolytic; read from the layout by eye | |
| ×1 | 100uF | 100u | electrolytic; read from the layout by eye | |
| Diodes 3 | ||||
| ×1 | 1N4001 | 1N4001 | read from the layout by eye | |
| D1 | 4.3V Zener | 4V3 | read from the layout by eye | |
| D2 | 4.3V Zener | 4V3 | read from the layout by eye | |
| ICs 3 | ||||
| ×1 | LF442 | LF442 | read from the layout by eye | |
| ×1 | TL061 | TL061 | read from the layout by eye | |
| ×1 | LF351 | LF351 | read from the layout by eye | |
| Opto 1 | ||||
| ×1 | VTL5C1 | VTL5C1 | read from the layout by eye | |
| Potentiometers 2 | ||||
| Speed | B500K | B500k | Potentiometer | read from the layout by eye |
| Depth | B50K | B50k | Potentiometer | read from the layout by eye |
| Trimmers 1 | ||||
| ×1 | 5K | 5k | read from the layout by eye | |
Other boards based on the Demeter Tremulator
- Demeter Tremulator Dirtbox Layouts
- Demeter Tremulator Revolution Deux
- Demeter Tremulator Tagboard Effects