Enclosure not stated · 3 knobs
Earthquaker Devices Hummingbird V2
Based on the EarthQuaker Devices Hummingbird V2· 2 other boards clone it
From the post
New Year, might make Modulation Monday a thing. We'll see. Anyway, here's the EQD Hummingbird V2. It's derived from the Vox Repeat Percussion and now updated to use the 2N6027 in place of the obsolete 2N2646. There's also a couple other improvements from the earlier version so a new layout seemed like a good idea. 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 25 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 10 | ||||
| ×1 | 100Ω | 100 | read from the layout by eye | |
| ×2 | 470Ω | 470 | read from the layout by eye | |
| ×2 | 2.2K | 2.2k | read from the layout by eye | |
| ×1 | 4.7K | 4.7k | read from the layout by eye | |
| ×1 | 12K | 12k | read from the layout by eye | |
| ×1 | 22K | 22k | read from the layout by eye | |
| ×1 | 27K | 27k | read from the layout by eye | |
| ×2 | 47K | 47k | read from the layout by eye | |
| ×1 | 220K | 220k | read from the layout by eye | |
| ×1 | 1M | 1M | read from the layout by eye | |
| Capacitors 7 | ||||
| ×1 | 220nF | 220n | read from the layout by eye | |
| ×1 | 1uF | 1u | drawn as a box film capacitor, beside the Rate pads; read from the layout by eye | |
| ×2 | 1uF | 1u | electrolytic; read from the layout by eye | |
| ×2 | 2.2uF | 2.2u | electrolytic; read from the layout by eye | |
| ×1 | 4.7uF | 4.7u | electrolytic; read from the layout by eye | |
| ×1 | 10uF | 10u | electrolytic; read from the layout by eye | |
| ×2 | 100uF | 100u | electrolytic; read from the layout by eye | |
| Diodes 1 | ||||
| ×1 | 1N5817 | 1N5817 | read from the layout by eye | |
| Transistors 3 | ||||
| Q1 | PF5102 | PF5102 | JFET; read from the layout by eye | |
| Q2 | 2N5089 | 2N5089 | read from the layout by eye | |
| Q3 | 2N6027 | 2N6027 | programmable unijunction (A/G/K); read from the layout by eye | |
| Potentiometers 3 | ||||
| Depth | B10K | B10k | Potentiometer | read from the layout by eye |
| Rate | B100K | B100k | Potentiometer | read from the layout by eye |
| Level | B100K | B100k | Potentiometer | read from the layout by eye |
| Switches 1 | ||||
| Mode | SPDT on/off/on | SPDT ON/OFF/ON | toggle; read from the layout by eye | |
Other boards based on the EarthQuaker Devices Hummingbird V2
- EarthQuaker Devices Hummingbird V2 Dirtbox Layouts
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