Enclosure not stated · 3 knobs
EarthQuaker Devices HummingbirdVerified
Based on the EarthQuaker Devices Hummingbird· 4 other boards clone it
From the post
It's a modded Vox Repeat Percussion so more use for those 2N2646's you stocked up on.
Info about the original:
The Hummingbird is, at heart, a hard and choppy tremolo. What comes out is more akin to vintage synth style oscillations. It's core is based on the old Vox Repeat Percussion with several updates to reduce noise, enhance the "chop" and add more control. It can create ring mod-like octaves, slow pulses, ping pong delay-like stutters, light blipping through machine gun stutter tremolo and many more wacky sounds!
Controls: Depth- Controls amount of modulation from barely there to full signal chop. Rate- Controls the speed of the LFO Level- controls the input/output level Mode- fast/slow switch for LFO rate
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 Tagboard Effects. No KiCad fragment has been drawn for this circuit yet.
Parts list 22 rows
Report a wrong parseGot parts in a drawer? See what you can build with them.
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 9 | ||||
| ×3 | 100K | 100k | read from the layout by eye | |
| ×2 | 47K | 47k | read from the layout by eye | |
| ×2 | 22K | 22k | read from the layout by eye | |
| ×2 | 470R | 470 | read from the layout by eye | |
| ×1 | 12K | 12k | read from the layout by eye | |
| ×1 | 330K | 330k | read from the layout by eye | |
| ×1 | 27K | 27k | read from the layout by eye | |
| ×1 | 39R | 39 | read from the layout by eye | |
| ×1 | 100R | 100 | read from the layout by eye | |
| Capacitors 5 | ||||
| ×1 | 22n | 22n | read from the layout by eye | |
| ×1 | 1u | 1u | read from the layout by eye | |
| ×1 | 2u2 | 2.2u | electrolytic; read from the layout by eye | |
| ×2 | 4u7 | 4.7u | electrolytic; read from the layout by eye | |
| ×2 | 100u | 100u | electrolytic; read from the layout by eye | |
| Diodes 1 | ||||
| D1 | 1N4148 | 1N4148 | read from the layout by eye | |
| Transistors 3 | ||||
| Q1 | 2N2646 | 2N2646 | unijunction; read from the layout by eye | |
| Q2 | 2N5089 | 2N5089 | read from the layout by eye | |
| Q3 | 2N5457 | 2N5457 | JFET; read from the layout by eye | |
| Potentiometers 3 | ||||
| Level | B50K | B50k | Potentiometer | read from the layout by eye |
| Depth | B25K | B25k | Potentiometer | read from the layout by eye |
| Rate | B50K | B50k | Potentiometer | read from the layout by eye |
| Switches 1 | ||||
| Mode | SPDT on/on | SPDT ON/ON | toggle; read from the layout by eye | |
Other boards based on the EarthQuaker Devices Hummingbird
- Earthquaker Devices Hummingbird Effects Layouts (blog)
- Tremolo Device PCB Guitar Mania · 1590B · €9.90
- Hummingbird PCBWay: Glory to Ukraine
- Woodpecker Tremolo PedalPCB · 125B · $10.00