Enclosure not stated
Wobble BoxThe Accidental Chorus/Vibrato
- Category
- Vibrato / Chorus
- Price
- see vendor
From the vendor
Alright, you say, why is this the accidental chorus/vibrato? Well, I didn't set out to make this pedal at any point. In fact, I was playing with the ES56033 chip to try to understand its mechanism for time adjustment a little better to see if it could be used in the development of a flanger. In order to do that, I was trying to find a way to modulate the delay time using an LFO. I found out experimentally that I can get some modulation with a set delay time, but I couldn't find a way to actually change the delay time in a way similar to how a PT2399 can be done.
My thinking is that the ES56033, because it has the F_adj pins, probably has some sort of internal compensation, making techniques like an LFO on one pin, or a current sink somewhere ineffectual. I still don't understand exactly what is happening, but I do know that this chip won't work for a flanger. That being said, that d
Schematic
The schematic is in the vendor's build document, page 1. Open the build document. No KiCad fragment has been drawn for this circuit yet.
Parts list 44 rows
Report a wrong parseGot parts in a drawer? See what you can build with them.
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 16 | ||||
| ×1 | 68R | 68 | Resistor | shopping list |
| ×1 | 120R | 120 | Resistor | shopping list |
| ×1 | 1k | 1k | Resistor | shopping list |
| ×1 | 1k8 | 1.8k | Resistor | shopping list |
| ×2 | 4k7 | 4.7k | Resistor | shopping list |
| ×4 | 10k | 10k | Resistor | shopping list |
| ×3 | 12k | 12k | Resistor | shopping list |
| ×3 | 15k | 15k | Resistor | shopping list |
| ×2 | 22k | 22k | Resistor | shopping list |
| ×1 | 33k | 33k | Resistor | shopping list |
| ×2 | 100k | 100k | Resistor | shopping list |
| ×1 | 120k | 120k | Resistor | shopping list |
| ×1 | 180k | 180k | Resistor | shopping list |
| ×4 | 220k | 220k | Resistor | shopping list |
| ×1 | 330k | 330k | Resistor | shopping list |
| ×1 | 1M | 1M | Resistor | shopping list |
| Capacitors 14 | ||||
| ×1 | 47pF | 47p | Capacitor | shopping list |
| ×1 | 100pF | 100p | Capacitor | shopping list |
| ×1 | 220pF | 220p | Capacitor | shopping list |
| ×2 | 1nF | 1n | Capacitor | shopping list |
| ×4 | 4.7nF | 4.7n | Capacitor | shopping list |
| ×1 | 10nF | 10n | Capacitor | shopping list |
| ×2 | 47nF | 47n | Capacitor | shopping list |
| ×4 | 100nF | 100n | Capacitor | shopping list |
| ×1 | 1uF | 1u | Ceramic/Film Capacitor | shopping list |
| ×2 | 1uF | 1u | Electrolytic Capacitor | shopping list |
| ×1 | 4.7uF | 4.7u | Electrolytic Capacitor | shopping list |
| ×1 | 22uF | 22u | Electrolytic Capacitor | shopping list |
| ×2 | 47uF | 47u | Electrolytic Capacitor | shopping list |
| ×2 | 100uF | 100u | Electrolytic Capacitor | shopping list |
| Diodes 1 | ||||
| ×1 | 1N4148 | 1N4148 | shopping list | |
| Transistors 1 | ||||
| ×1 | BC548 | BC548 | shopping list | |
| ICs 2 | ||||
| ×1 | LM7805 | LM7805 | shopping list | |
| ×3 | TL072 | TL072 | shopping list | |
| Potentiometers 3 | ||||
| ×1 | A1k | A1k | Potentiometer | shopping list |
| ×1 | B50k | B50k | Potentiometer | shopping list |
| ×1 | C100k | C100k | Potentiometer | shopping list |
| Trimmers 1 | ||||
| ×1 | 10k | 10k | Trimmer | shopping list |
| Switches 1 | ||||
| ×1 | 3PDT | 3PDT | footswitch | shopping list |
| LEDs 1 | ||||
| ×1 | LED | LED | shopping list | |
| Jacks & sockets 2 | ||||
| ×2 | 1/4” | 1/4” | input jack | shopping list |
| ×1 | DC | DC | power jack | shopping list |
| Other 2 | ||||
| ×1 | ES56033E | ES56033E | shopping list | |
| ×1 | Enclosure | ENCLOSURE | shopping list | |