Enclosure not stated · 6 knobs
EarthQuaker Devices Bit CommanderVerified
Based on the EarthQuaker Devices Bit Commander· 7 other boards clone it
- Category
- Octave / Pitch
- Build
- Perfboard
- Layout
- Verified · Effects Layouts (blog) marks it as built and working
- Tags
- Earthquaker Devices, Octave, Synth
From the post
The Bit Commander is an synth/octave effect that's all analog. It creates square wave synth tones across 4 octaves (2 up, 2 down) and it's capable of creating a wide range of sounds. The octave down effect is generated from the ICs, while the octave up comes from the 4024 and transformer (kind of like an Octavia). From EQD:
Like all analog octave effects, there are some basic rules to follow that will get you the most enjoyment from your Bit Commander. Use the neck pickup and play single notes. The best tracking occurs from the 7th fret up on all the strings. Below the 7th will still track but there will be occasional glitches and stutters. The lower the note, the harder it is for the Bit Commander to register. The use of Bass and lower registers on keyboards will yield unexpected, sometimes pleasing, sometimes disgusting results. These are not mistakes or flaws, it is the nature of analog octaves.
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 7 | ||||
| ×1 | 1M | 1M | read from the layout by eye | |
| ×4 | 10K | 10k | read from the layout by eye | |
| ×3 | 220K | 220k | read from the layout by eye | |
| ×2 | 100K | 100k | read from the layout by eye | |
| ×1 | 47K | 47k | read from the layout by eye | |
| ×1 | 22K | 22k | read from the layout by eye | |
| ×1 | 4.7K | 4.7k | read from the layout by eye | |
| Capacitors 6 | ||||
| ×2 | 10uF | 10u | electrolytic; read from the layout by eye | |
| ×8 | 1uF | 1u | electrolytic; read from the layout by eye | |
| ×2 | 100uF | 100u | electrolytic; read from the layout by eye | |
| ×1 | 10nF | 10n | read from the layout by eye | |
| ×2 | 22nF | 22n | read from the layout by eye | |
| ×1 | 1nF | 1n | read from the layout by eye | |
| Diodes 2 | ||||
| ×1 | 1N4001 | 1N4001 | read from the layout by eye | |
| ×2 | 1N4148 | 1N4148 | read from the layout by eye | |
| ICs 3 | ||||
| ×1 | JRC386D | JRC386D | read from the layout by eye | |
| ×1 | TL072 | TL072 | read from the layout by eye | |
| ×1 | CD4024BE | CD4024BE | read from the layout by eye | |
| Transformers 1 | ||||
| ×1 | TM011-R | TM011-R | transformer, pads 1-Primary-3 / 4-Secondary-5; read from the layout by eye | |
| Potentiometers 6 | ||||
| Sub | B100K | B100k | Potentiometer | read from the layout by eye |
| Base | B100K | B100k | Potentiometer | read from the layout by eye |
| Up One | B2K | B2k | Potentiometer | read from the layout by eye |
| Down One | B100K | B100k | Potentiometer | read from the layout by eye |
| Filter | B5K | B5k | Potentiometer | read from the layout by eye |
| Level | A100K | A100k | Potentiometer | wire pads labelled Volume; read from the layout by eye |
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