Akashic Guitar effects circuit lookup
SUBBASEUP ONEDOWN ONEFILTERLEVEL

Enclosure not stated · 6 knobs

Effects Layouts (blog)

EarthQuaker Devices Bit CommanderVerified

Based on the EarthQuaker Devices Bit Commander· 7 other boards clone it

Controls
Sub · Base · Up One · Down One · Filter · Level
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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RefValueNormalizedTypeNotes
Resistors 7
×11M1Mread from the layout by eye
×410K10kread from the layout by eye
×3220K220kread from the layout by eye
×2100K100kread from the layout by eye
×147K47kread from the layout by eye
×122K22kread from the layout by eye
×14.7K4.7kread from the layout by eye
Capacitors 6
×210uF10uelectrolytic; read from the layout by eye
×81uF1uelectrolytic; read from the layout by eye
×2100uF100uelectrolytic; read from the layout by eye
×110nF10nread from the layout by eye
×222nF22nread from the layout by eye
×11nF1nread from the layout by eye
Diodes 2
×11N40011N4001read from the layout by eye
×21N41481N4148read from the layout by eye
ICs 3
×1JRC386DJRC386Dread from the layout by eye
×1TL072TL072read from the layout by eye
×1CD4024BECD4024BEread from the layout by eye
Transformers 1
×1TM011-RTM011-Rtransformer, pads 1-Primary-3 / 4-Secondary-5; read from the layout by eye
Potentiometers 6
SubB100KB100kPotentiometerread from the layout by eye
BaseB100KB100kPotentiometerread from the layout by eye
Up OneB2KB2kPotentiometerread from the layout by eye
Down OneB100KB100kPotentiometerread from the layout by eye
FilterB5KB5kPotentiometerread from the layout by eye
LevelA100KA100kPotentiometerwire pads labelled Volume; read from the layout by eye

Other boards based on the EarthQuaker Devices Bit Commander