Akashic Guitar effects circuit lookup
RATEINTENSITYLEVELTHROBVOICE

125B · 5 knobs

Tagboard Effects

Earthquaker Devices The DepthsVerified

Based on the EarthQuaker Devices The Depths· 9 other boards clone it

Controls
Rate · Intensity · Level · Throb · Voice
Difficulty
Difficult
Build
Vero· 21×21· 40 cuts, 24 links
Layout
Verified · Tagboard Effects marks it as built and working
Tags
EarthQuaker Devices, Vibrato

From the post

Direct from the source:

Ahoy! Welcome to your new Depths Optical Vibe Machine! The Depths is our take on the classic optical vibe circuit. Now you can swab the decks with the same lush, pulsating, three-dimensional swirling sound you know and love, with some modern accouterments for all you land-lubbers out there.

The Depths is optimized for use with all kinds of instruments, pickups, and to play well with dirt, so nobody’s left waiting on shore. If it’s got a ¼” output, plug it in and get deep!

In addition to the classic vibe controls, the Depths features unique controls for “Voice” and “Throb.” The “Voice” control adjusts the midrange focus of the Depths, which is perfect for tailoring the effect to your particular instrument. Clockwise, you’ll hear a fuller sound with a low-end focus. Counter-clockwise, you’ll hear a thinner, spikier sound with a forward upper-midrange bite. The “Throb” knob adds a hefty subharmonic low-end pulse to the vibrato signal, which is especially useful on synthesizers and the bass guitar. It sounds great with a little bit of dirt on the neck pickup of a guitar, too! This works best with the “Voice” turned counter-clockwise for a warmer tone.

The Depths’ “Intensity” and “Rate” controls are dialed in to give you the classic optical vibe sound at more modest settings, but dive in deeper and you’ll find anything from a smooth ultra-slow warble to sharp, speedy bursts! Also, the “Level” control has tons of output above unity on tap to combat the perceived volume loss of most vibe pedals, so your tone is always above water. And, if 9v isn’t enough to keep you afloat, the Depths may be powered at 18v for a stiffer tone with more headroom and sparkle.

We've got 2 layouts for you.

Layout 1: We've got the the LFO off the main board to hopefully prevent the dreaded LFO tick. Should fit in a 125b like the original. Downside is that there is more offboard wiring you will need to do.

Layout 2: Slightly larger board, with the LFO on the main board. You shouldn't get any ticking, and you'll save on having to deal with the extra offboard wiring.

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 32 rows

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RefValueNormalizedTypeNotes
Resistors 12
×847K47kread from the layout by eye
×3100K100kread from the layout by eye
×310K10kread from the layout by eye
×21M1Mread from the layout by eye
×2220K220kread from the layout by eye
×23K33.3kread from the layout by eye
×156K56kread from the layout by eye
×122K22kread from the layout by eye
×115K15kread from the layout by eye
×12M22.2Mread from the layout by eye
×14K74.7kread from the layout by eye
×1100R100read from the layout by eye
Capacitors 10
×1100n100nread from the layout by eye
×115n15nread from the layout by eye
×1220n220nread from the layout by eye
×14n74.7nread from the layout by eye
×1100p100pread from the layout by eye
×1470p470pread from the layout by eye
×51u1uelectrolytic; read from the layout by eye
×110u10uelectrolytic; read from the layout by eye
×247u47uelectrolytic; read from the layout by eye
×1100u100uelectrolytic; read from the layout by eye
Diodes 1
D21N58171N5817read from the layout by eye
Transistors 1
×2MPSA18MPSA18read from the layout by eye
ICs 1
×3TL072TL072read from the layout by eye
Opto 1
×4LDRLDRon the LDR board; legend: LDRs: Test; read from the layout by eye
Potentiometers 5
RateB100KB100kPotentiometerdual; read from the layout by eye
IntensityB25KB25kPotentiometerread from the layout by eye
LevelA100KA100kPotentiometerread from the layout by eye
ThrobB25KB25kPotentiometerread from the layout by eye
VoiceB10KB10kPotentiometerread from the layout by eye
LEDs 1
D15mm Transp. LED5MM TRANSP. LEDon the LDR board; legend adds (Test); read from the layout by eye

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