Akashic Guitar effects circuit lookup
DRYWETCOARSEFINEFEEDBACKDECAY

Enclosure not stated · 6 knobs

Tagboard Effects

Casper Electronics EchobenderVerified

Based on the Casper Electronics Echo Bender· 2 other boards clone it

Category
Delay
Controls
Dry · Wet · Coarse · Fine · Feedback · Decay
Build
Vero· 21×20· 30 cuts, 8 links
Layout
Verified · Tagboard Effects marks it as built and working
Tags
Delay, Noise, Reverb

From the post

Something weird to do with your extra PT2399s. From Casper Electronics :

The Echo Bender is a mix of multi FX pedal and noise maker.

It can process external signals like guitars, keyboards, mics and drum machines or it can create complex sounds on its own.

It can function in several different stand alone modes:

-Warm analog sounding echo.

-Highly adjustable distortion.

-Ring mod style feedback.

-Complex noise generator.

-These modes can be used on their own or it can all be mixed together to achieve effects ranging from melodic and dreamy to chaotic and screamy.

The noise generating capabilities are especially interesting. The echo rate range has been set much lower than the standard echo pedal. When the rate is turned WAY down, the sound breaks up into blipping squeals and screeches. Combine this with distortion and feedback tones and a reverse decay setting and you’ve got a lot of variety and tonal complexity.

Video demos and additional information on the Casper Electronics site.

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 30 rows

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Check before you build · 2 values the reader of this layout was not sure of
  • 5pF ceramic left of IC2, top row: printed clearly, unusual value
  • 100uF can right of the 10K between IC2 and IC1: its leading digit is overlapped by the 2.7nF below, read as 100uF
RefValueNormalizedTypeNotes
Resistors 9
×21M1Mread from the layout by eye
×1510K510kread from the layout by eye
×1330K330kread from the layout by eye
×215K15kread from the layout by eye
×112K12kread from the layout by eye
×910K10kread from the layout by eye
×14.7K4.7kread from the layout by eye
×21K1kread from the layout by eye
×1100Ω100read from the layout by eye
Capacitors 11
×15pF5pread from the layout by eye
×1100pF100pread from the layout by eye
×22.7nF2.7nread from the layout by eye
×210nF10nread from the layout by eye
×127nF27nread from the layout by eye
×382nF82nread from the layout by eye
×3100nF100nread from the layout by eye
×61uF1uelectrolytic; read from the layout by eye
×14.7uF4.7uelectrolytic; read from the layout by eye
×247uF47uelectrolytic; read from the layout by eye
×2100uF100uelectrolytic; read from the layout by eye
Diodes 1
D11N58171N5817read from the layout by eye
ICs 3
IC1PT2399PT2399read from the layout by eye
IC2TL072TL072read from the layout by eye
×178057805Regulator is 7805 or 78L05; drawn as a TO-92; read from the layout by eye
Potentiometers 6
DryB100KB100kPotentiometerread from the layout by eye
WetB100KB100kPotentiometerread from the layout by eye
CoarseB500KB500kPotentiometerread from the layout by eye
FineB10KB10kPotentiometerread from the layout by eye
FeedbackB5KB5kPotentiometerread from the layout by eye
DecayB100KB100kPotentiometerread from the layout by eye

Other boards based on the Casper Electronics Echo Bender