Akashic Guitar effects circuit lookup
CONTROLVOLUMEGAIN

Enclosure not stated · 3 knobs

Tagboard Effects

Death By Audio Robot - moddedVerified

Based on the Death By Audio Robot· 6 other boards clone it

Category
Fuzz
Controls
Control · Volume · Gain
Build
Vero· 16×18· 26 cuts, 8 links
Layout
Verified · Tagboard Effects marks it as built and working
Tags
Death By Audio, Fuzz, Noise, Octave, Pitch, Robot, Vibrato

From the post

This was my take on the DBA Robot but with individual switching for the IC internal functions (Vibrato, Robot and any of the octave options on the fly) rather than the rotary switch used in the original. I thought it would be more versatile to be able to control them all individually rather than be stuck with the choices dictated by the original scheme, and all the sounds will be there with the correct settings of the toggles. The Gain control has also been taken external after a recommendation from albru80.

I think it's probably not really worth including both and up and down momentary switches on reflection as that only chooses the direction that you step through the octave choices. So maybe removing one of those makes more sense. I'd suggest reading through the datasheet and deciding yourself what to include.

Info about the original:

The Death by Audio Robot is the latest in a line of sonic mayhem inducing pedals from our boys in NYC. The Robot brings Death by Audio into the low-fi, bit-crushing business. This insane pedal is a lo-fi pitch transposer that produces sweet, 8-bit ring mod effects to your guitar. The Robot features four operational modes; Normal, Octave Up, Octave Down, and Arpeggiator. The Octave Up and Octave Down modes are pretty self explanatory. The Control knob, when fully clockwise, yields either octave up or down depending on the mode. When turned down, it bends the pitch of the octave down so you can dial in the exact tone you want. In Normal mode the Robot acts as a lo-fi fuzz pedal and the Control knob bends the pitch down from clockwise. The amount of fuzz can be further toyed with using the internal gain control. Now the fun part. The Death by Audio Robot also features an arpeggiator. The pitch will arpeggiate in a sequence and the Control knob will adjust the speed of the arpeggiation. It also makes a slight change in the pitch, allowing the arpeggiator to go higher. With all this fun, who needs anything else? Arpeggiation, whacky robotic nonsense, and 8-bit fuzz fun are all jam packed together in the Death by Audio Robot.

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 25 rows

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Check before you build · 3 values the reader of this layout was not sure of
  • 43R, two of them (left edge by the Input wire, and right of IC2): printed clearly, unusual value; a 43K is also on the board lower left
  • 430K top right next to Z1: printed clearly, unusual value
  • 2u2 right of IC1: drawn as a blue box, not a round can, so not marked electrolytic
RefValueNormalizedTypeNotes
Resistors 9
×227K27kread from the layout by eye
×243R43read from the layout by eye
×210K10kread from the layout by eye
×1430K430kread from the layout by eye
×1330R330read from the layout by eye
×11K51.5kread from the layout by eye
×143K43kread from the layout by eye
×15K65.6kread from the layout by eye
×1100K100kread from the layout by eye
Capacitors 5
×4330n330nread from the layout by eye
×2100n100nread from the layout by eye
×1470p470pread from the layout by eye
×12u22.2udrawn as a box; read from the layout by eye
×233u33uelectrolytic; read from the layout by eye
Diodes 2
Z11N52271N5227 / 3V6zener; read from the layout by eye
Z21N52271N5227 / 3V6zener; read from the layout by eye
ICs 2
IC1HT8950HT8950read from the layout by eye
IC2TL072TL072read from the layout by eye
Potentiometers 3
ControlB500KB500kPotentiometerread from the layout by eye
VolumeA100KA100kPotentiometerread from the layout by eye
GainB1MB1MPotentiometerread from the layout by eye
Switches 4
UpSPST momentarySPST MOMENTARYread from the layout by eye
DownSPST momentarySPST MOMENTARYread from the layout by eye
VibratoSPST momentarySPST MOMENTARYread from the layout by eye
RobotSPST momentarySPST MOMENTARYread from the layout by eye

Other boards based on the Death By Audio Robot