Below you find some modules slowly leaving prototype phase. Each of them incorporates through-hole components, no SMD soldering skills needed. No documentation yet, except a short description, BOM (bill of materials) and schematic. Some PCBs require modification. If you find the existing information enough to build any of these modules (this assumes that you’re an experienced builder) you can order via e-mail: info@doboz.audio
Prices exclude shipping costs (EU: 9EUR, world: 12EUR)

VCA360

Dual channel linear VCA based around CEM/AS3360, 4HP.

I/O:
– CV input per channel
– signal input per channel
– signal output per channel

Controls:
– Bias (sets the initial level of amplifier)
– CV amount (sets the amount of attenuation for CV inputs)

[BOM][SCHEMATIC][PCB]
Price: 15€ (PCB set + white PCB panel)

MIX123

Triple channel audio/CV mixer/attenuverter, 4HP. Through-hole redesign of Mutable Instruments Shades, without LEDs and configurable constant voltage (fixed to +5V).

I/O:
– signal input per channel
– signal output per channel

Controls:
– Function switch (attenuverter/attenuator)
– Gain

[BOM][SCHEMATIC][PCB]
Price: 12€ (PCB set + white PCB panel)

BUCKET

MN3007 based 8HP module for chorus/flanger, (really) short echos, reverberation effects… and much more. Feedback can be pushed to self-oscillation.

I/O:
– IN (audio input)
– OUT (audio output)
– WET (wet output, delayed signal only)
– t (time CV input)
– FB (feedback CV input)
– MIX (mix CV input)

Controls:
– Drive (adjusts the level of input signal)
– Time (adjusts delay time)
– Range switch (sets the range of delay time, mid/short/long)
– Feedback (adjusts the level of delayed signal that is fed back to the input of BBD)
– Polarity switch (sets the polarity of delayed signal)
– Tone (adjusts the tone of delayed signal [also affects the level of feedback], CCW increases lows and cuts treble, CW it does the reverse)
– Mix (adjusts the ratio of dry and wet signal, ranges from 100% dry to almost 100% wet)
– Time CV amount (attenuates CV connected to “t” input)

[BOM][SCHEMATIC][MODIFICATION][PCB]
Price: 25€ (PCB set + black matte PCB panel)

VCF320

State variable filter with voltage controlled “Q” based around CEM/AS3320 chip, 6HP.

I/O:
– IN (audio input)
– COF (cutoff frequency CV input)
– V/O (Volt/octave input, tracks over 3-4 octaves)
– RES (resonance CV input)
– LP1 output
– LP2 output
– HP output
– BP output
– Notch output

Controls:
– input (adjusts the level of input signal)
– cutoff frequency CV input attenuverter
– f (cutoff frequency)
– resonance

[BOM][SCHEMATIC][PCB]
Price: 25€ (PCB set + black matte PCB panel)

KRYSA

Distortion/overdrive module inspired by guitar pedals utilizing diode clipping, 4HP.

I/O:
– IN (audio input)
– OUT (audio output)
– drive CV input

Controls:
– drive (adjusts the amount of distortion)
– tone (adjusts the tone of output, CCW increases lows and cuts treble, CW it does the reverse)
– diode switch (diode clipping off/on)
– input attenuator (sets the level of signal connected to input, for modular levels it should be kept low)
– drive CV attenuator

[BOM][SCHEMATIC][PCB]
Price: 15€ (PCB set + black matte PCB panel)

INPUT

Monophonic input module, amplifier for non-modular level signals (guitar, microphone, music player devices, etc.), built in envelope follower and gate detector, 4HP.

I/O:
– INPUT (audio input, 6.3mm jack)
– AMP (amplified audio output)
– E (envelope follower output)
– G (gate detector output)

Controls:
– level/AMP (adjusts the amplification of incoming signal, affects the response of “E” and “G” outputs)
– RESP switch (sets the overall response of the envelope follower, slow/fast)
– FALL switch (sets the fall/release time of the envelope follower, slow/fast)
– THRESHOLD (sets the level that the incoming audio must exceed for the module to generate a gate signal, the gate outputs behaviour depends a lot on the envelope followers output)

[BOM][SCHEMATIC][PCB]
Price: 15€ (PCB set + black matte PCB panel)