ER-MOZZI-DB

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ER-PROTO-02-MOZZI-DB P1080850-720PX.jpg

Features[edit]

  • Daughtercard to ER-PROTO-02 card
    • Uses Front Panel and Controls card
      • Controls card populated as required
        • 0-6 Jacks, 0-6 Pots
  • Arduino NANO
  • High Def Sound output
  • Up to 6 Pots connected to A/D inputs
  • Up to 4 input jacks connected to A/D inputs
  • Options
    • 0-4 Pots, 0-4 Input Jacks
    • 5 Pots, 0-3 Input Jacks
    • 6 Pots, 0-2 Input Jacks

Arduino Pins[edit]

  • The ER-PROTO-02 controls card has 6 pots (RV1-RV6) and 6 jacks (J1-J6)
  • One jack is a dedicated output (J6) connected to Hi Def output Arduino pins D9, D10
  • The Arduino NANO has 8 Analog Inputs (0-7)
  • RV1-RV3 go to Analog Inputs 0-2
  • 3 Analog Inputs (Analog Inputs 3-5) get shared between 3 pots (RV4-RV6) and 3 jacks (J1-J3)
    • If a jack is inserted, the jack is used and the pot is not connected
    • If a jack is not inserted, the pot is used
  • 2 Jacks (J4-J5) go to Analog Inputs 6-7

A0 - Analog Input 0[edit]

  • RV1 wiper, 0-5V
  • Install jumpers on controls card to pull up/down lines to pots

A1 - Analog Input 1[edit]

  • RV2 wiper, 0-5V
  • Install jumpers on controls card to pull up/down lines to pots

A2 - Analog Input 2[edit]

  • RV3 wiper, 0-5V
  • Install jumpers on controls card to pull up/down lines to pots

A3 - Analog Input 3[edit]

  • J1 input Jack, 0-5V if jack is plugged into J1
  • RV4 wiper if no jack is plugged into J1

A4 - Analog Input 4[edit]

  • J2 input Jack, 0-5V if jack is plugged into J2
  • RV5 wiper if no jack is plugged into J2
  • Could be used for I2C SDA connection (no pot, no jack)

A5 - Analog Input 5[edit]

  • J3 input Jack, 0-5V if jack is plugged into J3
  • RV6 wiper if no jack is plugged into J3
  • Could be used for I2C SCL connection (no pot, no jack)

A6 - Analog Input 6[edit]

  • J4 Jack, 0-5V
  • Could be either input or output
    • Parts population option

A7 - Analog Input 7[edit]

  • J5 Jack, 0-5V
  • Could be either input or output
    • Parts population option

J7 - Jacks[edit]

  • 2x8 header
    • Female on controls card
  • Rev 1 has J2, J6 connections reversed vs ER-PROTO-02 card

ER-MOZZI-DB J7.PNG

J8 - Pots[edit]

  • 2x10 header
    • Female on controls card

J10 - Digital 6-13[edit]

  • D9, D10 shared with MOZZI Digital

D9, D10 - High Def Audio Out[edit]

  • J6 - Stereo 3.5mm jack (PJ-366ST)
  • Same output on both stereo channel

J9 - Eurorack Power[edit]

  • Power filter

ER-MOZZI-DB J9.PNG

J10 - Digital I/O[edit]

ER-MOZZI-DB J10.PNG

  • Pinout
  1. D0/RX
  2. D1/TX
  3. D6
  4. D7
  5. D8
  6. D9
  7. D10
  8. D11
  9. D12
  10. D13
  11. +5V
  12. GND

Software / Example Projects[edit]

HAGIWO MOZZI builds[edit]

ER-PROTO-02-MOZZI-DB P1080857-720pxV.jpg

  • HAGIWO builds
  • Pots
    • Install RV1-RV4 = 100K
    • Install series resistor R1-R3 1K
    • Install Pull-up/Pull-down jumpers
  • Jacks
  • J3-J5 = PJ398SM
  • J6 = PJ366ST

Additive VCO[edit]

HAGIWO ADDITIVE VCO.png

  • 3 pots (Fundamental Frequency, Harmonics Gain, Harmonic)
  • 3 CV input jacks (V/Oct, Gain, Harmonic)
  • 1 PWM output jack
  • Additive VCO Code

Chord VCO[edit]

HAGIWO CHORD VCO.png

  • 3 pots (Root Frequency, Inversion, Chord/Wave)
  • 3 CV input jacks (V/Oct, Inversion, Chord/Wave)
  • 1 PWM output jack
  • CHORD VCO Code

FM VCO[edit]

HAGIWO FM VCO.png

  • 3 pots (Carrier Frequency, Mod Freq, Mod Level)
  • 3 CV input jacks (V/Oct, Mod Freq, Mod Level)
  • 1 PWM output jack

Triple Mode VCO[edit]

  • FM, Additive, Chord modes
  • Started from Testbld Code base
    • Removed mode select switch
  • Add RV4 mode select knob to select between modes (Analog 3)
    • Add RV4 = 100K to controls card
    • Add R4 = 1K to controls card
    • Add C2 = 0.1uF to controls card
    • Add R4 = 0 ohms jumper to daughtercard

HAGIWO Bezier Random CV Generator[edit]

HAGIWO BEZIER CV SCHEMATIC-720PX.png

Issues[edit]

Rev 1[edit]

  • Switch on jacks between RV and J not wired correctly
    • Fixed in Rev 2 schematic
    • Could cut pots and wire manually
    • More easily just don't populate jack or pots that are not needed
  • J2, J6 reversed on schematics (Ctrls and ER-MOZZI-DB cards)
  • Add jumper J6-T to R13 other side from J2-T)

Assembly Sheet[edit]