ER-MOZZI-DB-03

Features

• 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

• 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

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

A1 - Analog Input 1

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

A2 - Analog Input 2

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

A3 - Analog Input 3

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

A4 - Analog Input 4

• 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

• 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

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

A7 - Analog Input 7

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

J7 - Jacks

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

J8 - Pots

• 2x10 header
  • Female on controls card

J10 - Digital 6-13

• D9, D10 shared with MOZZI Digital

D9, D10 - High Def Audio Out

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

J9 - Eurorack Power

• Power filter

J10 - Digital I/O

• 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

• HAGIWO Bezier curve random CV generator
• HAGIWO Envelope Generator Module
• HAGIWO FM VCO Module
• HAGIWO Additive VCO (harmonic addition VCO)
• HAGIWO CHORD VCO with mozzi library
• Using Mozzi Library With 5 Potentiometers
• Atari Punk Synth V2
• Arduino Multi-pot Mozzi FM Synthesis
• Arduino mozzi FM VCO Module for 650 yen - Modular synth self-made
• Nuts and Volts AUDUINO Synth build for the Arduino NANO
  • Files for Nuts and Volts AUDUINO Synth
• MozMo = ATMega328 plus FTDI

HAGIWO MOZZI builds

• 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

• HAGIWO Additive VCO Notes

• 3 pots (Fundamental Frequency, Harmonics Gain, Harmonic)
• 3 CV input jacks (V/Oct, Gain, Harmonic)
• 1 PWM output jack
  • Output swings 1V-4V
• Additive VCO Code

Chord VCO

• HAGIWO Chord VCO

• 3 pots (Root Frequency, Inversion, Chord/Wave)
• 3 CV input jacks (V/Oct, Inversion, Chord/Wave)
• 1 PWM output jack
  • Output swings 2.5V +/- 100mV
• CHORD VCO Code

FM VCO

• HAGIWO FM VCO

• 3 pots (Carrier Frequency, Mod Freq, Mod Level)
• 3 CV input jacks (V/Oct, Mod Freq, Mod Level)
• 1 PWM output jack
  • Output swings 0-5V

• FM VCO Code

Triple Mode VCO

• FM, Additive, Chord modes
• Started from Testbld Code base
  • Replaced mode select switch with RV4 mode select pot
    • RV4 is on 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
• PWM output
  • Output swings 2V-3V

HAGIWO Bezier Random CV Generator

• HAGIWO Bezier Random CV Generator
  • HAGIWO Bezier Random CV Generator

Issues

Rev 1

• 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

• ER-MOZZI-DB Rev 1 Assembly Sheet