ER-MOZZI-DB-03

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

Features

  • Daughtercard to ER-PROTO-02 card
    • Uses Front Panel and Controls card
      • Controls card populated as required
        • Up to 6 Pots
        • Up to 5 in/out jacks
        • High Def Sound output jack
  • Arduino Nano

Arduino Pins

  • The Arduino NANO has 8 Analog Inputs (0-7)
  • The Arduino NANO has 11 Digital I/O pins (2-13)
  • The ER-PROTO-02 controls card has 6 pots (RV1-RV6) and 6 jacks (J1-J6)
    • 6 Pots are brought into the card
    • 6 Jacks are brought into the card
      • J1-J5 Jacks can be used for analog inputs, digital inputs or digital outputs
      • J6 Jack is a dedicated output (J6) connected to Hi Def output Arduino pins D9, D10

Jacks Pin Protection Circuit

  • Example circuit configured as input
    • Same circuit on all 5 J1-J5 jacks

ER-MOZZI-DB-03 IO PROTECT.PNG

  • Configured as input
    • I/O Protection
      • Diode Clamps
    • Series resistor (R12 in example)
      • Works along with diode clamps
      • 10K Typical value
    • Parallel resistor (R13 in example)
      • 100K typical value
      • Lightly pulls input to ground when no jack is connected
    • Parallel capacitor (C13 in example)
      • 10nF or 0.1uF are typical values
      • Smooths analog input (noise reduction)
    • 0 Ohm Series resistor on Controls card for 5V inputs
      • Goes to jack tip pin
  • Configured as output
    • I/O Protection - Diode Clamps
    • 0 Ohm Series resistor (R12 in example)
    • DNP (Do Not Populate) Parallel resistor (R13 in example)
    • DNP Parallel capacitor (C13 in example)
    • Typical 470 or 1K Ohm Series resistor on Controls card
      • Goes to jack tip pin
      • Works along with diode clamps

Jacks Pin Protection Circuit Reference Designator cross reference table

  • Location of input circuitry on cards

ER-MOZZI-03 J1-J5 PROT.png

JACK R SERIES R PARALLEL C PARALLEL DIODES
J1 R3 R4 C10 D3/D4
J2 R1 R2 C9 D1/D2
J3 R7 R8 C12 D7/D8
J4 R5 R6 C11 D5/D6
J5 R12 R13 C13 D9/D10

Jacks/Headers

ER-MOZZI-03 CAD REAR.PNG

J1 - Arduino Analog Pins

ER-MOZZI-DB-03 J1.PNG

J2 - Jacks Pins

ER-MOZZI-DB-03 J2.PNG

J7 - Jacks connections to Controls card

ER-MOZZI-DB-03 J7.PNG

J8 - Pots connections to Controls card

ER-MOZZI-DB-03 J8.PNG

J9 - Eurorack Power

  • Power filter

ER-MOZZI-DB-03 J9.PNG

J10 - Arduino Digital Pins

ER-MOZZI-DB-03 J10.PNG

Software / Example Projects

HAGIWO MOZZI builds

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

HAGIWO ADDITIVE VCO.png

  • 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.png

  • 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.png

  • 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

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 CV SCHEMATIC-720PX.png

Issues

Rev 1

Assembly Sheet