ER-PROTO-02

Features

• Eurorack Prototyping 3 card set
  • Front panel card
  • Controls
  • Prototyping daughtercard
• 6 HP wide (30mm) front panel
• Controls and prototyping cards are 28mm wide
• 3U tall
• Pots on top, jacks on bottom
  • Easier to adjust pots without bumping into pots
  • Pots are more often accessed than jacks
• 0-6 POTS
  • Series resistors on pot wiper on controls card
  • All 3 pot pins brought to top header
  • Jumpers on control card allow GND/VCC to be set on pot ends
• 0-6 "Thinkicon style" Jacks
  • Can use stereo or mono jacks
  • Tip/ring brought to header near bottom
• Large prototyping area
• Power/GND down center of card
• Bussed connections horizontally
• Front Panel has generic labels
  • Cover with White on Black P-Touch labels
• Eurorack power connector - can use either 2x5 or 2x8 IDC box connector
  • Series resistors/protection diodes on +12/-12V connections

Daughtercard Prototyping Area

• +5V connections are directly connected to +5V pins on IDC connector if 16 pin IDC connector is used
• If a 10 pin IDC connector is used the +5V connections are no connected to the Eurorack power
• This is used with an Arduino Nano or Arduino Pro Mini, RAW power can be fed from the +12V and the +5V gets connected to the Arduino module

Optional 5V regulator on card

• Can also put a regulator on the card
• RA1 is R1 on daughtercard
• R1/D1 are on the card

Example Card Stackup

• Female sockets mounted to rear of controls card
• Male pin headers mounted to "rear" of daughtercard

Jacks/Headers/Pots

Controls Card - Jacks/Headers/Pots

• 0-6 Jacks
• 0-6 Pots
• Headers to connect to Prototyping card

J1-J6 Jacks

• Jacks have resistors on Tip/Ring-Switch
  • Typically Tip = 0 Ohm jumper, Ring/Switch = Do Not Populate (DNP on schematic)
• Tip resistors: R7, R9, R11, R13, R15, R17
• Ring/Switch resistors: R8, R10, R12, R14, R16, R18

J7 Header

• 2x8 female header

J8 Header

• 2x10 female headers

Pots

• Pots have optional pull-up/pulldown jumper positions
  • Install jumpers if pots are used as controls voltages
  • Do not install jumpers if pots are used as volume control voltages

Prototyping Daughtercard

• Controls card connections are typically male headers

J8, J28 - Pot connections

J7, J29 - Jack connections

J9 - Eurorack Power

• Can install 2x8 or 2x5 IDC box header
• D1/R1 Diode/resistor for +12V power
  • Shown with 2x5 box header

Schematics

• ER-PROTO-02-CTLS Rev 1 Schematic
• ER-PROTO-02-DB Rev1 Schematic

Mechanicals

Examples

Cards built on the PROTO-02 card set

ER-BEZIER-CV

• ER-BEZIER-CV - Random Control Voltages (CVs)

ER-CV-AMP3

• ER-CV-AMP3 - Amplify CVs or GATES by 2

ER-DELAY-01

• ER-DELAY-01 - Echo

ER-GATE-SEQ-01

• ER-GATE-SEQ-01 - GATE Sequencer

ER-LEDS

• ER-LEDS - Control a NeoPixel strip

ER-MOZZI-DB

• ER-MOZZI-DB - VCOs based on MOZZI

ER-MOZZI-DB-03

• ER-MOZZI-DB-03 - Flexible MOZZI

ER-MOZZI-DRUMS

• ER-MOZZI-DRUMS - Drums module

ER-SCOPE-01

• ER-SCOPE-01 - Scope

ER-SH-02

• ER-SH-02

CV SHIFT on ER-PROTO-02

• CV SHIFT on ER-PROTO-02

ER-STIX

• ER-STIX - Mutable Instruments Branches "like"

ER-USB-MIDI

• ER-USB-MIDI - USB MIDI to TRS A

Issues

Rev 2 Control Card

• Clean up silkscreen overlaps near R1, D1, STRIPE

Rev 1

• No Issues notes

Assembly Sheet

• ER-PROTO-02 Rev 1 Assembly Sheet