Difference between revisions of "ER-PROTO-01"

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* NODE: VCC, RV1-1 to RV3-1
 
* NODE: VCC, RV1-1 to RV3-1
 
* NODE: VCC, RV2-1 to RV4-1
 
* NODE: VCC, RV2-1 to RV4-1
 +
 +
==== Daughtercard wiring ====
 +
 +
* NODE: J1-T, J38-1 to U1-
 +
* NODE: J2-T, J38-5 to U1-
 +
* NODE: J3-T, J38-3 to U2-
 +
* NODE: J4-T, J38-7 to U2-
 +
* NODE: GND, J38-4
  
 
==== Daughtercard Parts List ====
 
==== Daughtercard Parts List ====

Revision as of 13:58, 9 November 2022

ER-PROTO-PANEL-01-SET FRONT REAR-3D-720px.png

Features

  • Eurorack Prototyping card set
  • 6 HP wide (30mm) front panel
  • 3U tall
  • Three card set
    • Board interconnect headers duplicated on headers
    • 30mm wide front panel
    • 28mm wide panel and daughtercards
  • 6 POTS
    • Marked as RV1-RV5
    • Series resistors on pot wiper
    • All 3 pot pins brought to top header
  • 4 Jacks
    • Marked as J1-J4
    • Tip/sleeve brought to header near middle/bottom
  • Pots on top, jacks on bottom of card
    • Easier to adjust pots without bumping into pots
    • Pots more often accessed than jacks
  • Large prototyping area
    • 58 nodes with 3 holes per node (29 per "side")
  • +12V, -12V down board edges
  • 5V/GND down center of card
  • Bussed connections horizontally
  • Front Panel with generic labels
    • Cover with White on Black P-Touch labels

Connectors

  • J1-J4 are front panel connectors

Inter-card Connectors

Pots

  • J5 on the Controls card and J5 on the I/O card
  • Pot connections
    • POTx-1 is fully CW connects to wiper
    • POTx-2 is wiper
    • POTX-3 is fully CCW connects to wiper

RV Conns.PNG

  • To make pot into voltage control
    • POTx-1 (CW) = +5V
    • POTx-13CCW = GND
    • Wire RV1-1 to RV3-1 to RV5-1 on controls card
    • Wire RV1-3 to RV3-3 to RV5-3 on controls card
    • Wire RV2-1 to RV4-1 to RV6-1 on controls card
    • Wire RV2-3 to RV4-3 to RV6-3 on controls card

ER-PROTO-CTLS-6-01 J5.PNG

Jacks

  • J6 on the controls card and J37 on the I/O card

ER-PROTO-CTLS-6-01 J10.PNG

Daughtercard Connectors

J5, J37 - POT connectione

ER-PROTO-DB-01 J5.png

ER-PROTO-DB-01 J37.png

J6 - Eurorack Power

  • J6 on the I/O card
    • Eurorack power
    • 2x5 IDC
    • GATE, CV not connected

ER-PROTO-DB-01 J6.png

J10 - Jacks connections on Controls card

ER-PROTO-DB-01 J10.png

J38 - Jacks connections

ER-PROTO-DB-01 J38.png

Examples

Arduino NANO MOZZI

NANO Pinout

Arduino-nano-pinout-720px.png

Controls

  • 6 Pots
    • RV1 = Analog 7
    • RV2 - Analog 4
    • RV3 - Analog 6
    • RV4 - Analog 3
    • RV5 - Analog 5
    • RV6 - Analog 2
  • 2 CV Input Jacks
    • J1 = Analog 0
    • J2 = Analog 1
  • 1 Output Jack
    • J4 = MOZZI HI DEF Audio

Audio Out Schematic

ER-MOZZI-AUDIO OUT SCHEM.PNG

CV In Schematic

  • ANA0 in example

ER-MOZZI-CV IN SCHEM.PNG

Parts

  • 3D view

ER-MOZZI-PARTS 3D.PNG

  • Top parts view

ER-MOZZI-PARTS DETAILS TOP-3D.PNG

  • Bottom parts view

ER-MOZZI-CV IN FILTER.PNG

  • With NANO

ER-MOZZI-NANO 3D.PNG

  • CAD placement

ER-MOZZI-PARTS CAD.PNG

Wires

NET: ANA0, A1-19, (C7-1, D1-2, D3-1, R9-2)
NET: ANA1, A1-20, (C8-1, D2-2, D4-1, R10-2)
NET: ANA2, A1-21, J37-3
NET: ANA3, A1-22, J37-6
NET: ANA4, A1-23, J37-9
NET: ANA5, A1-24, J37-12
NET: ANA6, A1-25, J37-15
NET: ANA7, A1-26, J37-18
NET: J1-T, J38-1, (R7-1, R9-1)
NET: J2-T, J38-5, (R10-1, R8-1)
NET: J4-T, J38-7, (C10-1, R14-2)
NET: GND1, J37-7
NET: GND2, J38-6
NET: GND3, A1-4
NET: GND4, A1-29
NET: +5VD, A1-27, J37-11
NET: L5V, J37-14, J37-8
NET: LGND, J37-16, J37-4

Parts List

Find Qty Ref Des Part Number
1 2 R7, R8 100K
2 2 R9, R10 10K
3 2 R11, R14 3.9K
4 2 R12, R13 1M
5 4 D1-D4 BAT41
6 8 C1-C8 0.1uF
7 1 C9 4.7nF
8 1 C10 10nF
9 1 J5 HEADER, 2X10
10 1 J6 HEADER, 2X8
11 1 J10 HEADER, 1x8
12 1 A1 Arduino_Nano_v3

Software

CV4 - 4 Control Voltages

  • Pot controlled CV generator
    • Useful for testing VCOs, etc
  • (4) Buffered Outputs
  • 4 Pots
    • RV1-RV4 used
    • RV5, RV6 not used
  • 4 Jacks
    • RV1 controls J1, etc
  • Output voltage Levels are assignable via jumpers
    • +5V/GND
    • +12V/-12V
    • +12V/GND

Opamp Choices

3D PCB Layout

  • Board soldermask is actually black, but shown in green for contrast

ER-PROTO-01-CV4 3D.png

  • Details

ER-PROTO-01-CV4 HDRS 3D.png

Schematic

Opamp buffers
  • Voltage selection headers

ER-PROTO-01-CV4 Opamps.PNG

Output jacks
  • Jack grounds connected on Controls card (3 jumpers)
  • Single ground connection on daughtercard (1 jumper)

ER-PROTO-01-CV4 OutputJacks.PNG

Pots on Controls card
  • Connections of CW and CCW
    • RV1 goes to RV2
    • RV3 goes to RV4

ER-PROTO-01-CV4 PotsOnControlsCard.PNG

Control Board Wiring
  • NODE: GND, J1-GND to J3-GND
  • NODE: GND, J2-GND to J4-GND
  • NODE: GND, J3-GND to J4-GND
  • NODE: GND, RV1-3 to RV3-3
  • NODE: GND, RV2-3 to RV4-3
  • NODE: VCC, RV1-1 to RV3-1
  • NODE: VCC, RV2-1 to RV4-1

Daughtercard wiring

  • NODE: J1-T, J38-1 to U1-
  • NODE: J2-T, J38-5 to U1-
  • NODE: J3-T, J38-3 to U2-
  • NODE: J4-T, J38-7 to U2-
  • NODE: GND, J38-4

Daughtercard Parts List

Find Qty Ref Des Part Number
1 4 H1-H4 Conn_01x03
2 1 J5 HEADER, 2X10
3 1 J6 HEADER, 2X8
4 1 J10 Conn_01x08
5 4 R5-R8 1K
10 2 R6, R7 1K
6 2 U1, U2 SOCKET, 8 PIN
7 2 U1, U2 TL072

Controls card Parts List

  • RV1-RV4 = B100K pots
  • R1-R4 = 1K
  • J1-J4 = PJ301BM
  • J5 = Socket, Female, 2x10
  • J10 = Socket, Female, 1x8

Slew Rate Controller

The D107 is a very simple dual slew rate limiter. It can be used for portamento effects or to smooth out a stepped voltage from a sequencer, or for general audio or CV smoothing. Each channel contains a buffer with 100K input impedance suitable for pitch CVs. The slew pot affects the charging of a large capacitor connected to a second amplifier. The second amp provides buffering for output to isolate the output jack from the actual slewing function.

Specifications:

Dual slew rate limiter
Control range of 0-10s (approx.)
Power: +12V @ 5mA, -12V @ 5mA

Video