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
- 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
Jacks
- J6 on the controls card and J37 on the I/O card
Daughtercard Connectors
J5, J37 - POT connectione
J6 - Eurorack Power
- J6 on the I/O card
- Eurorack power
- 2x5 IDC
- GATE, CV not connected
J10 - Jacks connections on Controls card
J38 - Jacks connections
Examples
Arduino NANO MOZZI
NANO Pinout
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
Audio Out Schematic
CV In Schematic
Parts
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
- Output voltage Levels are assignable via jumpers
- +5V/GND
- +12V/-12V
- +12V/GND
- 8 pin Opamps
3D PCB Layout
- Board soldermask is actually black, but shown in green for contrast
Schematic
Opamp buffers
- Voltage selection headers
Output jacks
- Jack grounds connected on Controls card (3 jumpers)
- Single ground connection on daughtercard (1 jumper)
Pots on Controls card
- Connections of CW and CCW
- RV1 goes to RV2
- RV3 goes to RV4
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