HardLabs

Midi2cv

tomarus·midi2cv·kicad/midi2cv/midi2cv.kicad_pcb

Midi2cv PCB layout, top view — open source AVR/Arduino board by tomarus
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About the Midi2cv PCB

Midi2cv is an open source AVR/Arduino PCB design by tomarus, published on GitHub. It is a 2-layer board measuring 81.3 × 96.5 mm, with 63 components from 39 distinct parts.

Its main chip is the Arduino_Nano_v3.x, from the AVR/Arduino family. Other key parts include the L7805, 24LC256, MCP4922, PC817 and TL074. By type, the board carries 25 connectors, 15 resistors, 9 capacitors, 8 ICs, 4 diodes and 1 module.

It belongs with the audio designs in this gallery.

From the project

Eurorack MIDI2CV and Arpeggiator using an Arduino Nano.

MIARPH * MIDI2CV + ARPEGGIATOR ==============================

Miarph is an Arduino based MIDI2CV converter with 4 0-5V 12 bit DAC's and 10 trigger outputs.

4 individual 0-5v 12 bit DAC's (MCP4922 based) 10 Trigger outputs Dual Arpeggiator SYSEX configurable. Two MIDI-CC controller outputs. Two Midi Note + Trigger outputs. Split note (single channel) or two individual channel operations. 8 individually programmable gate triggers to be either drum trigger or clock divider.

Midi2cv, from the project README
From the project README

Main components on the Midi2cv

L780524LC256MCP4922PC817TL07474HC595Arduino_Nano_v3.x

Midi2cv bill of materials (BOM)

63 components, 39 distinct parts.

QtyPartRefs
1
L7805
U1
1
24LC256
U2
2
MCP4922
U3, U4
1
PC817
U5
2
TL074
U6, U8
1
74HC595
U7
1
Arduino_Nano_v3.x
A1
1
ProgramJmpr
J1
1
Power
J2
3
Conn_01x04_Male
J3, J14, J15
3
Conn_01x04_Female
J4, J24, J25
1
Conn_01x08_Male
J5
1
Conn_01x08_Female
J6
1
Midi Input
J7
1
CV1 Output
J8
1
CV2 Output
J9
1
CTL1 Output
J10
1
CTL2 Output
J11
1
Gate1 Output
J12
1
Gate2 Output
J13
Show 19 more
QtyPartRefs
1
P1
J16
1
P2
J17
1
P3
J18
1
P4
J19
1
P5
J20
1
P6
J21
1
P7
J22
1
P8
J23
1
B10K
RV1
1
LED
D1
3
D
D2, D3, D4
1
100uF
C1
1
10uF
C2
7
100nF
C3, C4, C5, C6, C7, C8, C9
2
2K2
R1, R2
1
10K
R3
3
1K
R4, R5, R6
1
220/470
R7
8
100
R8, R9, R10, R11, R12, R13, R14, R15

Midi2cv design files

The KiCad project lives in the tomarus/midi2cv repository on GitHub; these links point at the commit this page was built from.

Midi2cv: common questions

What microcontroller does the Midi2cv use?

The Midi2cv is built around the Arduino_Nano_v3.x, from the AVR/Arduino family.

How big is the Midi2cv PCB?

The Midi2cv measures 81.3 × 96.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Midi2cv?

63 components, from 39 distinct parts. The full bill of materials is listed on this page.

Where can I download the Midi2cv design files?

From the tomarus/midi2cv repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Midi2cv design in my own project?

The repository has no license, so all rights stay with tomarus. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Midi2cv without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.

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