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CHORD VCO

ijnekenamay·HAGIWOs_Module·CHORD_VCO/CHORD_VCO.kicad_pcb

CHORD VCO PCB layout, top view — open source AVR/Arduino board by ijnekenamay
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About the CHORD VCO PCB

CHORD VCO is an open source AVR/Arduino PCB design by ijnekenamay, published on GitHub. It is a 2-layer board measuring 30 × 100 mm, with 37 components from 21 distinct parts.

Its main chip is the ARDUINO_NANO_V3.X, from the AVR/Arduino family. Other key parts include the MCP6L02x-xSN. By type, the board carries 13 resistors, 9 capacitors, 8 diodes, 5 connectors, 1 IC and 1 module.

It belongs with the audio designs in this gallery.

From the project

eurorack modular synthesizers projects using Arduino.

！！ Note ！！ - There is no control board in this project. The hardware should be mounted and wired to the panel. See HAGIWO's original schematic for details. - I will get feedback and improve it. - See the HAGIWO website for the Arduino code.

[LINK] HAGIWO/ハギヲ｜ note HAGIWO's Youtube channnel

CHORD VCO, from the project README
From the project README

Main components on the CHORD VCO

MCP6L02x-xSNARDUINO_NANO_V3.X

CHORD VCO bill of materials (BOM)

37 components, 21 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
MCP6L02x-xSN
U1
1
ARDUINO_NANO_V3.X
Arduino_Nano_v3.x
A1
1
1V/OCT
J1
1
INVERSION_CV
J2
1
CHORD_CV
J3
1
OUT
J4
1
POWER
J5
3
BAT43
D1, D4, D7
5
BAT43
D2, D3, D5, D6, D8
2
220PF
10nF
C1, C2
3
10nF
C3, C7, C8
3
68nF
C4, C5, C6
1
4.7uF
C9
4
470R
1k
R1, R2, R3, R8
1
22K
100R
R4
2
470R
100k
R5, R7
1
22K
1k
R6
1
22K
100k
R9
1
22K
499k
R10
2
3.9k
R11, R12
Show 1 more
QtyPartRefs
1
220R
R13

CHORD VCO design files

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

CHORD VCO: common questions

What microcontroller does the CHORD VCO use?

The CHORD VCO is built around the ARDUINO_NANO_V3.X, from the AVR/Arduino family.

How big is the CHORD VCO PCB?

The CHORD VCO measures 30 × 100 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the CHORD VCO?

37 components, from 21 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the CHORD VCO design files?

From the ijnekenamay/HAGIWOs_Module repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the CHORD VCO design in my own project?

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

Can I test firmware for the CHORD VCO 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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