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Polykit Kosmo Multitool

polykit·kosmo-multitool

Polykit Kosmo Multitool PCB layout, top view — open source AVR/Arduino board by polykit
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About the Polykit Kosmo Multitool PCB

Polykit Kosmo Multitool is an open source AVR/Arduino PCB design by polykit, published on GitHub under the CC-BY-NC-4.0 license. It is a 2-layer board measuring 60 × 150 mm, with 90 components from 31 distinct parts.

Its main chip is the Arduino Nano Every, from the AVR/Arduino family. Other key parts include the TL074, 74LS14, 6N137 and L7805. By type, the board carries 37 resistors, 19 diodes, 12 connectors, 10 capacitors, 4 ICs and 4 switches.

It belongs with the audio and displays & leds designs in this gallery.

From the project

Arduino Nano Every based development platform for DIY synthesizer enthusiasts.

This repository contains schematics, PCB and source code for a synthesizer module in Kosmo format. This module consists of an Arduino Nano Every, CV and gate input and output options, MIDI, rotary encoder and an OLED display. It is meant as a development platform for DIY synthesizer enthusiasts.

Here is a full list of features: - 4x CV input (0-10V) - 4x CV output (0-10V) - 4x gate/trigger in - 4x gate/trigger out - 1.3" OLED display - DIN serial MIDI in/through/out - Rotary encoder with switch - 3 switches - 2 LEDs

Polykit Kosmo Multitool, from the project README
From the project README

Main components on the Polykit Kosmo Multitool

TL07474LS146N137L7805Arduino Nano Every

Polykit Kosmo Multitool bill of materials (BOM)

90 components, 31 distinct parts.

QtyPartRefs
1
TL074
U1
1
74LS14
U2
1
6N137
U3
1
L7805
U4
1
Arduino Nano Every
A1
1
MIDI_IN
J1
1
Display I2C
J2
1
GATE_IN
J3
1
GATE_OUT
J4
1
ADS1115 breakout
J5
1
MIDI_THRU
J6
1
MIDI_OUT
J7
1
MCP4728 breakout
J8
1
CV_IN
J9
1
CV_OUT
J10
1
I2C
J11
1
A7 A6
J12
1
POWER
POWER1
3
SW_Push
SW1, SW2, SW3
1
Rotary_Encoder_Switch
SW4
Show 11 more
QtyPartRefs
17
1N4148
D1, D2, D3, D4, D5, D6, D7, D8 +9
2
LED
D17, D18
2
Ferrite_Bead
FB1, FB2
7
100n
C1, C2, C3, C4, C6, C7, C8
3
10uF
C5, C9, C10
8
1k*
R1, R2, R3, R4, R11, R12, R15, R16
4
22k
R5, R8, R13, R14
8
1k
R6, R7, R19, R20, R21, R22, R23, R24
4
33k
R9, R10, R17, R18
8
220
R25, R26, R27, R29, R30, R31, R32, R33
5
10k
R28, R34, R35, R36, R37

Polykit Kosmo Multitool design files

The KiCad project lives in the polykit/kosmo-multitool repository on GitHub; these links point at the commit this page was built from.

Polykit Kosmo Multitool: common questions

What microcontroller does the Polykit Kosmo Multitool use?

The Polykit Kosmo Multitool is built around the Arduino Nano Every, from the AVR/Arduino family.

How big is the Polykit Kosmo Multitool PCB?

The Polykit Kosmo Multitool measures 60 × 150 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Polykit Kosmo Multitool?

90 components, from 31 distinct parts. The full bill of materials is listed on this page.

Where can I download the Polykit Kosmo Multitool design files?

From the polykit/kosmo-multitool repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Polykit Kosmo Multitool design in my own project?

It is published under CC-BY-NC-4.0, which limits how it may be reused; read the license before building on it.

Can I test firmware for the Polykit Kosmo Multitool 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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