HardLabs

Note sequencer

gridbugs·modular2·note-sequencer/note-sequencer.kicad_pcb

Note sequencer PCB layout, top view — open source AVR/Arduino board by gridbugs

About the Note sequencer PCB

Note sequencer is an open source AVR/Arduino PCB design by gridbugs, published on GitHub under the MIT license. It is a 2-layer board measuring 159.4 × 184.3 mm, with 101 components from 52 distinct parts.

Its main chip is the Arduino_Nano_v3.x, from the AVR/Arduino family. Other key parts include the TL072. By type, the board carries 35 switches, 32 diodes, 14 connectors, 9 resistors, 4 ICs and 3 capacitors.

From the project

A modular synthesizer, where modules are designed as close to bare PCBs as is practical/safe. This is the spiritual successor to the briefcase modular synthesizer.

Main components on the Note sequencer

TL072Arduino_Nano_v3.x

Note sequencer bill of materials (BOM)

101 components, 52 distinct parts.

QtyPartRefs
1
TL072
U1
2
~
U2, U4
1
~
U3
2
Arduino_Nano_v3.x
A1, A2
2
Pitch
J1, J9
2
Gate
J2, J10
3
Power
J3, J4, J5
1
Conn_01x06_Socket
J6
2
Velocity
J7, J11
2
Clock
J8, J12
1
LED Socket
J13
1
Conn_01x06_Pin
J14
2
10K
RV1, RV2
2
SW_DIP_x01
SW1, SW2
1
X1
SW3
1
X2
SW4
1
X4
SW5
1
X3
SW6
1
RotaryEncoder_Switch
SW7
1
Mode
SW8
Show 32 more
QtyPartRefs
1
Clock Source
SW9
1
C#1
SW10
1
D#1
SW11
1
F#1
SW12
1
G#1
SW13
1
A#1
SW14
1
C1
SW15
1
D1
SW16
1
F1
SW17
1
E1
SW18
1
G1
SW19
1
A1
SW20
1
B1
SW21
2
C2
SW22, SW28
1
C#2
SW23
1
D#2
SW24
1
F#2
SW25
1
G#2
SW26
1
A#2
SW27
1
D2
SW29
1
E2
SW30
1
F2
SW31
1
G2
SW32
1
A2
SW33
1
B2
SW34
1
C3
SW35
1
LED
D1
31
1N4148
D2, D3, D4, D5, D6, D7, D8, D9 +23
3
100nf
C1, C2, C3
2
5.1K
R1, R4
5
1K
R2, R3, R5, R6, R7
2
4.7K
R8, R9

Note sequencer design files

The KiCad project lives in the gridbugs/modular2 repository on GitHub; these links point at the commit this page was built from.

Note sequencer: common questions

What microcontroller does the Note sequencer use?

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

How big is the Note sequencer PCB?

The Note sequencer measures 159.4 × 184.3 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Note sequencer?

101 components, from 52 distinct parts. The full bill of materials is listed on this page.

Where can I download the Note sequencer design files?

From the gridbugs/modular2 repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Note sequencer design in my own project?

Yes, under the terms of its MIT license, which gridbugs chose for the repository.

Can I test firmware for the Note sequencer 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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