HardLabs

Pattern sequencer

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

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

About the Pattern sequencer PCB

Pattern 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 76 × 150.1 mm, with 65 components from 19 distinct parts.

Its main chip is the Arduino_Nano_v3.x, from the AVR/Arduino family. By type, the board carries 28 resistors, 13 connectors, 12 diodes, 7 switches, 2 capacitors and 1 module.

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 Pattern sequencer

Arduino_Nano_v3.x

Pattern sequencer bill of materials (BOM)

65 components, 19 distinct parts.

QtyPartRefs
1
Arduino_Nano_v3.x
A1
3
Power
J1, J2, J6
2
Conn_01x03_Socket
J3, J4
2
Out 3
J5, J12
2
Out 2
J7, J11
3
Out 1
J8, J9, J10
1
External Clock
J13
1
100K - Tempo
RV1
1
100K - Num Steps
RV2
1
IN 1
SW1
1
IN 2
SW2
1
IN 3
SW3
1
Clock Divider Base Division
SW4
1
External Clock Select
SW5
1
SHIFT
SW6
1
Mode Select
SW7
12
LED (Red)
D1, D2, D3, D4, D5, D6, D7, D8 +4
2
100nf
C2, C3
28
1K
R1, R2, R3, R4, R5, R6, R7, R8 +20

Pattern 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.

Pattern sequencer: common questions

What microcontroller does the Pattern sequencer use?

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

How big is the Pattern sequencer PCB?

The Pattern sequencer measures 76 × 150.1 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Pattern sequencer?

65 components, from 19 distinct parts. The full bill of materials is listed on this page.

Where can I download the Pattern 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 Pattern 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 Pattern 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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