Marble sequencer circuits

felicien-brochu·midi_marble_sequencer·hardware/pcb/pcb_ir_sensors/marble_sequencer_circuits.kicad_pcb

Marble sequencer circuits PCB layout, top view — open source board by felicien-brochu

About the Marble sequencer circuits PCB

Marble sequencer circuits is an open source PCB design by felicien-brochu, published on GitHub. It is a 2-layer board measuring 290 × 51.6 mm, with 53 components from 6 distinct parts.

Other key parts include the HP4067_16_ch_analog_mutiplexer_devboard and QRE1113GR. By type, the board carries 32 resistors, 17 ICs, 3 connectors and 1 transistor.

It belongs with the audio designs in this gallery.

From the project

A MIDI sequencer using marbles.

MIDI Marble Sequencer is a hardware + firmware project that detects marbles on IR sensor tracks and outputs MIDI over USB. The system is split into a main ESP-IDF firmware (sequencer + USB MIDI) and ESP32-based control boards (Arduino/PlatformIO) connected over I2C.

- hardware/ — CAD (SolidWorks parts/assemblies) and related manufacturing files. - software/ - midimarblesequencermain/ — main firmware (ESP-IDF) for the sequencer + USB MIDI. - midimarblesequencercontrolsmain/ — main control board firmware (PlatformIO/Arduino). - midimarblesequencercontrolspages/ — pages control board firmware…

Main components on the Marble sequencer circuits

HP4067_16_ch_analog_mutiplexer_devboard QRE1113GR

Marble sequencer circuits bill of materials (BOM)

53 components, 6 distinct parts.

Qty	Part	Footprint	Refs
1	HP4067_16_ch_analog_mutiplexer_devboard	HP4067_16_ch_analog_mutiplexer_devboard	U1
16	QRE1113GR	QRE1113GR	U2, U3, U4, U5, U6, U7, U8, U9 +8
1	BD235	TO-126-3_Vertical	Q1
2	Conn_01x06_Pin	PinHeader_1x06_P2.54mm_Vertical	J1, J2
1	Conn_01x02_Pin	PinHeader_1x02_P2.54mm_Vertical	J3
32	R	R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal_BIG_PADS	R1, R2, R4, R5, R6, R7, R8, R9 +24

Marble sequencer circuits design files

The KiCad project lives in the felicien-brochu/midi_marble_sequencer repository on GitHub; these links point at the commit this page was built from.

Marble sequencer circuits: common questions

How big is the Marble sequencer circuits PCB?

The Marble sequencer circuits measures 290 × 51.6 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Marble sequencer circuits?

53 components, from 6 distinct parts. The full bill of materials is listed on this page.

Where can I download the Marble sequencer circuits design files?

From the felicien-brochu/midi_marble_sequencer repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Marble sequencer circuits design in my own project?

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

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