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Marble sequencer control tracks circuits 2

felicien-brochu·midi_marble_sequencer·hardware/pcb/pcb_controls_tracks/marble_sequencer_control_tracks_circuits_2.kicad_pcb

Marble sequencer control tracks circuits 2 PCB layout, top view — open source ESP32 board by felicien-brochu

About the Marble sequencer control tracks circuits 2 PCB

Marble sequencer control tracks circuits 2 is an open source ESP32 PCB design by felicien-brochu, published on GitHub. It is a 2-layer board measuring 155 × 61 mm, with 43 components from 12 distinct parts.

Its main chip is the ESP32-WROOM-32D_30_pins_devboard, from the ESP32 family. Other key parts include the HP4067_track_select_buttons and HP4067_track_select_leds. By type, the board carries 16 switches, 16 diodes, 4 resistors, 3 ICs, 2 connectors and 2 capacitors.

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 control tracks circuits 2

HP4067_track_select_buttonsESP32-WROOM-32D_30_pins_devboardHP4067_track_select_leds

Marble sequencer control tracks circuits 2 bill of materials (BOM)

43 components, 12 distinct parts.

QtyPartRefs
1
HP4067_track_select_buttons
U1
1
ESP32-WROOM-32D_30_pins_devboard
U2
1
HP4067_track_select_leds
U3
1
Conn_01x02_Power_Supply
J1
1
Conn_01x02_I2C
J2
16
SW_Push
SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +8
16
LED
D1, D2, D3, D4, D5, D6, D7, D8 +8
1
C_0.1uF_HF_filter_104
C1
1
C_10uF_bulk_decoupling
C2
1
20KR
R1
2
2KR
R2, R3
1
620R
R4

Marble sequencer control tracks circuits 2 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 control tracks circuits 2: common questions

What microcontroller does the Marble sequencer control tracks circuits 2 use?

The Marble sequencer control tracks circuits 2 is built around the ESP32-WROOM-32D_30_pins_devboard, from the ESP32 family.

How big is the Marble sequencer control tracks circuits 2 PCB?

The Marble sequencer control tracks circuits 2 measures 155 × 61 mm, has 2 copper layers and is 1.58 mm thick.

How many components are on the Marble sequencer control tracks circuits 2?

43 components, from 12 distinct parts. The full bill of materials is listed on this page.

Where can I download the Marble sequencer control tracks circuits 2 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 control tracks circuits 2 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.

Can I test firmware for the Marble sequencer control tracks circuits 2 without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.

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