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Marble sequencer main circuits

felicien-brochu·midi_marble_sequencer·hardware/pcb/pcb_main/marble_sequencer_main_circuits.kicad_pcb

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

About the Marble sequencer main circuits PCB

Marble sequencer main circuits is an open source ESP32 PCB design by felicien-brochu, published on GitHub. It is a 2-layer board measuring 207 × 104 mm, with 35 components from 19 distinct parts.

Its main chip is the ESP32-S3-DevKitC, from the ESP32 family. Other key parts include the HP4067_IR_Sensor_read, HP4067_IR_led_power and HP4067_LED_Snake. By type, the board carries 7 connectors, 4 ICs, 3 resistors, 2 switches, 2 capacitors 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 main circuits

ESP32-S3-DevKitCHP4067_IR_Sensor_readHP4067_IR_led_powerHP4067_LED_Snake

Marble sequencer main circuits bill of materials (BOM)

35 components, 19 distinct parts.

QtyPartRefs
1
ESP32-S3-DevKitC
U1
1
HP4067_IR_Sensor_read
U2
1
HP4067_IR_led_power
U3
1
HP4067_LED_Snake
U4
1
BC337
Q1
1
Conn_02x16_sensor_board_power_sens
J1
1
Conn_01x06_Pin_Sensor_select
J2
1
Conn_01x17_Pin_LED_Snake
J3
1
Conn_01x02_I2C
J4
1
Conn_01x03_USB
J5
1
Conn_01x02_Boot_Select_Button
J6
1
Conn_01x02_Power_Supply
J7
16
Pot 5KR
RV1, RV2, RV3, RV4, RV5, RV6, RV7, RV8 +8
2
SW_Push
SW1, SW2
1
C_10uF_bulk_decoupling
C1
1
C_0.1uF_HF_filter_104
C4
1
150R
R1
1
20KR
R11
1
620R
R12

Marble sequencer main 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 main circuits: common questions

What microcontroller does the Marble sequencer main circuits use?

The Marble sequencer main circuits is built around the ESP32-S3-DevKitC, from the ESP32 family.

How big is the Marble sequencer main circuits PCB?

The Marble sequencer main circuits measures 207 × 104 mm, has 2 copper layers and is 1.58 mm thick.

How many components are on the Marble sequencer main circuits?

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

Where can I download the Marble sequencer main 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 main 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.

Can I test firmware for the Marble sequencer main circuits 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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