HardLabs

Mbira3b

collaborative-music-lab·ESP_MIDI·PCB/Kicad/Main-PCB/mbira3b/mbira3b.kicad_pcb

Mbira3b PCB layout, top view — open source ESP32 board by collaborative-music-lab

About the Mbira3b PCB

Mbira3b is an open source ESP32 PCB design by collaborative-music-lab, published on GitHub. It is a 2-layer board measuring 135.3 × 29 mm, with 43 components from 11 distinct parts.

Its main chip is the Wifiduino-ESP32S3-SMD, from the ESP32 family. Other key parts include the LSM6DS3_Breakout, SM351LT, IS31FL3218-GR and ISL21070CIH325Z-TK. By type, the board carries 13 ICs, 13 capacitors, 9 diodes, 7 resistors and 1 connector.

It belongs with the audio, iot & wireless and sensors designs in this gallery.

From the project

ESP32-s3 midi controller

1. The main PCB, with the ESP32 pre-soldered 2. 4 potentiometers, 2 to place on the PCB and two additional off-board potentiometers with small pcbs. 3. 4 Arcade Buttons 4. An LSM6DS3 IMU breakout board 5. An RGB LED and resistors

Make sure get your enclosure drilled for your faceplate before you mount your PCB to the faceplate in step 9!!!

1. Place two potentiometers on the PCB. Make sure they are flat. It is a good idea to place the potentiometers on a faceplate to make sure they are aligned. Solder the potentiometers in place. the potentiometers go on the opposite side of the PCB from the…

Main components on the Mbira3b

LSM6DS3_BreakoutSM351LTIS31FL3218-GRISL21070CIH325Z-TK

Mbira3b bill of materials (BOM)

43 components, 11 distinct parts.

QtyPartRefs
1
LSM6DS3_Breakout
U1
1
~
U2
9
SM351LT
U3, U4, U5, U6, U7, U8, U9, U10 +1
1
IS31FL3218-GR
U12
1
ISL21070CIH325Z-TK
U16
1
Conn_01x04_Pin
J2
9
LTST-S326TBKFKT
D1, D2, D3, D4, D5, D6, D7, D8 +1
13
0.1uF
C1, C2, C3, C4, C5, C6, C7, C8 +5
4
R_Small_US
R1, R2, R4, R5
2
R_Small_US
R1a1, R2a1
1
10k
R3

Mbira3b design files

The KiCad project lives in the collaborative-music-lab/ESP_MIDI repository on GitHub; these links point at the commit this page was built from.

Mbira3b: common questions

What microcontroller does the Mbira3b use?

The Mbira3b is built around the Wifiduino-ESP32S3-SMD, from the ESP32 family.

How big is the Mbira3b PCB?

The Mbira3b measures 135.3 × 29 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Mbira3b?

43 components, from 11 distinct parts. The full bill of materials is listed on this page.

Where can I download the Mbira3b design files?

From the collaborative-music-lab/ESP_MIDI repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Mbira3b design in my own project?

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

Can I test firmware for the Mbira3b 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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