HardLabs

Mica

dialgorithm·mica·KiCad/mica.kicad_pcb

Mica PCB layout, top view — open source ESP32 board by dialgorithm

About the Mica PCB

Mica is an open source ESP32 PCB design by dialgorithm, published on GitHub. It is a 2-layer board measuring 36.8 × 36.6 mm, with 16 components from 15 distinct parts.

Its main chip is the XIAO-ESP32-S3-SMD, from the ESP32 family. By type, the board carries 4 test points, 3 resistors, 2 capacitors, 1 IC, 1 transistor and 1 connector.

It belongs with the robotics & motion and iot & wireless designs in this gallery.

From the project

xiao esp32s3 based elrs drone with custom flight controller

mica is a compact wireless FPV drone built around an XIAO ESP32-S3, with a custom-designed flight controller and a custom 3D-printed frame. The project focuses on building a lightweight, self-contained drone platform with ExpressLRS (ELRS) control, custom electronics, and a mechanical design tailored specifically to the hardware.

- XIAO ESP32-S3 as the main flight controller - Custom-designed flight controller PCB - ExpressLRS (ELRS) for wireless control - Custom 3D-printed frame

Mica, from the project README
From the project README

Main components on the Mica

XIAO-ESP32-S3-SMD

Mica bill of materials (BOM)

16 components, 15 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
XIAO-ESP32-S3-SMD
U1
1
2N3906
Q1
1
J_IMU
J1
1
3V3
3V3
1
ELRS_5V
5V
1
ESC_5V
E5V
1
ESC_M1
TP3
1
ESC_M2
TP4
1
ESC_M3
TP5
1
ESC_M4
TP6
1
1N5819
D1
2
100nF
C1, C2
1
3.3k
R1
1
22k
R2
1
2.2k
R3

Mica design files

The KiCad project lives in the dialgorithm/mica repository on GitHub; these links point at the commit this page was built from.

Mica: common questions

What microcontroller does the Mica use?

The Mica is built around the XIAO-ESP32-S3-SMD, from the ESP32 family.

How big is the Mica PCB?

The Mica measures 36.8 × 36.6 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Mica?

16 components, from 15 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Mica design files?

From the dialgorithm/mica repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Mica design in my own project?

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

Can I test firmware for the Mica 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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