2 layers52.3 × 10.5 mm
StackLink
gusmanb/logicanalyzer
24 channel, 100Msps logic analyzer hardware and software
29 parts5.1kGPL-3.0
2 layers36.8 × 36.6 mm
Mica
dialgorithm/micaxiao esp32s3 based elrs drone with custom flight controller
- Size
- 36.8 × 36.6 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 29
- Nets
- 30
- Pads
- 68
- Tracks, vias
- 160, 18
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 20 Aug 2026
- Updated
- 18 Sep 2026
Overview
Mica is an open-source printed circuit board by dialgorithm, from the dialgorithm/mica repository on GitHub. It is a 2-layer board of 36.8 × 36.6 mm with 29 parts on 30 nets, routed with 160 tracks and 18 vias.
Its parts include 3 resistors, 2 capacitors, 1 IC, 1 diode and 1 transistor. It belongs with the robots and motor control boards and the ESP32 boards of this library.
README
README.mdmica
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.
it features:
- XIAO ESP32-S3 as the main flight controller
- Custom-designed flight controller PCB
- ExpressLRS (ELRS) for wireless control
- Custom 3D-printed frame
design
mica is designed around keeping the electronics and mechanical structure compact while still leaving enough space for the components required for flight.
the flight controller is built around the XIAO ESP32-S3, with the supporting electronics integrated onto a custom PCB. the frame was designed specifically around the PCB and drone hardware rather than using an off-the-shelf frame.
the 3d-printed structure keeps the drone lightweight while providing mounting points for the electronics and other components. the overall layout is kept symmetrical to help maintain the center of gravity and make the drone predictable during flight.
Schematics + PCB
Designed using KiCad.
| Schematic | PCB |
|---|---|
 |  |
CAD
final 3d mockup of the drone frame.
|  |
the frame is 3d printable and was designed specifically around mica's electronics and component layout.
BOM
the complete bill of materials is available in bom.csv.
Parts
29| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 100nF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C1, C2 |
| 2 | dialgorithm | dialgorithm:dialgorithm | dialgorithm, dialgorithm |
| 1 | 1N5819 | Diode_SMD:D_SMA_Handsoldering | D1 |
| 1 | 2.2k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R3 |
| 1 | 22k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R2 |
| 1 | 2N3906 | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | 3.3k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R1 |
| 1 | 3V3 | Connector_Wire:SolderWirePad_1x01_SMD_2x4mm | 3V3 |
| 1 | BZ1+ | Connector_Wire:SolderWirePad_1x01_SMD_2x4mm | BZ+ |
| 1 | BZ1- | Connector_Wire:SolderWirePad_1x01_SMD_2x4mm | BZ- |
| 1 | ELRS_5V | Connector_Wire:SolderWirePad_1x01_SMD_2x4mm | 5V |
| 1 | ELRS_GND | Connector_Wire:SolderWirePad_1x01_SMD_2x4mm | GND |
| 1 | ELRS_RX | Connector_Wire:SolderWirePad_1x01_SMD_2x4mm | RX |
| 1 | ELRS_TX | Connector_Wire:SolderWirePad_1x01_SMD_2x4mm | TX |
| 1 | ESC_5V | Connector_Wire:SolderWirePad_1x01_SMD_2x4mm | E5V |
| 1 | ESC_GND | Connector_Wire:SolderWirePad_1x01_SMD_2x4mm | EGND |
| 1 | ESC_M1 | Connector_Wire:SolderWirePad_1x01_SMD_2x4mm | TP3 |
| 1 | ESC_M2 | Connector_Wire:SolderWirePad_1x01_SMD_2x4mm | TP4 |
| 1 | ESC_M3 | Connector_Wire:SolderWirePad_1x01_SMD_2x4mm | TP5 |
| 1 | ESC_M4 | Connector_Wire:SolderWirePad_1x01_SMD_2x4mm | TP6 |
| 1 | I2C_SCL | Connector_Wire:SolderWirePad_1x01_SMD_2x4mm | SCL |
| 1 | I2C_SDA | Connector_Wire:SolderWirePad_1x01_SMD_2x4mm | SDA |
| 1 | J_IMU | Connector_PinSocket_2.54mm:PinSocket_1x10_P2.54mm_Vertical | J1 |
| 1 | Spare | Connector_Wire:SolderWirePad_1x01_SMD_2x4mm | SPARE |
| 1 | VBAT_ADC | Connector_Wire:SolderWirePad_1x01_SMD_2x4mm | ADC |
| 1 | VBAT_SENSE | Connector_Wire:SolderWirePad_1x01_SMD_2x4mm | SENSE |
| 1 | XIAO-ESP32-S3-SMD | Seeed_Studio_XIAO_Series:XIAO-ESP32-S3-SMD | U1 |
Questions
How big is the Mica PCB?
It measures 36.8 × 36.6 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Mica use?
29 parts. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Mica KiCad files?
From the dialgorithm/mica repository on GitHub, at the commit this page was made from: the board is KiCad/mica.kicad_pcb and its schematic KiCad/mica.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Mica design in my own project?
Its repository states no licence, so its author keeps all rights: ask dialgorithm before reusing the design.
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