HardLabs

Sotacat

invertedlabs·sotacat-pcb·sotacat/sotacat.kicad_pcb

Sotacat PCB layout, top view — open source ESP32 board by invertedlabs

About the Sotacat PCB

Sotacat is an open source ESP32 PCB design by invertedlabs, published on GitHub under the MIT license. It is a 2-layer board measuring 20 × 39 mm, with 33 components from 22 distinct parts.

Its main chip is the MOUDLE-SEEEDUINO-XIAO-ESP32C3, from the ESP32 family. Other key parts include the MAX17260xxTD. By type, the board carries 17 resistors, 6 capacitors, 3 connectors, 2 ICs, 2 diodes and 1 transistor.

It belongs with the iot & wireless and power & battery designs in this gallery.

From the project

SOTAcat PCB

This project creates a SOTAcat PCB designed in KiCad and compatible with Brian AB6D's SOTAcat and SOTAMAT ("SOTA-Mate") web service and software. Brian provides a cloud service and iOS and Android which can interface with SOTAcat hardware to command an Elecraft KX2 or KX3 to transmit SOTA or POTA spots from the field via the FT8 spotting networks. The SOTAcat software by Brian and Jeff KC6X also has other great features like a web interface that polls SOTA and POTA spots from their respective databases and commands the KX2 or KX3 to the spot frequency and mode with a single click.

Main components on the Sotacat

MOUDLE-SEEEDUINO-XIAO-ESP32C3MAX17260xxTD

Sotacat bill of materials (BOM)

33 components, 22 distinct parts.

QtyPartRefs
1
MOUDLE-SEEEDUINO-XIAO-ESP32C3
Seeed
U1
1
MAX17260xxTD
U3
1
MBT3904DW1
Q1
1
54-00035
J1
1
JST-SH
JST
J2
1
PicoBlade
Molex
J3
1
SW_SPDT
C&K
SW1
1
10k NTC
TH1
1
AMBER
Würth Elektronik
D1
1
BLUE
Würth Elektronik
D2
1
22uF
C1
2
0.1uF
KYOCERA AVX
C2, C3
1
0.47uF
TAIYO YUDEN
C4
2
30pF
C5, C6
3
200k
YAGEO
R1, R2, R8
4
10k
YAGEO
R3, R5, R11, R12
4
4.7k
YAGEO
R4, R13, R14, R15
2
130
YAGEO
R6, R17
1
10
YAEGO
R7
1
100k
YAGEO
R9
Show 2 more
QtyPartRefs
1
0
YAEGO
R10
1
10m
YAGEO
R16

Sotacat design files

The KiCad project lives in the invertedlabs/sotacat-pcb repository on GitHub; these links point at the commit this page was built from.

Sotacat: common questions

What microcontroller does the Sotacat use?

The Sotacat is built around the MOUDLE-SEEEDUINO-XIAO-ESP32C3, from the ESP32 family.

How big is the Sotacat PCB?

The Sotacat measures 20 × 39 mm, has 2 copper layers and is 1.600198 mm thick.

How many components are on the Sotacat?

33 components, from 22 distinct parts. The full bill of materials is listed on this page.

Where can I download the Sotacat design files?

From the invertedlabs/sotacat-pcb repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Sotacat design in my own project?

Yes, under the terms of its MIT license, which invertedlabs chose for the repository.

Can I test firmware for the Sotacat 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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