HardLabs

Kicad automation

Polymath-AS·kicad_automation·esp32_sensor_board/esp32_sensor_board.kicad_pcb

Kicad automation PCB layout, top view — open source ESP32 board by Polymath-AS

About the Kicad automation PCB

Kicad automation is an open source ESP32 PCB design by Polymath-AS, published on GitHub under the MIT license. It is a 2-layer board measuring 70 × 50 mm, with 34 components from 34 distinct parts.

Its main chip is the ESP32-WROOM-32, from the ESP32 family. Other key parts include the CH340C USB-UART, AP2112K-3.3, TMP102, USBLC6-2SC6 and 74AHCT1G125. By type, the board carries 14 resistors, 9 capacitors, 6 ICs, 2 transistors, 1 connector and 1 fuse.

It belongs with the sensors designs in this gallery.

From the project

Dockerized kicad and mcp tools with autorouter capability and skillset for using the tools.

This repository provides a reproducible Docker runtime for agent-driven KiCad work:

After cloning, start the KiCad container and Codex together:

The first run builds the Docker image, waits for the MCP endpoint, and then opens Codex. No token setup is required. Docker Desktop must be installed and running.

Running plain codex is also safe: the KiCad MCP server is optional during Codex startup, so an unavailable container no longer prevents the session from opening. Start the container and open a new Codex session when you need KiCad tools.

Main components on the Kicad automation

ESP32-WROOM-32CH340C USB-UARTAP2112K-3.3TMP102USBLC6-2SC674AHCT1G125

Kicad automation bill of materials (BOM)

34 components, 34 distinct parts.

QtyPartRefs
1
ESP32-WROOM-32
U1
1
CH340C USB-UART
U2
1
AP2112K-3.3
U3
1
TMP102
U4
1
USBLC6-2SC6
U5
1
74AHCT1G125
U6
1
MMBT3904 (BOOT)
Q1
1
MMBT3904 (RESET)
Q2
1
USB-C USB2.0
J1
1
500mA resettable fuse
F1
1
WS2812B addressable RGB
D1
1
10uF USB bulk
C1
1
1uF LDO input
C2
1
10uF 3V3 bulk
C3
1
100nF ESP32
C4
1
100nF CH340 V3
C5
1
100nF TMP102
C6
1
100nF AHCT
C7
1
100nF EN delay
C8
1
10uF LED bulk
C9
Show 14 more
QtyPartRefs
1
5.1k CC1
R1
1
5.1k CC2
R2
1
22R USB D+
R3
1
22R USB D-
R4
1
10k EN pull-up
R5
1
10k IO0 pull-up
R6
1
10k DTR base
R7
1
10k RTS base
R8
1
100k BOOT base pulldown
R9
1
100k RESET base pulldown
R10
1
4.7k SDA pull-up
R11
1
4.7k SCL pull-up
R12
1
330R LED data
R13
1
10k ALERT pull-up
R14

Kicad automation design files

The KiCad project lives in the Polymath-AS/kicad_automation repository on GitHub; these links point at the commit this page was built from.

Kicad automation: common questions

What microcontroller does the Kicad automation use?

The Kicad automation is built around the ESP32-WROOM-32, from the ESP32 family.

How big is the Kicad automation PCB?

The Kicad automation measures 70 × 50 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Kicad automation?

34 components, from 34 distinct parts. The full bill of materials is listed on this page.

Where can I download the Kicad automation design files?

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

Can I use the Kicad automation design in my own project?

Yes, under the terms of its MIT license, which Polymath-AS chose for the repository.

Can I test firmware for the Kicad automation 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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