HardLabs

Mimigotchu

WinnyT·mimigotchu·assets/pcb/mimigotchi.kicad_pcb

Mimigotchu PCB layout, top view — open source ESP32 board by WinnyT

About the Mimigotchu PCB

Mimigotchu is an open source ESP32 PCB design by WinnyT, published on GitHub under the MIT license. It is a 2-layer board measuring 35 × 83 mm, with 9 components from 7 distinct parts.

Its main chip is the XIAO-ESP32-C3-SMD, from the ESP32 family. Other key parts include the HS96L03W2C03 and L293D. By type, the board carries 3 ICs, 3 switches, 1 module and 1 battery holder.

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

From the project

Right Button: Short press - Start countdown Long press - Switch to pet screen

Right Button: Short press - Start countdown Long press - Switch to pet screen

Oled screen: Timer mode: showing countdown of the timer MM:SS Pet mode: showing hapiness and age

Download gebber file ### 3D view of the PCB

You can flash Mimigotchi without installing PlatformIO.

2. Connect your Mimigotchi via USB-C 3. Download bootloader.bin, partitions.bin, and firmware.bin from the release 4. Run (from the folder containing all three files): esptool.py --port /dev/tty.usbmodem writeflash

Mimigotchu, from the project README
From the project README

Main components on the Mimigotchu

XIAO-ESP32-C3-SMDHS96L03W2C03L293D

Mimigotchu bill of materials (BOM)

9 components, 7 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
XIAO-ESP32-C3-SMD
U1
1
HS96L03W2C03
HS(汉昇)
U2
1
L293D
ST(意法半导体)
U3
1
Motor_DC
M1
1
Battery_Cell
BT1
1
1207-P6.5MM
XHXDZ(兴华鑫)
BUZZER1
3
SW_Push
SW1, SW2, SW3

Mimigotchu design files

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

Mimigotchu: common questions

What microcontroller does the Mimigotchu use?

The Mimigotchu is built around the XIAO-ESP32-C3-SMD, from the ESP32 family.

How big is the Mimigotchu PCB?

The Mimigotchu measures 35 × 83 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Mimigotchu?

9 components, from 7 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 Mimigotchu design files?

From the WinnyT/mimigotchu 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 Mimigotchu design in my own project?

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

Can I test firmware for the Mimigotchu 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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