HardLabs

MiniBot

DDeGonge·MiniBot·pcbs/MiniBot_MainBoard/MiniBot.kicad_pcb

MiniBot PCB layout, top view — open source ESP32 board by DDeGonge

About the MiniBot PCB

MiniBot is an open source ESP32 PCB design by DDeGonge, published on GitHub under the MIT license. It is a 4-layer board measuring 21.2 × 28 mm, with 58 components from 26 distinct parts.

Its main chip is the ESP32-C3-MINI-1-H4X, from the ESP32 family. Other key parts include the MMC5633NJL, MIC23050-SYML-TR, MCP73832-2-OT and STSPIN220. By type, the board carries 23 resistors, 19 capacitors, 6 ICs, 3 connectors, 3 switches and 2 jumpers.

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

From the project

Super cheap super tiny bots for....playing chess...

A swarm robotics platform built around autonomous chess. The system runs 34 small differential-drive robots across an 8x8 board, each independently localized and coordinated by a central Python application running on a Raspberry Pi.

The design is general-purpose — chess is the primary use case, but the platform works for any scenario requiring coordinated movement of many small autonomous robots in a bounded space.

Main components on the MiniBot

MMC5633NJLMIC23050-SYML-TRESP32-C3-MINI-1-H4XMCP73832-2-OTSTSPIN220

MiniBot bill of materials (BOM)

58 components, 26 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
MMC5633NJL
Memsic Inc.
IC1
1
MIC23050-SYML-TR
Microchip Technology
IC2
1
ESP32-C3-MINI-1-H4X
Espressif Systems
U1
1
MCP73832-2-OT
Microchip Technology
U3
2
STSPIN220
STMicroelectronics
U4, U5
1
530470810
Conn_01x08
Molex
J1
1
S2B-PH-K-S
Conn_01x02
JST
J2
1
GSB1C41110SSHR
Amphenol Canada
J3
2
Jumper_3_Bridged12
JP1, JP2
1
PCM12SMTR
C&K
S1
2
EVP-AWBD4A
Panasonic
S2, S3
1
EASV2010RWA0
Everlight Electronics Co Ltd
LED1
1
MLZ2012N1R0LT000
L
TKD
L1
3
GRM155R60J475ME47D
4.7uF
Murata Electronics
C1, C8, C10
10
GRM155R71C104KA88J
0.1uF
Murata Electronics
C2, C4, C5, C6, C9, C15, C16, C19 +2
1
GCM155C71A105KE38D
1uF
Murata Electronics
C3
1
GRM1555C1H561JA01D
560pF
Murata Electronics
C7
2
GRM155R60J106ME05J
10uF
Murata Electronics
C17, C21
2
GRM155R71C223KA01D
22nF
Murata Electronics
C18, C22
4
RC0402FR-135K1L
5.1k
YAGEO
R1, R2, R14, R15
Show 6 more
QtyPartRefs
6
RC0402FR-0710KL
10k
YAGEO
R3, R4, R5, R6, R9, R12
3
RC0402FR-07390KL
390k
YAGEO
R7, R10, R11
1
RC0402FR-0712K4L
12.4k
YAGEO
R8
3
RC0402FR-071KL
1k
YAGEO
R13, R16, R20
4
AC0402FR-7W1RL
1
YAGEO
R18, R19, R22, R23
2
RC0402FR-0747KL
47k
YAGEO
R24, R25

MiniBot design files

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

MiniBot: common questions

What microcontroller does the MiniBot use?

The MiniBot is built around the ESP32-C3-MINI-1-H4X, from the ESP32 family.

How big is the MiniBot PCB?

The MiniBot measures 21.2 × 28 mm, has 4 copper layers and is 0.8 mm thick.

How many components are on the MiniBot?

58 components, from 26 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 MiniBot design files?

From the DDeGonge/MiniBot 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 MiniBot design in my own project?

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

Can I test firmware for the MiniBot 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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