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2 layers71.9 × 37.9 mmMicrobot, the printed circuit board in 3D

My first fully custom project inspired by the microbots from the movie Big Hero 6. My goal is to get into swarm robotics and I believe this is a HUGE leap in that direction, but a good moment to learn.

Size
71.9 × 37.9 mm
Copper layers
2
Thickness
1.6 mm
Parts
59
Nets
61
Pads
291
Tracks, vias
379, 22
Routed
Yes
KiCad
KiCad 9.0 (file 20241229)
Created
29 Dec 2025
Updated
31 Mar 2026

Overview

Microbot is an open-source printed circuit board by Rishabh416, from the Rishabh416/microbot repository on GitHub. It is a 2-layer board of 71.9 × 37.9 mm with 59 parts on 61 nets, routed with 379 tracks and 22 vias.

It is built around the ESP32-C3-WROOM-02-H4, DRV8837DSG and TPS63001DRC, with the BNO085, DW01A and 1N5819WS among its other parts. Its parts include 10 ICs, 9 capacitors, 8 resistors, 2 diodes and 1 transistor. It belongs with the ESP32 and RISC-V boards of this library.

Main components

7

README

README.md

Microbot

My first fully custom project inspired by the microbots from the movie Big Hero 6. My goal is to get into swarm robotics and I believe this is a HUGE leap in that direction, but a good moment to learn. I made this project to learn about swarm robotics and the potential application in environmental applications such as in deserts.

PCB.png 3DCase.png 3DCase2.png

Part NumberJLC Part NumberDescriptionManufacturerPackageURL
STM32F103C8T6C8734STM32 MCUSTMicroelectronicsLQFP-48(7x7)Link
N/AN/AElectromagnet
N/AServo Motor
N/ADC Motor
ICM-42688-P(TOKMAS)C54308212IMUTokmasLGA-14(2.5x3)Link
NRF24L01P-RC8791NRF24Nordic SemiconQFN-20-EP(4x4)Link
KH-204065-DZC530676Pogo MaleShenzhen Kinghelm ElecSMD, D=2mmLink
BWCD-L4.5W2.0H2.3C2826546Pogo FemaleBAT WIRELESSSMD, D=2mmLink
N/ALiPo Battery
MCP73831-2ATI/MCC635036BMSMicrochip TechDFN-8-EP(2x3)Link
XC6220B331MR-GC86534Voltage RegulatorTorex SemiconSOT-25Link
DRV8837CDSGRC191000Motor DriverTexas InstrumentsWSON-8-EP(2x2)Link
2450AT18A100EC89334AntennaJohanson Dielectrics1206Link
16M 12PF 10PPMC297535916MHz CrystalSSTHC-49S-SMD-2P-MiniLink
SSM3J338R,LFC146352MOSFETTOSHIBASOT-23FLink
Capacitors0603
HVRTB-3433EPXC5246356Green LEDHONGLITRONICSMD-6P, 3.4x3.3mmLink
DiodesD_SOD-323
TJ-S0704EX4T5ALC2R-A5C48689442Red LEDTOGIALED0201Link
918-118A2021Y40002C399939USB CJing ExtensionSMDLink
B2B-PH-K-S-GWC5251182Conn_01x02JST插件, P=2mmLink
2.54-1*3P针C49257Conn_01x03_PinBOOMELE插件, P=2.54mmLink
2.54-1*4C5116483Conn_01x04_PinZHOURI插件, P=2.54mmLink
Inductors0603
Resistors0603

Parts

59
QtyValueFootprintReferences
18TestPointTestPoint:TestPoint_Pad_1.0x1.0mmTP1, TP2, TP3, TP4, TP5, TP6, TP7, TP10, TP11, TP12, TP13, TP14, TP15, TP16, TP17, TP18 +2
8VAL**mousebite:mouse-bite-1mm-3mmmouse-bite-1mm-3mm, mouse-bite-1mm-3mm, mouse-bite-1mm-3mm, mouse-bite-1mm-3mm, mouse-bite-1mm-3mm, mouse-bite-1mm-3mm, mouse-bite-1mm-3mm, mouse-bite-1mm-3mm
5DRV8837Package_SON:WSON-8-1EP_2x2mm_P0.5mm_EP0.9x1.6mmU2, U3, U4, U5, U6
410uFCapacitor_SMD:C_0603_1608MetricC1, C2, C4, C5
2100nFCapacitor_SMD:C_0603_1608MetricC3, C6
22kResistor_SMD:R_0603_1608MetricR5, R8
24.7uFCapacitor_SMD:C_0603_1608MetricC7, C9
2470Resistor_SMD:R_0603_1608MetricR6, R7
25k1Resistor_SMD:R_0603_1608MetricR1, R2
10.1uFCapacitor_SMD:C_0603_1608MetricC8
1100Resistor_SMD:R_0603_1608MetricR4
110kResistor_SMD:R_0603_1608MetricR3
11N5819WSDiode_SMD:D_SOD-323D1
12.2uHInductor_SMD:L_0603_1608MetricL1
1BNO085BNO085:IC_BNO085U8
1Battery_CellConnector_JST:JST_EH_S2B-EH_1x02_P2.50mm_HorizontalBT1
1DW01APackage_TO_SOT_SMD:SOT-23-6U9
1ESP32-C3-WROOM-02RF_Module:ESP32-C3-WROOM-02U1
1FS8205FS8205:SOT95P280X145-6NQ1
1LEDLED_SMD:LED_0603_1608MetricD2
1MCP73831-2-OTPackage_TO_SOT_SMD:SOT-23-5U7
1TPS63001Package_SON:Texas_DRC0010J_ThermalViasU10
1USB_C_Receptacle_USB2.0_14PConnector_USB:USB_C_Receptacle_G-Switch_GT-USB-7051xJ1

Questions

How big is the Microbot PCB?

It measures 71.9 × 37.9 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Microbot use?

59 parts, built around the ESP32-C3-WROOM-02-H4, DRV8837DSG, TPS63001DRC and BNO085. 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 Microbot KiCad files?

From the Rishabh416/microbot repository on GitHub, at the commit this page was made from: the board is microbot PCB/microbot.kicad_pcb and its schematic microbot PCB V2/MicroBot.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Microbot design in my own project?

Its repository states no licence, so its author keeps all rights: ask Rishabh416 before reusing the design.

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