HardLabs

Next main Control

TOBA-Robocon·NHK_2025_circuit_public_var·Next_main_Control/Next_main_Control.kicad_pcb

Next main Control PCB layout, top view — open source ESP32 board by TOBA-Robocon

About the Next main Control PCB

Next main Control is an open source ESP32 PCB design by TOBA-Robocon, published on GitHub. It is a 2-layer board measuring 75.5 × 65 mm, with 50 components from 21 distinct parts.

Its main chip is the ESP32_DevkitC, from the ESP32 family. Other key parts include the STM32F405RGTx, CH340E, NJM7812, Regulator_5.0 and Regulator_3.3. By type, the board carries 23 capacitors, 8 resistors, 7 connectors, 6 ICs, 2 LEDs and 1 crystal.

From the project

鳥羽商船Aチームが2025年度のNHK高専ロボコンで使用した基板(公開用に多少編集済み)

付属のXT60に給電することで分岐先のUSB-Cの電源ラインに電源を供給できる。

電源を供給することで後述する「偽C610(C810)」を駆動させることができる。

本番で使った基板にはれな子のシルクが乗っているため、部内では「れな子」と呼ばれていた。

ESP32とF405RGTがついている。Dualshock4の値をESP32で受け取ってCANバスに流し散らかす。

Dualshock4の値を使って各機構の処理をし、4本のUSB-C_CANで各基板にデータを転送する。

CAN1、ロリコン2(XAコネクタ5pin)、リミットスイッチ2(XAコネクタ2pin)、電流センサ2、「GODDCMD」を刺すスロット*2,

CAN1、ロリコン1(XAコネクタ5pin)、リミットスイッチ1(PHコネクタ2pin)、電流センサ1、モータードライバ*1ch

Main components on the Next main Control

STM32F405RGTxCH340ENJM7812Regulator_5.0Regulator_3.3

Next main Control bill of materials (BOM)

50 components, 21 distinct parts.

QtyPartRefs
1
STM32F405RGTx
U1
1
CH340E
U2
1
NJM7812
U3
1
Regulator_5.0
U4
1
Regulator_3.3
U5
1
~
U6
1
16MHz
Y1
1
USB_B
J1
1
Conn_02x05_Odd_Even
J2
1
Conn_01x02_Pin
J3
4
UJ20-C-R-G-TH-3-P14
J4, J5, J6, J7
2
MCP2561-E-SN
BD41041FJ-C1, BD41041FJ-C2
1
RESET
SW1
2
SMLVN6RGB
LED1, LED2
15
0.1μ
C1, C2, C7, C8, C10, C11, C12, C13 +7
2
22p
C3, C4
2
2.2μF
C5, C6
2
470μ
C9, C23
2
10μ
C15, C18
1
10k
R1
Show 1 more
QtyPartRefs
7
1k
R2, R3, R4, R5, R6, R7, R13

Next main Control design files

The KiCad project lives in the TOBA-Robocon/NHK_2025_circuit_public_var repository on GitHub; these links point at the commit this page was built from.

Next main Control: common questions

What microcontroller does the Next main Control use?

The Next main Control is built around the ESP32_DevkitC, from the ESP32 family.

How big is the Next main Control PCB?

The Next main Control measures 75.5 × 65 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Next main Control?

50 components, from 21 distinct parts. The full bill of materials is listed on this page.

Where can I download the Next main Control design files?

From the TOBA-Robocon/NHK_2025_circuit_public_var repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Next main Control design in my own project?

The repository has no license, so all rights stay with TOBA-Robocon. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Next main Control 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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