MAIN V1.2

akihiro-kataoka·KiCad_Circuit-Board_data·2025前/MAIN/MAIN V1.2/MAIN V1.2.kicad_pcb

About the MAIN V1.2 PCB

MAIN V1.2 is an open source AVR/Arduino PCB design by akihiro-kataoka, published on GitHub. It is a 2-layer board measuring 100 × 115 mm, with 67 components from 20 distinct parts.

Its main chip is the Mega 2560 ProMini footprint, from the AVR/Arduino family. By type, the board carries 20 capacitors, 16 diodes, 11 resistors, 4 transistors, 1 IC and 1 buzzer.

Main components on the MAIN V1.2

Mega 2560 ProMini footprint

MAIN V1.2 bill of materials (BOM)

67 components, 20 distinct parts — part numbers from the project's BOM.

Qty	Part	Footprint	Refs
1	Mega 2560 ProMini footprint	ARDUINO_MEGA_2560_PRO	U1
4	BSS138	SOT-23	Q1, Q2, Q3, Q4
1	CONN_01X08_PIN Conn_01x08_Pin	BNO055	BNO55
1	Buzzer	Buzzer UDX01CLFPH	BZ1
2	Conn_01x09_Pin	PinSocket_1x09_P2.54mm_Vertical	Ball-D15.17.19.23.25.27.29.31, Ball-D32.34.36.38.40.42.44.46
2	Conn_01x04_Pin	JST_XH_B4B-XH-A_1x04_P2.50mm_Vertical	CAM1, CAM2
3	Conn_01x03_Pin	JST_XH_B3B-XH-A_1x03_P2.50mm_Vertical	Catch1, Catch2, 電源1
1	Conn_01x06_Pin	CON_522710679_MOL	LINE-A9.11.13,D22.24.26
1	Conn_01x08_Pin	CON_522710879_MOL	MOTOR-D2.3.4.5.6.7.8.9
2	SW_Push	SW_PUSH_6mm	TactSwitch1, TactSwitch3
1	SW_Push	SW_TL1100EF160Q	TactSwitch2
1	Conn_01x03_Pin	PinSocket_1x03_P2.54mm_Vertical	ToggleSwitch1
16	WS2812B	LED_WS2812B_PLCC4_5.0x5.0mm_P3.2mm	D1, D2, D3, D4, D5, D6, D7, D8 +8
1	100μF	CP_Radial_D5.0mm_P2.50mm	C1
1	47μF	CP_Radial_D5.0mm_P2.50mm	C2
1	0.1μF	CP_Radial_D5.0mm_P2.50mm	C3
17	0.1μF	C_0603_1608Metric_Pad1.08x0.95mm_HandSolder	C4, C5, C6, C7, C8, C9, C10, C11 +9
1	1kΩ	R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R1
2	3.3kΩ	R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R2, R3
8	10kΩ	R_0603_1608Metric	R4, R5, R6, R7, R8, R9, R10, R11

MAIN V1.2 design files

The KiCad project lives in the akihiro-kataoka/KiCad_Circuit-Board_data repository on GitHub; these links point at the commit this page was built from.

MAIN V1.2: common questions

What microcontroller does the MAIN V1.2 use?

The MAIN V1.2 is built around the Mega 2560 ProMini footprint, from the AVR/Arduino family.

How big is the MAIN V1.2 PCB?

The MAIN V1.2 measures 100 × 115 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the MAIN V1.2?

67 components, from 20 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 MAIN V1.2 design files?

From the akihiro-kataoka/KiCad_Circuit-Board_data 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 MAIN V1.2 design in my own project?

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

Can I test firmware for the MAIN V1.2 without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.