Nanoc6 mppt rs485 base

chinawrj·esphome-baijidian-mppt·hardware/nanoc6-mppt-rs485/rev-d/nanoc6_mppt_rs485_base.kicad_pcb

Nanoc6 mppt rs485 base PCB layout, top view — open source board by chinawrj

About the Nanoc6 mppt rs485 base PCB

Nanoc6 mppt rs485 base is an open source PCB design by chinawrj, published on GitHub under the MIT license. It is a 2-layer board measuring 62 × 28 mm, with 37 components from 26 distinct parts.

Other key parts include the C2071056, C5215918 and C5446. By type, the board carries 16 resistors, 8 capacitors, 5 diodes, 3 ICs, 2 connectors and 1 transistor.

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

From the project

ESPHome and Home Assistant integration for Baijidian MPPT controllers over Modbus RTU/RS485

Rev D 是一块 62 mm × 28 mm、双层、非隔离的紧凑底板。它使用 6P6C（RJ12）连接 MPPT，把 RS485 转为 NanoC6 使用的 3.3 V UART，并默认从 MPPT 端口给 NanoC6 供电。

- 正电源：J1-P2 → R2(0Ω，贴装)；备用 P1 的 R1 不贴。 - 0 V：J1-P5 → R4(0Ω，贴装)；备用 P3 的 R3 不贴。 - NanoC6 供电：R2 → F1 → Q1 → U1(5V DC/DC) → D4 → R10 → J2-3。 - RS485：P4=A、P6=B；JP2/JP3 默认保持直通，JP4 终端默认开路。 - R1/R2 或 R3/R4 禁止同时贴装；改候选路径前必须拆下原来的 0Ω。

默认选择 P2/P5 来自目标项目、同平台用户实测和同类控制器手册的交叉印证，但仍须在首件上电前测量用户手中 MPPT 的电压和极性。

Main components on the Nanoc6 mppt rs485 base

C2071056 C5215918 C5446

Nanoc6 mppt rs485 base bill of materials (BOM)

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

Qty	Part	Footprint	Refs
1	C2071056 AP63205WU-7 5V 2A	TSOT-23-6	U1
1	C5215918 THVD1406DR AUTO-DIR RS485	SOIC-8_3.9x4.9mm_P1.27mm	U2
1	C5446 XC6206P332MR-G 3V3 200mA / C5446	SOT-23	U3
1	C15127 AO3401A -30V	SOT-23	Q1
1	C2683355 KH-9801-6P6C / LCSC C2683355	Kinghelm_KH-9801-6P6C	J1
1	C2906053 NanoC6 DIRECT DOCK / C2906053	NanoC6_Dock_PM200-1-04-W-4.3	J2
1	C70077 0.50A HOLD - DEFAULT FIT	Fuse_1206_3216Metric	F1
2	C19077401 BZT52C5V1 5V1 SERIES VGS CLAMP / C19077401	D_SOD-123	D1, D5
1	C19077569 SMBJ15A 600W / C19077569	D_SMB	D2
1	C7420375 SM712 RS485 TVS / C7420375	SOT-23	D3
1	C8678 SS34 40V 3A ANTI-BACKFEED / C8678	D_SMA	D4
1	C602031 4.7uH 3.3A / C602031	FHD4020S-4R7MT	L1
3	C13585 10uF 50V X5R / C13585	C_1206_3216Metric	C1, C6, C7
1	C14663 100nF 50V	C_0603_1608Metric	C2
1	C14663 100nF BOOT	C_0603_1608Metric	C3
2	C12891 22uF 25V X5R / C12891	C_1206_3216Metric	C4, C5
1	C14663 100nF	C_0603_1608Metric	C8
1	DNP 0R P1_PWR_ALT	R_0603_1608Metric	R1
1	C21189 0R P2_PWR_DEFAULT	R_0603_1608Metric	R2
1	DNP 0R P3_RET_ALT	R_0603_1608Metric	R3

Show 6 more

Qty	Part	Footprint	Refs
1	C21189 0R P5_RET_DEFAULT	R_0603_1608Metric	R4
1	C25803 100k	R_0603_1608Metric	R5
1	C25804 10k TX IDLE HIGH	R_0603_1608Metric	R6
8	C22859 10R 1% / C22859	R_0603_1608Metric	R7, R8, R11, R12, R13, R14, R15, R16
1	C22787 120R TERM	R_0603_1608Metric	R9
1	C21189 0R DEFAULT FIT - MPPT POWER TO NANOC6	R_0603_1608Metric	R10

Nanoc6 mppt rs485 base design files

The KiCad project lives in the chinawrj/esphome-baijidian-mppt repository on GitHub; these links point at the commit this page was built from.

Nanoc6 mppt rs485 base: common questions

How big is the Nanoc6 mppt rs485 base PCB?

The Nanoc6 mppt rs485 base measures 62 × 28 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Nanoc6 mppt rs485 base?

37 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 Nanoc6 mppt rs485 base design files?

From the chinawrj/esphome-baijidian-mppt 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 Nanoc6 mppt rs485 base design in my own project?

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

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