Ichnaea

brandonbraun653·Ichnaea·hw/ver2/IchnaeaV2/IchnaeaV2.kicad_pcb

About the Ichnaea PCB

Ichnaea is an open source RP2040/RP2350 PCB design by brandonbraun653, published on GitHub under the MIT license. It is a 4-layer board measuring 100 × 100 mm, with 340 components from 64 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the LTC7871, HIP2210, AP66200FVBW-13, 74HC4051PW and W25Q32JVZP. By type, the board carries 132 resistors, 111 capacitors, 34 transistors, 24 diodes, 15 ICs and 9 connectors.

It belongs with the power & battery designs in this gallery, and the repository also holds 1 earlier revision of it.

From the project

2KW Solar Charge Controller w/MPPT

Main components on the Ichnaea

LTC7871 HIP2210 AP66200FVBW-13 74HC4051PW W25Q32JVZP RP2040 LM1117MP-5.0 LM1117MP-3.3 INA180A4

Ichnaea bill of materials (BOM)

340 components, 64 distinct parts — part numbers from the project's BOM.

Qty	Part	Footprint	Refs
1	LTC7871	LQFP-64-1EP_10x10mm_P0.5mm_EP6.5x6.5mm	U1
6	HIP2210	TDFN-10-1EP_4x4mm_P0.8mm_EP2.6x3mm	U2, U3, U4, U5, U6, U7
1	AP66200FVBW-13	QFN-16-1EP_4x4mm_P0.65mm_EP2.5x2.5mm	U8
1	74HC4051PW	TSSOP-16_4.4x5mm_P0.65mm	U9
2	W25Q32JVZP	WSON-8-1EP_6x5mm_P1.27mm_EP3.4x4.3mm	U10, U14
1	RP2040	QFN-56-1EP_7x7mm_P0.4mm_EP3.2x3.2mm	U11
1	LM1117MP-5.0	SOT-223-3_TabPin2	U12
1	LM1117MP-3.3	SOT-223-3_TabPin2	U13
1	INA180A4	SOT-23-5	U15
9	BSS138	SOT-23	Q1, Q26, Q28, Q29, Q30, Q31, Q32, Q33 +1
24	MCAC80N10Y	TRANS_BSC076N06NS3-G	Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9 +16
1	BSS84	SOT-23	Q27
1	12MHz	Crystal_SMD_3225-4Pin_3.2x2.5mm	Y1
4	Screw_Terminal_01x09	CONN_74651195R_WRE	J1, J2, J3, J8
1	SWD Debug	JTAG_2x05_P1_27mm_Shrouded_SMD	J4
1	FanConnector	Molex_KK-254_AE-6410-04A_1x04_P2.54mm_Vertical	J5
1	Debug	PinHeader_1x03_P2.54mm_Vertical	J6
1	BMS_Serial	PinHeader_1x03_P2.54mm_Vertical	J7
1	USB_C_Plug_USB2.0	USB_C_Receptacle_GCT_USB4085	P1
2	90V-2KA 90V-2kA	Fuse_1812_4532Metric_Pad1.30x3.40mm_HandSolder	GD1, GD2

Show 44 more

Qty	Part	Footprint	Refs
1	Boot	SW_SPST_EVQP2	SW1
1	Reset	SW_SPST_EVQP2	SW2
2	10k-NTC	R_0402_1005Metric_Pad0.72x0.64mm_HandSolder	TH1, TH2
1	SB10100L	TO-277A	D1
6	ESD9B5.0ST5G	D_SOD-923	D2, D3, D19, D20, D21, D24
2	PMEG10010ELRX	D_SOD-123	D4, D10
2	C2296 Yellow LED	LED_0805_2012Metric	D5, D6
2	C2297 Green LED	LED_0805_2012Metric	D7, D8
9	ESD9B3.3ST5G	D_SOD-923	D9, D11, D12, D13, D14, D15, D16, D17 +1
1	SMAJ90A	D_SMA	D22
1	SMAJ60A	D_SMA	D23
6	4.7uH	Bournes_L_PQ2614BLA	L1, L2, L3, L4, L5, L6
1	22UH 22uH	L_Wuerth_HCI-1040	L7
1	1.5MH 1.5mH	L_Changjiang_FNR6045S	L8
24	10UF-25V 10uF-25V	C_0603_1608Metric	C1, C3, C6, C12, C18, C24, C30, C36 +16
40	10UF-100V 10uF-100v	C_1210_3225Metric_Pad1.33x2.70mm_HandSolder	C2, C4, C5, C7, C11, C13, C17, C19 +32
12	470NF 470nF	C_0603_1608Metric	C8, C10, C14, C16, C20, C22, C26, C28 +4
30	100NF 100nF	C_0603_1608Metric	C9, C15, C21, C23, C27, C29, C33, C39 +22
2	15PF 15pF	C_0603_1608Metric	C49, C52
3	47PF 47pF	C_0603_1608Metric	C67, C68, C77
5	1k	R_0603_1608Metric	R1, R48, R51, R85, R95
34	10k	R_0603_1608Metric	R2, R29, R36, R37, R38, R40, R43, R44 +26
15	100	R_0603_1608Metric	R3, R41, R42, R49, R83, R94, R97, R100 +7
12	0	R_0603_1608Metric	R4, R8, R12, R16, R20, R54, R56, R62 +4
6	47k	R_0603_1608Metric	R5, R9, R13, R17, R21, R25
6	6.2k-0.25w	R_1206_3216Metric_Pad1.30x1.75mm_HandSolder	R6, R10, R14, R18, R22, R26
12	6.2K 6.2k	R_0603_1608Metric	R7, R11, R15, R19, R23, R24, R27, R65 +4
1	22K 22k	R_0603_1608Metric	R28
1	30K 30k	R_0603_1608Metric	R30
4	470K 470k	R_0805_2012Metric	R31, R35, R78, R81
2	15K 15k	R_0603_1608Metric	R32, R82
2	787K 787k	R_0805_2012Metric	R33, R39
1	120K 120k	R_0805_2012Metric	R34
1	3k	R_0603_1608Metric	R47
2	68K 68k	R_0603_1608Metric	R52, R57
2	100K 100k	R_1206_3216Metric	R53, R55
1	510K 510k	R_0603_1608Metric	R58
1	7.5K 7.5k	R_0603_1608Metric	R59
13	100K 100k	R_0603_1608Metric	R60, R87, R88, R91, R93, R107, R108, R113 +5
1	27K 27k	R_0603_1608Metric	R79
3	5.1K 5.1k	R_0603_1608Metric	R90, R92, R131
2	22	R_0603_1608Metric	R98, R99
4	510	R_0603_1608Metric	R102, R103, R104, R105
1	0.2M 0.2m	Shunt_5930	R130

Ichnaea design files

The KiCad project lives in the brandonbraun653/Ichnaea repository on GitHub; these links point at the commit this page was built from.

Ichnaea: common questions

What microcontroller does the Ichnaea use?

The Ichnaea is built around the RP2040, from the RP2040/RP2350 family.

How big is the Ichnaea PCB?

The Ichnaea measures 100 × 100 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Ichnaea?

340 components, from 64 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 Ichnaea design files?

From the brandonbraun653/Ichnaea 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 Ichnaea design in my own project?

Yes, under the terms of its MIT license, which brandonbraun653 chose for the repository.

Can I test firmware for the Ichnaea without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.

Earlier revisions in the repo: IchnaeaV1