JLCPCB · parts and placement

Assembly & BOM

The bill of materials as a searchable board view — every part cross-referenced against its footprint, its LCSC number and where it sits on the PCB.

Updated 2026-08-26

The bill of materials that goes to assembly, cross-referenced against the board. Click a row to light up its parts; click a part to jump to its row. Filter by designator, value or LCSC number, and switch sides to see only what is placed on that face.

It is generated from Krio.kicad_pcb and the ordering BOM by docs/gen-bom.py — plain Python, no KiCad — so it regenerates on every documentation build, including in CI. Outlined parts are on the board but not fitted: do-not-populate and excluded footprints, which the BOM itself does not list.

60 lines · 221 fitted · 39 not fitted · 260 footprints

#	Value	Designators	Footprint	LCSC	Qty
1	C1uF	C1, C6, C9, C11, C24, C27, C34, C37, C46, C49, C59, C64, C77, C87, C90, C99, C102, C112, C117, C163, C164, C167, C168	C_0402_1005Metric	C14445	23
2	C100nF	C2, C3, C4, C8, C10, C12, C13, C14, C23, C25, C26, C28, C33, C36, C45, C48, C58, C63, C76, C86, C89, C98, C101, C111, C116, C129, C130, C131, C161, C162, C165, C166, C15, C16, C17, C18, C19, C20, C21, C22	C_0402_1005Metric	C1525	40
3	C47uF	C5, C7, C153, C154	C_1210_3225Metric	C77101	4
4	C10nF	C35, C38, C60, C88, C91, C113	C_0402_1005Metric	C15195	6
5	C10uF	C47, C50, C65, C100, C103, C118	C_0402_1005Metric	C15525	6
6	C10uF Vin	C132, C133, C136, C138, C157	C_1206_3216Metric	C9807	5
7	10uF	C134	C_1206_3216Metric	C9807	1
8	100nF	C135	C_0402_1005Metric	C1525	1
9	C1uF Vin	C137, C144	C_1206_3216Metric	C1848	2
10	C22uF	C140, C142, C143	C_1206_3216Metric	C5672	3
11	C47uF Vin	C141	C_1206_3216Metric	C76659	1
12	C47pF	C146, C155, C159	C_0402_1005Metric	C60137	3
13	C22nF	C147, C156, C160	C_0402_1005Metric	C77023	3
14	C4.7uF Vin	C148	C_1206_3216Metric	C1872	1
15	C1uF	C149, C150, C151, C152, C169, C170	C_1206_3216Metric	C1848	6
16	C100uF	C158	C_1206_3216Metric	C15008	1
17	Red	D1	LED_0603_1608Metric	C2286	1
18	Green	D2	LED_0603_1608Metric	C12624	1
19	Yellow	D3	LED_0603_1608Metric	C2287	1
20	Blue	D4	LED_0603_1608Metric	C2288	1
21	SMAJ16A	D5	D_SMA	C74561	1
22	LED	D6, D7, D8, D9, D10, D11	LED_0603_1608Metric	C2286	6
23	ADM6-60-01.5-L-4-2-A-TR	J1, J2	SAMTEC_ADM6-60-01.5-L-4-2-A-TR	C3649973	2
24	JXD0_2015NL	J5	JXD0-2015NL_PUL	C3178909	1
25	USB_B_Micro	J6	AMPHENOL_10118192-0002LF	C2972784	1
26	0878311420	J7	CONN14_878311420_MOL	C240854	1
27	Conn_01x06_2.54mm	J8	PinHeader_1x06_P2.54mm_Vertical	C37208	1
28	Fan 12V 2-pin	J9	PinHeader_1x02_P2.54mm_Vertical	C124375	1
29	R1.5k	R7	R_0402_1005Metric	C25867	1
30	R10k	R11, R61, R68, R73, R81, R82, R77, R78	R_0402_1005Metric	C25744	8
31	R2.49k	R12, R33, R44	R_0402_1005Metric	C25884	3
32	R499	R15, R17, R18	R_1206_3216Metric	C18016	3
33	R2.2k	R19, R20, R21, R22, R26, R28, R38, R49	R_0402_1005Metric	C25879	8
34	R200k	R23, R24, R29	R_0603_1608Metric	C25811	3
35	R470	R30, R31, R41, R42	R_0402_1005Metric	C25117	4
36	R5.76k	R32, R43	R_0402_1005Metric	C25910	2
37	R11k	R39, R50	R_0402_1005Metric	C25749	2
38	R4.7k	R40, R51	R_0402_1005Metric	C25900	2
39	R47k	R52	R_0402_1005Metric	C25792	1
40	R1k	R53, R54, R55, R56, R64, R66, R67, R71, R76, R80	R_0402_1005Metric	C11702	10
41	R100k	R57, R63, R70, R75, R79	R_0402_1005Metric	C25741	5
42	R124k	R58	R_0402_1005Metric	C36777	1
43	R73.2k	R59	R_0402_1005Metric	C26986	1
44	R162k	R62, R69, R74	R_0402_1005Metric	C54068	3
45	R20k	R65	R_0402_1005Metric	C25765	1
46	R45.3k	R72	R_0402_1005Metric	C26980	1
47	R51k	R83	R_0402_1005Metric	C25794	1
48	R10k	R84	R_0402_1005Metric	C60490	1
49	PCA9306	U1, U2, U3	VSSOP-8_2.3x2mm_P0.5mm	C33196	3
50	DMN26D0UT-7	U4, U5, U10, U11, U19, U20, U21, U22, U26, U29, U30, U32, U34, U36	DMN26D0UT-7_PER	C211407	14
51	TPD4E05U06DQAR	U6, U7, U12, U13, U16, U17	DQA0010A	C138714	6
52	ASDMB-25.000MHz	U8, U14	Oscillator_SMD_Abracon_ASDMB-4Pin_2.5x2.0mm	C2650748	2
53	DP83867CRRGZR	U9, U15	RGZ48_7P15X7P15_TEX	C544766	2
54	CH340N	U18	JEITA_SOIC-8_3.9x4.9mm_P1.27mm	C2977777	1
55	6 Pin PCIe Power	U23	CONN_SD-45558-001_MOL	C7545781	1
56	TPS259260DRCR	U24	VSON-10-1EP_3x3mm_P0.5mm_EP1.65x2.4mm	C469862	1
57	TPSM86637RCGR	U25, U31, U33	B3QFN19_RCG_TEX	C30064228	3
58	TLV75710PDBV	U27	SOT-23-5	C2865385	1
59	TLV75725PDBV	U28	SOT-23-5	C2872563	1
60	TLV75718PDBV	U35	SOT-23-5	C507270	1
—	Not fitted	C139, C145, J3, J4, JP1, JP2, JP3, R10, R13, R14, R16, R25, R27, R34, R35, R36, R37, R45, R46, R47, R48, R5, R6, R60, R8, R9, SP1, SP2, SP3, SP4, TP1, TP2, TP3, TP4, TP5, TP6, TP7, TP8, TP9	—	—	39

What is in it


Lines	60
Parts placed	221
Lines with an LCSC part number	60 of 60
Footprints on the board	260
Not fitted	39 — do-not-populate and excluded

Every line carries an LCSC part number, so nothing gets substituted silently at assembly. If a line ever appears without one, JLCPCB will try to match it by manufacturer part number or by value — worth catching before you place an order rather than afterwards.

Where the files come from

fab/generate_jlcpcb.sh produces the upload package, including the machine-readable BOM and the pick-and-place file:

File	Upload as
`Krio-BOM.csv`	Assembly BOM, LCSC part numbers
`Krio-CPL.csv`	Pick-and-place, mm, DNP excluded
`Krio-BOM.html`	The same BOM as a plain table, for review offline

The view above joins the board’s own geometry to that CSV, so a part that exists in one and not the other shows up rather than going quietly missing.

The BOM is built by fab/make_bom.py, which expands designator ranges and merges rows split by a missing LCSC field — both because JLCPCB’s uploader rejects the job otherwise. See fabrication for the order settings and the two specifications that push the board past the standard tier.