BTM308-host bottom

KingJacker·BTM308-bluetooth-module-host·BTM308-host/BTM308-host-bottom/BTM308-host-bottom.kicad_pcb

BTM308-host bottom PCB layout, top view — open source board by KingJacker

About the BTM308-host bottom PCB

BTM308-host bottom is an open source PCB design by KingJacker, published on GitHub. It is a 4-layer board measuring 23 × 40 mm, with 36 components from 16 distinct parts.

Other key parts include the OPA1678 and PJ-320A. By type, the board carries 16 resistors, 13 capacitors, 4 connectors, 2 ICs and 1 diode.

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

From the project

This is a carrier board for the BTM308 Bluetooth audio module.

BTM308-host bottom, from the project README — From the project README

Main components on the BTM308-host bottom

OPA1678 PJ-320A

BTM308-host bottom bill of materials (BOM)

36 components, 16 distinct parts.

Qty	Part	Footprint	Refs
1	OPA1678	SOIC-8_5.3x5.3mm_P1.27mm	U2
1	PJ-320A	PJ-320A	U3
1	Bottom	PinHeader_2x05_P2.54mm_Vertical	J1
1	USB_C_Receptacle_USB2.0_16P	USB_C_Receptacle_HRO_TYPE-C-31-M-12	J2
1	Battery +	PinHeader_1x01_P2.54mm_Vertical	J3
1	Battery -	PinHeader_1x01_P2.54mm_Vertical	J4
1	SMAJ6.0A	D_SMA	D3
3	220uF	C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C1, C2, C11
3	22uF	C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C3, C5, C10
1	100nF	C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C4
4	1uF	C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C6, C7, C8, C9
2	10uf	C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C12, C13
10	10k	R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R6, R7, R8, R9, R10, R11, R12, R13 +2
2	0	R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R14, R21
2	5.1k	R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R17, R18
2	47	R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R19, R20

BTM308-host bottom design files

The KiCad project lives in the KingJacker/BTM308-bluetooth-module-host repository on GitHub; these links point at the commit this page was built from.

LayoutBTM308-host/BTM308-host-bottom/BTM308-host-bottom.kicad_pcb

BTM308-host bottom: common questions

How big is the BTM308-host bottom PCB?

The BTM308-host bottom measures 23 × 40 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the BTM308-host bottom?

36 components, from 16 distinct parts. The full bill of materials is listed on this page.

Where can I download the BTM308-host bottom design files?

From the KingJacker/BTM308-bluetooth-module-host repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the BTM308-host bottom design in my own project?

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

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