Watson assistant

ibm-dev-incubator·watson-assistant

Watson assistant PCB layout, top view — open source board by ibm-dev-incubator

About the Watson assistant PCB

Watson assistant is an open source PCB design by ibm-dev-incubator, published on GitHub under the CERN-OHL-1.2 license. It is a 4-layer board measuring 65 × 56 mm, with 45 components from 25 distinct parts.

Other key parts include the WM8731, CAT24C32 and SN74AHCT125. By type, the board carries 15 capacitors, 11 resistors, 4 LEDs, 3 ICs, 3 transistors and 3 connectors.

It belongs with the audio designs in this gallery.

From the project

Watson Home Assistant Raspberry Pi Hat ======================================

Watson Home Assistant Raspberry Pi Hat ======================================

This project is a raspberry pi hat that includes an audio codec with an integrated microphone, speaker. The intent is to use this to leverage the Watson APIs to create a voice controlled home assistant. In addition to the speakers there are 4 addressable RGB LEDs that can be used for more user feedback.

Main components on the Watson assistant

WM8731 CAT24C32 SN74AHCT125

Watson assistant bill of materials (BOM)

45 components, 25 distinct parts.

Qty	Part	Footprint	Refs
1	WM8731	SSOP-28_5.3x10.2mm_Pitch0.65mm	U1
1	CAT24C32	SOIC-8_3.9x4.9mm_Pitch1.27mm	U2
1	SN74AHCT125	DIP-14_W7.62mm_LongPads	U3
1	DMG2305UX	SOT-23	Q1
1	DMMT5401	SOT-23-6	Q2
1	ELECTRET	9.7ELECTRET	Q3
1	40HAT	Socket_Strip_Straight_2x20	J3
1	CONN_02X02	Pin_Header_Straight_2x02	J6
1	CONN_01X02	Pin_Header_Straight_1x02	J9
4	3mm_Mounting_Hole	NPTH_3mm_ID	H1, H2, H3, H4
1	Speaker	TerminalBlock_Pheonix_PT-3.5mm_2pol	LS1
4	SK6812	WS2812B	LED1, LED2, LED3, LED4
1	10uH	L_0805_HandSoldering	L1
4	10uF	CP_Elec_5x4.5	C1, C2, C5, C6
5	0.1uF	C_0805_HandSoldering	C3, C4, C7, C8, C15
1	1uF	CP_Elec_5x4.5	C9
1	220pF	C_0805_HandSoldering	C10
4	.1uF	C_0805_HandSoldering	C11, C12, C13, C14
1	R2	R_0603_HandSoldering	R1
1	680	R_0603_HandSoldering	R2

Show 5 more

Qty	Part	Footprint	Refs
1	47k	R_0603_HandSoldering	R3
2	3.9K	R_0603_HandSoldering	R6, R8
3	DNP	R_0805_HandSoldering	R7, R9, R11
2	22	R_0603_HandSoldering	R23, R24
1	10K	R_0603_HandSoldering	R29

Watson assistant design files

The KiCad project lives in the ibm-dev-incubator/watson-assistant repository on GitHub; these links point at the commit this page was built from.

Layoutwatson-assistant.kicad_pcb

Watson assistant: common questions

How big is the Watson assistant PCB?

The Watson assistant measures 65 × 56 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Watson assistant?

45 components, from 25 distinct parts. The full bill of materials is listed on this page.

Where can I download the Watson assistant design files?

From the ibm-dev-incubator/watson-assistant repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Watson assistant design in my own project?

Yes, under the terms of its CERN-OHL-1.2 license, which ibm-dev-incubator chose for the repository.

Similar boards