Selftest Board

FirstTestStation·Selftest_Board·selftest_bd/selftest_bd.kicad_pcb

About the Selftest Board

Selftest Board is an open source RP2040/RP2350 PCB design by FirstTestStation, published on GitHub under the CERN-OHL-W-2.0 license. It is a 4-layer board measuring 300 × 150 mm, with 88 components from 52 distinct parts.

Its main chip is the Pico, from the RP2040/RP2350 family. Other key parts include the ULN2003A and DS2431. By type, the board carries 36 test points, 17 relays, 16 resistors, 6 connectors, 5 ICs and 5 diodes.

From the project

KiCad PCB design utilized in the creation of the Selftest Board.

- Bill of Materials (BOM) – List of components required for assembly.

This section contains the materials and instructions required to assemble the Selftest Board.

This project is licensed under the terms of the CERN Open Hardware Licence Version 2 - Weakly Reciprocal (CERN-OHL-W 2.0).

See the LICENSE file in this repository for more details.

Selftest Board, from the project README — From the project README

Main components on the Selftest Board

Pico ULN2003A DS2431

Selftest Board bill of materials (BOM)

88 components, 52 distinct parts.

Qty	Part	Footprint	Refs
1	Pico	RPi_Pico_SMD_TH	U1
2	ULN2003A	DIP-16_W7.62mm_LongPads	U2, U3
2	DS2431	TO-92_Inline_Wide	U4, U5
2	9001-14961C00A	900114961C00A	J1, J2
1	RJ45	CUI_CRJ028-1H-TH	J3
1	USB-VERTICAL	ONSHORE_USB-A1VSB6	J4
2	8 x 2.54mm	PinSocket_1x08_P2.54mm_Vertical	J5, J6
17	TQ2-5_Split	Relay_DPDT_FRT5	K1, K2, K3, K4, K5, K6, K7, K8 +9
1	J_A2	TestPoint_THTPad_D1.5mm_Drill0.7mm	TP1
1	J_A8	TestPoint_THTPad_D1.5mm_Drill0.7mm	TP2
1	3V3_TESTPOINT	TestPoint_Loop_D2.54mm_Drill1.5mm_Beaded	TP3
1	J2_B27	TestPoint_THTPad_D1.5mm_Drill0.7mm	TP4
1	J_C3	TestPoint_THTPad_D1.5mm_Drill0.7mm	TP5
1	GND_TESTPOINT	TestPoint_Loop_D2.54mm_Drill1.5mm_Beaded	TP6
1	J_A5	TestPoint_THTPad_D1.5mm_Drill0.7mm	TP7
1	J2_C25	TestPoint_THTPad_D1.5mm_Drill0.7mm	TP8
1	J2_C30	TestPoint_THTPad_D1.5mm_Drill0.7mm	TP9
1	ST_SWDIO	TestPoint_THTPad_D1.5mm_Drill0.7mm	TP11
1	ST_SWGND	TestPoint_THTPad_D1.5mm_Drill0.7mm	TP12
1	ST_SWCLK	TestPoint_THTPad_D1.5mm_Drill0.7mm	TP13

Show 32 more

Qty	Part	Footprint	Refs
1	S2_VBUS	TestPoint_THTPad_D1.5mm_Drill0.7mm	TP14
1	ST_3V3EN	TestPoint_THTPad_D1.5mm_Drill0.7mm	TP15
1	ST_ADC_VREF	TestPoint_THTPad_D1.5mm_Drill0.7mm	TP17
1	ST_RUN	TestPoint_THTPad_D1.5mm_Drill0.7mm	TP18
1	IO_SPARE	TestPoint_THTPad_D1.5mm_Drill0.7mm	TP19
1	CML_6	TestPoint_THTPad_D1.5mm_Drill0.7mm	TP20
1	CML_7	TestPoint_THTPad_D1.5mm_Drill0.7mm	TP21
6	TestPoint_Small	TestPoint_THTPad_D1.5mm_Drill0.7mm	TP22, TP23, TP24, TP25, TP26, TP27
1	4BNC	TestPoint_THTPad_D1.5mm_Drill0.7mm	TP28
1	17AC	TestPoint_THTPad_D1.5mm_Drill0.7mm	TP31
1	17BC	TestPoint_THTPad_D1.5mm_Drill0.7mm	TP32
1	17ANC	TestPoint_THTPad_D1.5mm_Drill0.7mm	TP33
1	17AN0	TestPoint_THTPad_D1.5mm_Drill0.7mm	TP34
1	17BNC	TestPoint_THTPad_D1.5mm_Drill0.7mm	TP35
1	17BN0	TestPoint_THTPad_D1.5mm_Drill0.7mm	TP36
1	VCC_TESTPOINT	TestPoint_Loop_D2.54mm_Drill1.5mm_Beaded	TP37
1	DIG_PWR	TestPoint_Loop_D2.54mm_Drill1.5mm_Beaded	TP38
1	USBV	TestPoint_THTPad_D1.5mm_Drill0.7mm	TP39
1	USBG	TestPoint_THTPad_D1.5mm_Drill0.7mm	TP40
3	1N4148	D_DO-35_SOD27_P7.62mm_Horizontal	D1, D2, D3
2	LED	LED_D3.0mm	D4, D5
1	0.1uF	C_Disc_D6.0mm_W2.5mm_P5.00mm	C1
2	10uF	CP_Radial_Tantal_D4.5mm_P2.50mm	C2, C3
1	100	R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal	R1
2	10	R_Axial_DIN0617_L17.0mm_D6.0mm_P25.40mm_Horizontal	R2, R12
4	10K	R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal	R3, R4, R10, R11
2	4.7	R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal	R5, R7
1	10	R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal	R6
2	4.7K	R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal	R8, R9
2	N.A	R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal	R13, R14
1	470	R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal	R15
1	330	R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal	R16

Selftest Board design files

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

Layoutselftest_bd/selftest_bd.kicad_pcb
Schematicselftest_bd/selftest_bd.kicad_sch

Selftest Board: common questions

What microcontroller does the Selftest Board use?

The Selftest Board is built around the Pico, from the RP2040/RP2350 family.

How big is the Selftest Board?

The Selftest Board measures 300 × 150 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Selftest Board?

88 components, from 52 distinct parts. The full bill of materials is listed on this page.

Where can I download the Selftest Board design files?

From the FirstTestStation/Selftest_Board repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Selftest Board design in my own project?

Yes, under the terms of its CERN-OHL-W-2.0 license, which FirstTestStation chose for the repository.

Can I test firmware for the Selftest Board 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.