Sirith pico

About the Sirith pico PCB

Sirith pico is an open source RP2040/RP2350 PCB design by winedarksea, published on GitHub under the CERN-OHL-W-2.0 license. It is a 4-layer board measuring 158.3 × 50 mm, with 272 components from 79 distinct parts.

Its main chip is the C2040, from the RP2040/RP2350 family. Other key parts include the CYPD3177-24LQXQ, C2655100, C779278, C2651516 and XIAO. By type, the board carries 102 resistors, 82 capacitors, 25 connectors, 21 diodes, 15 ICs and 10 transistors.

It belongs with the power & battery, robotics & motion and sensors designs in this gallery.

From the project

A rp2040 robotics board with high power power delivery

This board was designed to do something standard dev boards cannot do: provide high power (12V, 60W) output with a microcontroller and a powerful rechargeable battery. It was designed to power something like a Raspberry Pi Zero, manage an array of servos, contain basic sensor data, log data to an SD card, and send and switch high power off board.

As a number of the ICs on this board are rather expensive, there is also a fairly extensive focus on circuit protections for power sources and GPIO pins, with the aim of reducing the probability of damage to the board.

Sirith pico, from the project README — From the project README

Main components on the Sirith pico

C2040 CYPD3177-24LQXQ C2655100 C779278 C2651516 XIAO LIS3MDLTR C82317 C558427 C141553 C1020018 C138706 C9900037420

Sirith pico bill of materials (BOM)

272 components, 79 distinct parts — part numbers from the project's BOM.

Qty	Part	Footprint	Refs
1	C2040 RP2040_QFN56	QFN56_7MM_REDUCEDEPAD	IC1
1	CYPD3177-24LQXQ	QFN50P400X400X60-25N-D	IC2
1	C2655100 LSM6DSOXTR	PQFN50P250X300X86-14N	U1
1	C779278 BMP390L/BMPxxx	XDCR_BMP390L	U2
1	C2651516 PCF8523T	SOIC-8_3.9x4.9mm_P1.27mm	U3
1	XIAO	xiao	U4
1	LIS3MDLTR	LIS3MDLTR	U5
1	C82317 W25Q16JVS	SOIC-8_5.23x5.23mm_P1.27mm	U6
3	C558427 TPD4EUSB30	USON-10_2.5x1.0mm_P0.5mm	U7, U9, U13
1	C141553 TPH3R704PL	TRANS_TPHR8504PL,L1Q	U8
1	C1020018 MAX77960x06	MAX77961EFV06	U10
1	C138706 INA219BxD	SOIC-8_3.9x4.9mm_P1.27mm	U11
1	C9900037420 MPM54304-0002	MPM54304GMN-0002	U12
5	C400505 BSS138	SOT-23	Q1, Q3, Q5, Q9, Q10
5	C5242075 DMP3007SCG	Diodes_PowerDI3333-8	Q2, Q4, Q6, Q7, Q8
1	C32346 32.768 kHz	Crystal_SMD_3215-2Pin_3.2x1.5mm	Y1
1	C9002 12MHz X322512MSB4SI	Crystal_SMD_3225-4Pin_3.2x2.5mm_HandSoldering	Y2
7	header	PinHeader_1x01_P2.54mm_Vertical	J1, J2, J7, J8, J9, J10, J17
4	Conn_01x02_Female	PinHeader_1x02_P2.54mm_Vertical	J3, J4, J5, J14
1	Conn_01x11_Female	Molex_KK-254_AE-6410-11A_1x11_P2.54mm_Vertical	J6

Show 59 more

Qty	Part	Footprint	Refs
1	JST XH	JST_XH_B4B-XH-A_1x04_P2.50mm_Vertical	J11
1	C266610 Micro_SD_Card	microSD_HC_Molex_47219-2001	J12
1	Barrel_Jack	BarrelJack_GCT_DCJ200-10-A_Horizontal	J13
1	C165948 USB_C_Receptacle_USB2.0	USB_C_Receptacle_HRO_TYPE-C-31-M-12	J15
1	THM	PinHeader_1x02_P2.54mm_Vertical	J16
5	Terminal	TerminalBlock_Phoenix_MKDS-1,5-2-5.08_1x02_P5.08mm_Horizontal	J18, J19, J21, J23, J25
1	C98733 XT60-M	AMASS_XT60-M	J20
1	Conn_01x04_Female	PinHeader_1x04_P2.54mm_Vertical	J22
1	Terminal	PinHeader_1x02_P2.54mm_Vertical	J24
2	C160404 SM04B-SRSS-TB(LF)(SN)	JST_SH4	CONN1, CONN2
1	C2935468 Fuse Holder	Fuseholder_Blade_Mini_Keystone_3568	F1
3	Jumper_2_Open	SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm	JP1, JP2, JP6
1	SolderJumper_2_Open	R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	JP3
1	AVL_JP	SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm	JP4
2	HEADER-3X04	3X04	JP5, JP7
3	C2834949 SW_SPST	SW_Push_1P1T_NO_6x6mm_H9.5mm	SW1, SW2, SW3
1	C128955 CK PCM12SMTR	SW_SPDT_PCM12	SW4
3	C22452 D_Schottky	D_SMA	D1, D7, D17
3	C545375 Zener 3V3	D_MiniMELF	D2, D3, D4
6	C553393 PTVS22VS1UR	TVS_PTVS22VS1UR	D5, D9, D11, D13, D18, D19
1	LED_DNP	LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder	D6
1	DNP	TVS_PTVS22VS1UR	D8
2	C72043 LED_GREEN	LED_0603_1608Metric	D10, D12
1	DNP	D_SOD-128	D14
4	C72041 LED_BLUE	LED_0603_1608Metric	D15, D16, D20, D21
1	C149526 3.3 uH DR127-3R3-R	InductorSMMS1360	L1
26	C307331 100 nF 25V X7R	C_0402_1005Metric	C1, C2, C3, C4, C5, C6, C8, C9 +18
10	C15849 1 uF 50V X5R	C_0603_1608Metric	C7, C17, C18, C19, C27, C31, C33, C73 +2
1	C96446 10 uF 16V X7R	C_0603_1608Metric_Pad1.08x0.95mm_HandSolder	C23
3	C1562 33 pF 6V C0G	C_0402_1005Metric_Pad0.74x0.62mm_HandSolder	C25, C26, C52
12	C15195 10 nF 50V X7R	C_0402_1005Metric_Pad0.74x0.62mm_HandSolder	C28, C32, C34, C35, C44, C45, C53, C61 +4
2	C1530 220 pF 50V X7R	C_0402_1005Metric_Pad0.74x0.62mm_HandSolder	C29, C30
3	C403725 47 uF 25V X7R	C_1210_3225Metric	C36, C37, C38
4	C13585 10 uF 35V X7R	C_1206_3216Metric	C40, C41, C46, C49
2	C16772 220 nF 16V X7R	C_0402_1005Metric_Pad0.74x0.62mm_HandSolder	C42, C43
4	C19666 4.7 uF 16V X5R	C_0603_1608Metric_Pad1.08x0.95mm_HandSolder	C47, C48, C51, C78
1	C1622 47 nF 30V X7R	C_0603_1608Metric_Pad1.08x0.95mm_HandSolder	C50
3	DNP	CP_Radial_D10.0mm_P5.00mm	C54, C56, C58
1	DNP	C_0603_1608Metric	C55
10	C12891 22 uF 25V X7R	C_1210_3225Metric_Pad1.33x2.70mm_HandSolder	C63, C64, C66, C67, C68, C69, C71, C72 +2
21	C25744 10K	C_0402_1005Metric_Pad0.74x0.62mm_HandSolder	R1, R2, R3, R4, R5, R6, R16, R34 +13
10	C23138 330	R_0603_1608Metric	R7, R8, R9, R10, R11, R17, R20, R25 +2
6	C11702 1K	C_0402_1005Metric_Pad0.74x0.62mm_HandSolder	R12, R38, R46, R63, R64, R69
5	C25764 200K	C_0402_1005Metric_Pad0.74x0.62mm_HandSolder	R13, R40, R65, R67, R86
8	C25100 27R	C_0402_1005Metric_Pad0.74x0.62mm_HandSolder	R14, R15, R18, R19, R22, R30, R36, R37
8	C23162 4K7	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R21, R26, R33, R35, R58, R82, R98, R100
7	C25805 110K	C_0603_1608Metric	R23, R31, R32, R44, R60, R96, R99
6	C26083 1M	C_0402_1005Metric_Pad0.74x0.62mm_HandSolder	R24, R27, R39, R42, R43, R68
1	DNP	R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R41
4	C25077 10	C_0402_1005Metric_Pad0.74x0.62mm_HandSolder	R47, R51, R70, R71
2	C500740 0.01 Ω 3W	R_2512_6332Metric	R48, R53
2	C226354 226K	C_0402_1005Metric_Pad0.74x0.62mm_HandSolder	R54, R55
5	C77605 17k8	C_0402_1005Metric_Pad0.74x0.62mm_HandSolder	R56, R66, R73, R89, R97
1	C23164 4.7	C_0603_1608Metric	R61
6	C2684545 8660	C_0402_1005Metric_Pad0.74x0.62mm_HandSolder	R62, R75, R77, R83, R84, R85
3	C346633 1180	R_0402_1005Metric_Pad0.72x0.64mm_HandSolder	R76, R78, R80
3	C17888 0R	R_1206_3216Metric	R87, R91, R94
2	DNP	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R90, R95
2	DNP	R_0402_1005Metric_Pad0.72x0.64mm_HandSolder	R101, R102

Sirith pico design files

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

Sirith pico: common questions

What microcontroller does the Sirith pico use?

The Sirith pico is built around the C2040, from the RP2040/RP2350 family.

How big is the Sirith pico PCB?

The Sirith pico measures 158.3 × 50 mm, has 4 copper layers and is 1.6762 mm thick.

How many components are on the Sirith pico?

272 components, from 79 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 Sirith pico design files?

From the winedarksea/sirith_pico 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 Sirith pico design in my own project?

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

Can I test firmware for the Sirith pico 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.