River

HenryLi-0·river·pcb/board/board.kicad_pcb

About the River PCB

River is an open source RP2040/RP2350 PCB design by HenryLi-0, published on GitHub under the CERN-OHL-S-2.0 license. It is a 2-layer board measuring 56 × 80 mm, with 118 components from 35 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the NCP1117-3.3_SOT223, W25Q16JVZPIQ TR, PCM5101A, TLV70033_SOT23-5 and TPA6132A2RTE. By type, the board carries 52 capacitors, 26 resistors, 13 diodes, 10 connectors, 9 ICs and 6 switches.

It belongs with the audio and displays & leds designs in this gallery.

From the project

a quick stepping stone

A couple of months ago, after listening to archived music on the Internet Archive with Webamp, I thought the graphics on the right side (powered by Milkdrop) were pretty cool. I've always liked how Geometry Dash levels typically have well synced gameplay, since it's just so satisfying. Additionally, I also dislike how everything is switching to streamsing services (both because of the subscription model and more importantly the amount of cellular data it uses lol), so I basically wanted to bring music-synced graphics onto a portable offline device!

River, from the project README — From the project README

Main components on the River

RP2040 NCP1117-3.3_SOT223 W25Q16JVZPIQ TR PCM5101A TLV70033_SOT23-5 TPA6132A2RTE

River bill of materials (BOM)

118 components, 35 distinct parts — part numbers from the project's BOM.

Qty	Part	Footprint	Refs
2	RP2040	QFN-56-1EP_7x7mm_P0.4mm_EP3.2x3.2mm	U1, U5
2	NCP1117-3.3_SOT223	SOT-223-3_TabPin2	U2, U4
2	W25Q16JVZPIQ TR	Winbond_USON-8-1EP_3x2mm_P0.5mm_EP0.2x1.6mm	U3, U6
1	PCM5101A	TSSOP-20_4.4x6.5mm_P0.65mm	U7
1	TLV70033_SOT23-5	SOT-23-5	U8
1	TPA6132A2RTE	WQFN-16-1EP_3x3mm_P0.5mm_EP1.6x1.6mm_ThermalVias	U9
2	12MHZ 12MHz	Crystal_SMD_3225-4Pin_3.2x2.5mm	Y1, Y2
1	(A) USB_C_Receptacle_USB2.0_14P	USB_C_Receptacle_HRO_TYPE-C-31-M-12	J1
1	(B) USB_C_Receptacle_USB2.0_14P	USB_C_Receptacle_HRO_TYPE-C-31-M-12	J2
1	(C) USB_C_Receptacle_USB2.0_14P	USB_C_Receptacle_HRO_TYPE-C-31-M-12	J3
3	CONN_01X01 Conn_01x01	PinHeader_1x01_P2.54mm_Vertical	J8, J15, J16
1	OLED_128X32 OLED_128x32	OLED_128x32	J10
1	LCD_128X160 LCD_128x160	LCD_128x160	J11
1	AUDIOJACK3 AudioJack3	Jack_3.5mm_CUI_SJ-3523-SMT_Horizontal	J12
1	Micro_SD_Card	microSD_HC_Molex_47219-2001	J14
2	SW_Push	SW_Push_SPST_NO_Alps_SKRK	SW1, SW2
3	Switch	SW_Cherry_MX_1.00u_PCB	SW3, SW4, SW5
1	RotaryEncoder_Switch	RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm	SW6
2	SS14	D_SMA	D1, D2
5	LED	LED_0603_1608Metric	D3, D4, D5, D9, D10

Show 15 more

Qty	Part	Footprint	Refs
6	LED_WS2812B	LED_WS2812B	D11, D12, D13, D14, D15, D16
10	1UF 1uF	C_0402_1005Metric	C1, C10, C20, C25, C45, C46, C47, C49 +2
22	0.1UF 0.1uF	C_0402_1005Metric	C2, C3, C4, C5, C6, C7, C8, C9 +14
4	10UF 10uF	C_0603_1608Metric	C13, C14, C18, C19
4	33PF 33pF	C_0402_1005Metric	C15, C16, C21, C22
4	10UF 10uF	C_0402_1005Metric	C35, C37, C39, C48
4	100NF 100nF	C_0402_1005Metric	C36, C38, C40, C43
4	2.2UF 2.2uF	C_0402_1005Metric	C41, C42, C44, C52
6	5.1K	R_0402_1005Metric	R1, R2, R8, R9, R10, R11
4	27	R_0402_1005Metric	R3, R4, R12, R13
4	1K	R_0402_1005Metric	R5, R6, R14, R16
2	10K	R_0402_1005Metric	R7, R15
7	330	R_0402_1005Metric	R17, R18, R22, R23, R24, R25, R26
2	470	R_0402_1005Metric	R19, R20
1	DNF	R_0402_1005Metric	R21

River design files

The KiCad project lives in the HenryLi-0/river repository on GitHub; these links point at the commit this page was built from.

River: common questions

What microcontroller does the River use?

The River is built around the RP2040, from the RP2040/RP2350 family.

How big is the River PCB?

The River measures 56 × 80 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the River?

118 components, from 35 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 River design files?

From the HenryLi-0/river 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 River design in my own project?

Yes, under the terms of its CERN-OHL-S-2.0 license, which HenryLi-0 chose for the repository.

Can I test firmware for the River 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.