Fluxpad

sssata·fluxpad·ECAD/FluxpadKicad/Fluxpad.kicad_pcb

About the Fluxpad PCB

Fluxpad is an open source RP2040/RP2350 PCB design by sssata, published on GitHub under the GPL-3.0 license. It is a 4-layer board measuring 70 × 68 mm, with 68 components from 30 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the 74AHCT1G125, DRV5056Z3QDBZR, DRV5056A3QDBZx Lekker, W25Q128JVS and USBLC6-2SC6. By type, the board carries 25 capacitors, 16 resistors, 8 ICs, 8 diodes, 6 switches and 1 crystal.

It belongs with the keyboards designs in this gallery.

From the project

Analog keypad with hall effect switches and rapid trigger for osu!

The FLUXPAD is a keypad designed for osu! with 2 analog Wooting Lekker switches, 2 digital switches, and an encoder knob. The analog keys use hall effect sensors to determine how far the switch is pressed over its full travel range with 0.1mm resolution, providing lower latency, adjustable actuation points, and rapid trigger.

- Rapid Trigger - Adjustable press and release point - Adjustable press and release hysteresis - Encoder Knob - Per Key LED Lighting - Desktop application to configure everything about the fluxpad (Compatible with Windows 10 and 11 only for now)

Fluxpad, from the project README — From the project README

Main components on the Fluxpad

74AHCT1G125 DRV5056Z3QDBZR RP2040 DRV5056A3QDBZx Lekker W25Q128JVS USBLC6-2SC6 AMS1117-3.3

Fluxpad bill of materials (BOM)

68 components, 30 distinct parts — part numbers from the project's BOM.

Qty	Part	Footprint	Refs
1	74AHCT1G125	SOT-353_SC-70-5	U1
2	DRV5056Z3QDBZR DRV5056A3QDBZx Lekker Texas Instruments	SW_Cherry_MX_PCB_1.00u_hall_effect	U2, U3
1	RP2040	QFN-56-1EP_7x7mm_P0.4mm_EP3.2x3.2mm	U4
1	DRV5056A3QDBZx Lekker	SW_Cherry_MX_PCB_1.00u_hall_effect	U5
1	W25Q128JVS	SOIC-8_5.23x5.23mm_P1.27mm	U6
1	USBLC6-2SC6	SOT-23-6	U7
1	AMS1117-3.3	SOT-223-3_TabPin2	U8
1	Crystal_GND24	Crystal_SMD_3225-4Pin_3.2x2.5mm	Y1
1	USB_C_Receptacle_USB2.0	USB_C_Receptacle_HRO_TYPE-C-31-M-12	J1
3	Tooling Hole	JLC Tooling Hole	H6, H7, H8
2	SW_SPST	SW_Hotswap_Kailh_MX_no_pads	SW1, SW2
1	RESET	SPST SMD TS-1187A-B-A-B	SW4
1	BOOTSEL	SPST SMD TS-1187A-B-A-B	SW5
2	SW_SPST	Kailh Hot Swap Socket	SW6, SW7
4	B1931TW--20P000314U1930 WHITE LED Harvatek Corporation	1208 Counterpost LED	D1, D2, D3, D4
1	WHITE LED	1208 Counterpost LED	D5
3	WS2812B	LED_WS2812B_PLCC4_5.0x5.0mm_P3.2mm	D6, D7, D8
9	1uF	C_0402_1005Metric	C1, C2, C3, C4, C10, C22, C23, C24 +1
1	22uf	C_0805_2012Metric	C5
1	10uf	C_0603_1608Metric	C6

Show 10 more

Qty	Part	Footprint	Refs
10	100n	C_0402_1005Metric	C7, C8, C9, C11, C12, C13, C14, C15 +2
2	1u	C_0402_1005Metric	C17, C18
2	30p	C_0402_1005Metric	C20, C21
5	22 Any	R_0603_1608Metric	R1, R2, R3, R4, R15
1	560 Any	R_0603_1608Metric	R5
3	100	R_0603_1608Metric	R6, R14, R16
2	5.1k	R_0402_1005Metric	R7, R8
2	10k	R_0402_1005Metric	R9, R10
2	22	R_0402_1005Metric	R11, R12
1	1k	R_0402_1005Metric	R13

Fluxpad design files

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

Fluxpad: common questions

What microcontroller does the Fluxpad use?

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

How big is the Fluxpad PCB?

The Fluxpad measures 70 × 68 mm, has 4 copper layers and is 1 mm thick.

How many components are on the Fluxpad?

68 components, from 30 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 Fluxpad design files?

From the sssata/fluxpad 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 Fluxpad design in my own project?

Yes, under the terms of its GPL-3.0 license, which sssata chose for the repository.

Can I test firmware for the Fluxpad 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.