Badge

Las-Vejas·badge·src/EinkBadge.kicad_pcb

About the Badge PCB

Badge is an open source RP2040/RP2350 PCB design by Las-Vejas, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 73.5 × 47.5 mm, with 66 components from 27 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the ZD25WQ32CEIGR, USBLC6-2SC6, NCP1117-3.3_SOT223, FPC-05F-24PH20 and ST25DV04K-JFR6D3. By type, the board carries 28 capacitors, 15 resistors, 7 switches, 6 ICs, 5 diodes and 2 inductors.

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

From the project

An E-ink badge run by RP2040, with NFC capabilities.

VejasBadge is a compact wearable badge built around the Raspberry Pi RP2040 microcontroller. It features an E-ink display, NFC via the ST25DV04K, and is powered over USB-C with battery charging support.

It will be used to display info like my name, website and a photo of some sort. If the NFC coil works, I will add functionality, to choose the info transmitted by the NFC tag so you could share multiple website links. I would also like to use it as an ebook reader, but there may not be enough storage for that.

Badge, from the project README — From the project README

Main components on the Badge

ZD25WQ32CEIGR USBLC6-2SC6 NCP1117-3.3_SOT223 RP2040FPC-05F-24PH20ST25DV04K-JFR6D3

Badge bill of materials (BOM)

66 components, 27 distinct parts.

Qty	Part	Footprint	Refs
1	ZD25WQ32CEIGR	Winbond_USON-8-1EP_3x2mm_P0.5mm_EP0.2x1.6mm	U1
1	USBLC6-2SC6	SOT-23-6	U2
1	NCP1117-3.3_SOT223	SOT-223-3_TabPin2	U3
1	RP2040	QFN-56-1EP_7x7mm_P0.4mm_EP3.2x3.2mm	U4
1	FPC-05F-24PH20	TE_2-1734839-4_1x24-1MP_P0.5mm_Horizontal	U5
1	ST25DV04K-JFR6D3	ST_UFDFPN-12-1EP_3x3mm_P0.5mm_EP1.4x2.55mm	U6
1	Si1308EDL	SOT-323_SC-70	Q1
1	ABM8-272-T3	Crystal_SMD_3225-4Pin_3.2x2.5mm	Y1
1	USB_C_Receptacle_USB2.0_16P	USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal	J1
1	BOOT	SW_Push_SPST_NO_Alps_SKRK	SW1
1	RST	SW_Push_SPST_NO_Alps_SKRK	SW2
5	SKRKAEE020	SW_Push_SPST_NO_Alps_SKRK	SW3, SW4, SW5, SW6, SW7
3	MBR0530	D_SOD-123	D1, D2, D3
2	YLED0402W	LED_0402_1005Metric	D4, D5
1	68uH	L_0805_2012Metric	L1
1	NFC Antenna	eink_badge_nfc5	L2
12	100nf	C_0402_1005Metric	C1, C5, C6, C8, C9, C10, C11, C13 +4
2	15pf	C_0402_1005Metric	C2, C3
2	10uf	C_0402_1005Metric	C4, C7
2	4.7uf	C_0402_1005Metric	C12, C15

Show 7 more

Qty	Part	Footprint	Refs
9	1uf	C_0402_1005Metric	C14, C17, C18, C19, C20, C21, C22, C23 +1
1	33pF	C_0402_1005Metric	C28
2	5.1k	R_0402_1005Metric	R1, R2
4	1k	R_0402_1005Metric	R3, R5, R11, R15
6	10k	R_0402_1005Metric	R4, R6, R9, R12, R13, R14
2	27	R_0402_1005Metric	R7, R8
1	R_Small	R_0402_1005Metric	R10

Badge design files

The KiCad project lives in the Las-Vejas/badge repository on GitHub; these links point at the commit this page was built from.

Layoutsrc/EinkBadge.kicad_pcb
Schematicsrc/EinkBadge.kicad_sch

Badge: common questions

What microcontroller does the Badge use?

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

How big is the Badge PCB?

The Badge measures 73.5 × 47.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Badge?

66 components, from 27 distinct parts. The full bill of materials is listed on this page.

Where can I download the Badge design files?

From the Las-Vejas/badge repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Badge design in my own project?

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

Can I test firmware for the Badge 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.