Cybdokey

Cybdo·cybdokey·pcb/cybdokey.kicad_pcb

About the Cybdokey PCB

Cybdokey is an open source RP2040/RP2350 PCB design by Cybdo, published on GitHub. It is a 2-layer board measuring 12 × 46 mm, with 34 components from 17 distinct parts.

Its main chip is the RP2354_60QFN, from the RP2040/RP2350 family. Other key parts include the MCP1700x-300xxTT and USBLC6-2P6. By type, the board carries 17 capacitors, 9 resistors, 3 ICs, 2 diodes, 1 crystal and 1 connector.

It belongs with the dev boards & breakouts designs in this gallery.

From the project

rp2354 based usb hardware authentication key

Cybdokey was made because yubikeys are too expensive and all the other options, including picofido on other devboards, were clunky. the user interaction button was tiny and hard to press, and depending on the board it was too big and/or needed an extra cable. Cybdokey was made to be a polished, compact FIDO key with capacative touch support.

Note: bom.csv is the LCSC parts list with working liks, whilst overall-bom.csv is an estimate of the overall project cost

Cybdokey, from the project README — From the project README

Main components on the Cybdokey

RP2354_60QFN MCP1700x-300xxTT USBLC6-2P6

Cybdokey bill of materials (BOM)

34 components, 17 distinct parts — part numbers from the project's BOM.

Qty	Part	Footprint	Refs
1	RP2354_60QFN	RP2350-QFN-60-1EP_7x7_P0.4mm_EP3.4x3.4mm_ThermalVias	U1
1	MCP1700x-300xxTT	SOT-23	U2
1	USBLC6-2P6	SOT-666	U3
1	ABM8-272-T3	Crystal_SMD_Abracon_ABM8G-4Pin_3.2x2.5mm	Y1
1	USB_A	USB_A_PCB_Edge_receptacle	J1
1	1N5819WS	D_SOD-323F	D1
1	LED_RKBG	LED-SMD_4P-L3.2-W2.8_XZMDKCBDDG45S-9	D3
1	3.3u	INDC1608X95N	L1
2	10uF	C_0402_1005Metric_Pad0.74x0.62mm_HandSolder	C1, C2
6	4.7uF	C_0402_1005Metric_Pad0.74x0.62mm_HandSolder	C3, C4, C5, C15, C18, C19
9	100nF	C_0402_1005Metric_Pad0.74x0.62mm_HandSolder	C6, C7, C8, C9, C10, C11, C12, C16 +1
2	27R	R_0402_1005Metric_Pad0.72x0.64mm_HandSolder	R1, R2
1	33R	R_0402_1005Metric_Pad0.72x0.64mm_HandSolder	R3
2	1kR	R_0402_1005Metric_Pad0.72x0.64mm_HandSolder	R4, R6
1	10kR	R_0402_1005Metric_Pad0.72x0.64mm_HandSolder	R5
1	1MR	R_0402_1005Metric_Pad0.72x0.64mm_HandSolder	R7
2	220R	R_0402_1005Metric_Pad0.72x0.64mm_HandSolder	R8, R9

Cybdokey design files

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

Cybdokey: common questions

What microcontroller does the Cybdokey use?

The Cybdokey is built around the RP2354_60QFN, from the RP2040/RP2350 family.

How big is the Cybdokey PCB?

The Cybdokey measures 12 × 46 mm, has 2 copper layers and is 2 mm thick.

How many components are on the Cybdokey?

34 components, from 17 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 Cybdokey design files?

From the Cybdo/cybdokey 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 Cybdokey design in my own project?

The repository has no license, so all rights stay with Cybdo. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Cybdokey 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.