4 layers48 × 35 mm
2 layers14.4 × 34.3 mm
YetAnotherAuthKey
0x62b/YetAnotherAuthKeyKiCad 9 format, all of the symbol/footprint libraries should be included in the repo.
- Size
- 14.4 × 34.3 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 31
- Nets
- 53
- Pads
- 141
- Tracks, vias
- 154, 9
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 6 Oct 2025
- Updated
- 11 Nov 2025
Overview
YetAnotherAuthKey is an open-source printed circuit board by 0x62b, from the 0x62b/YetAnotherAuthKey repository on GitHub. It is a 2-layer board of 14.4 × 34.3 mm with 31 parts on 53 nets, routed with 154 tracks and 9 vias.
It is built around the ABM8-272-T3. Its parts include 19 capacitors, 5 resistors, 2 ICs, 1 connector and 1 switch. It belongs with the RP2350 boards of this library.
Main components
1README
README.mdYetAnotherAuthKey
A Raspberry Pi RP2354 based PCB that can be flashed with the pico-fido firmware to act as a security key similar to Yubikey, because Yubikeys are expensive and I'm broke.
Made for Hack Club Blueprint
KiCad 9 format, all of the symbol/footprint libraries should be included in the repo.
RP2350 and related components symbols/footprints were obtained from Raspberry Pi.
LCSC bom (most of these have MOQs)
| Id | Designator | Footprint | Quantity | Designation | LCSC Part Number | Ext Price USD |
|---|---|---|---|---|---|---|
| 1 | C8,C12,C10,C11,C17,C15,C19,C18,C14,C16,C13 | C_0402_1005Metric | 11 | 100n | C1525 | 0.12 |
| 2 | C1,C2 | C_0603_1608Metric | 2 | 10u | C19702 | 0.29 |
| 3 | SW1 | SW_Push_SPST_NO_Alps_SKRK | 1 | SW_Push | C115357 | 0.64 |
| 4 | C6,C9,C7,C5 | C_0402_1005Metric | 4 | 4.7u | C368809 | 0.31 |
| 5 | U2 | SOT-23 | 1 | MCP1700x-330xxTT | C39051 | 1.98 |
| 6 | R3,R2 | R_0402_1005Metric | 2 | 27 | C138021 | 0.07 |
| 7 | Y1 | Crystal_SMD_3225-4Pin_3.2x2.5mm | 1 | ABM8-272-T3 | C20625731 | 1.77 |
| 8 | J1 | USB_A_Molex_48037-2200_Horizontal | 1 | USB_A | C2681564 | 0.65 |
| 9 | L1 | C_0402_1005Metric | 1 | 3.3u | C51412 | 0.9 |
| 10 | R4,R5 | R_0402_1005Metric | 2 | 1k | C106235 | 0.06 |
| 11 | R6 | R_0402_1005Metric | 1 | 33 | C138002 | 0.07 |
| 12 | U1 | RP2350-QFN-60-1EP_7x7_P0.4mm_EP3.4x3.4mm_ThermalVias | 1 | RP2350_60QFN | C41378174 | 2.49 |
| 13 | C3,C4 | C_0402_1005Metric | 2 | 15p | C86285 | 0.29 |
Total: 9.64 USD
PCB: 14.45 mm* 34.35 mm, green soldermask, leadfree HASL - 3.3 USD + 3 USD stencil
Total: 16 USD + shipping
Parts
31| Qty | Value | Footprint | References |
|---|---|---|---|
| 11 | 100n | Capacitor_SMD:C_0402_1005Metric | C8, C10, C11, C12, C13, C14, C15, C16, C17, C18, C19 |
| 4 | 4.7u | Capacitor_SMD:C_0402_1005Metric | C5, C6, C7, C9 |
| 2 | 10u | Capacitor_SMD:C_0603_1608Metric | C1, C2 |
| 2 | 15p | Capacitor_SMD:C_0402_1005Metric | C3, C4 |
| 2 | 1k | Resistor_SMD:R_0402_1005Metric | R4, R5 |
| 2 | 27 | Resistor_SMD:R_0402_1005Metric | R2, R3 |
| 1 | 3.3u | Capacitor_SMD:C_0402_1005Metric | L1 |
| 1 | 33 | Resistor_SMD:R_0402_1005Metric | R6 |
| 1 | ABM8-272-T3 | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | LOGO | LOGO | G*** |
| 1 | MCP1700x-330xxTT | Package_TO_SOT_SMD:SOT-23 | U2 |
| 1 | RP2350_60QFN | RP2350_60QFN_minimal:RP2350-QFN-60-1EP_7x7_P0.4mm_EP3.4x3.4mm_ThermalVias | U1 |
| 1 | SW_Push | Button_Switch_SMD:SW_Push_SPST_NO_Alps_SKRK | SW1 |
| 1 | USB_A | Connector_USB:USB_A_Molex_48037-2200_Horizontal | J1 |
Questions
How big is the YetAnotherAuthKey PCB?
It measures 14.4 × 34.3 mm and has 2 copper layers, 1.6 mm thick.
What parts does the YetAnotherAuthKey use?
31 parts, built around the ABM8-272-T3. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the YetAnotherAuthKey KiCad files?
From the 0x62b/YetAnotherAuthKey repository on GitHub, at the commit this page was made from: the board is pcb/YetAnotherAuthKey.kicad_pcb and its schematic pcb/YetAnotherAuthKey.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the YetAnotherAuthKey design in my own project?
Its repository states no licence, so its author keeps all rights: ask 0x62b before reusing the design.
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