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2 layers63.5 × 88.9 mmUSafe, the printed circuit board in 3D
Size
63.5 × 88.9 mm
Copper layers
2
Thickness
1.6 mm
Parts
10
Nets
40
Pads
70
Tracks, vias
96, 0
Routed
Yes
KiCad
KiCad 9.0 (file 20241229)
Created
1 Dec 2025
Updated
6 Dec 2025

Overview

USafe is an open-source printed circuit board by engineerjoe440, from the engineerjoe440/uSafe repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 63.5 × 88.9 mm with 10 parts on 40 nets, routed with 96 tracks and 0 vias.

Its parts include 4 capacitors, 2 connectors, 1 resistor and 1 transistor. It belongs with the RP2040 boards of this library.

README

README.md

uSafe

A simple pin-based lock-box for education.

Bill of Materials

ComponentLink
PS1DigiKey

Parts

10
QtyValueFootprintReferences
24.7uFCapacitor_THT:CP_Radial_Tantal_D5.0mm_P5.00mmC1, C2
1100uFCapacitor_THT:CP_Radial_Tantal_D5.0mm_P5.00mmC3
11nFCapacitor_THT:CP_Radial_Tantal_D5.0mm_P5.00mmC4
1BUZ11Package_TO_SOT_THT:TO-220-3_VerticalQ1
1Conn_01x02_SocketConnector_JST:JST_EH_B2B-EH-A_1x02_P2.50mm_VerticalJ1
1Conn_01x08_PinConnector_JST:JST_EH_B8B-EH-A_1x08_P2.50mm_VerticalJ3
1ITX4824SA-RConverter_DCDC:Converter_DCDC_XP_POWER-ITxxxxxS_THTPS1
1RResistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_HorizontalR1
1RaspberryPi_Pico_WModule:RaspberryPi_Pico_Common_THTA1

Questions

How big is the USafe PCB?

It measures 63.5 × 88.9 mm and has 2 copper layers, 1.6 mm thick.

What parts does the USafe use?

10 parts. 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 USafe KiCad files?

From the engineerjoe440/uSafe repository on GitHub, at the commit this page was made from: the board is hardware/uSafe.kicad_pcb and its schematic hardware/uSafe.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the USafe design in my own project?

Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).

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