2 layers105 × 105 mm
Neopixel
hackclub/OnBoard
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71 parts915
2 layers71 × 25 mm
The USG is Good, not Bad
- Size
- 71 × 25 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 71
- Nets
- 53
- Pads
- 317
- Tracks, vias
- 988, 99
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 4
- Created
- 3 Oct 2015
- Updated
- 6 Jan 2020
Overview
USG is an open-source printed circuit board by robertfisk, from the robertfisk/USG repository on GitHub. It is a 2-layer board of 71 × 25 mm with 71 parts on 53 nets, routed with 988 tracks and 99 vias.
Its parts include 28 capacitors, 16 resistors, 5 ICs, 3 connectors and 2 crystals. It belongs with the STM32 boards of this library.
README
README.mdThe USG is Good, not Bad
The USG is a firewall for your USB ports, protecting your computer from BadUSB. It connects between your computer and your untrusted USB device, isolating the badness and keeping your computer safe.
For more info, hit the Wiki.
v1.0 Firmware
This is the firmware branch for the pre-assembled USG v1.0. If you want to build your own USG out of development boards, clone the v0.9 branch instead.
USG v1.0 hardware
The USG v1.0 is available now from the online store.
Need More Speed?
The USG is performance-limited due to its USB 1 hardware. If you need to transfer large files from flash drives and hard drives, you need the Armadillo instead. Based on the USG's proven open-source technology, the Armadillo is a next-gen device operating at USB 2.0 speed. Available exclusively through the online store.
Parts
71| Qty | Value | Footprint | References |
|---|---|---|---|
| 18 | 0.1u | Capacitors_SMD:C_0603 | C1, C4, C6, C10, C11, C12, C13, C16, C21, C22, C23, C24, C25, C26, C27, C28 +2 |
| 7 | Jumper_NC_Small | USG_footprints:J_NC_0402 | ID_BOARD0, ID_BOARD0, ID_BOARD1, ID_BOARD1, ID_BOARD2, ID_BOARD2, ID_DNST1 |
| 4 | 10k | Resistors_SMD:R_0603 | R4, R6, R11, R13 |
| 4 | 18p | Capacitors_SMD:C_0603 | C2, C3, C17, C18 |
| 4 | 1k | Resistors_SMD:R_0603 | R2, R3, R9, R10 |
| 4 | 22 | Resistors_SMD:R_0603 | R7, R8, R14, R15 |
| 4 | 220 | Resistors_SMD:R_0603 | R1, R5, R12, R16 |
| 4 | 4.7u | Capacitors_SMD:C_0603 | C5, C8, C19, C20 |
| 3 | Jumper_NO_Small | USG_footprints:J_NO_0402 | BOOT_DNST, BOOT_UPST, ID_UPST1 |
| 2 | 8MHz | Crystals:Crystal_HC49-SD_SMD | Y1, Y2 |
| 2 | CONN_02X05 | USG_footprints:Pin_Header_Straight_2x05_Pitch1.27mm | JTAG_DNST, JTAG_UPST |
| 2 | LED | LEDs:LED-0603 | FAULT_DNST, FAULT_UPST |
| 2 | NUP4114 | TO_SOT_Packages_SMD:SC-70-6 | U1, U5 |
| 2 | STM32F401xB | USG_footprints:LQFP-64_10x10mm_Pitch0.5mm | U2, U4 |
| 1 | 10u | Capacitors_SMD:C_0805 | C14 |
| 1 | 22u | Capacitors_SMD:C_0805 | C15 |
| 1 | AZ1117CH-3.3 | TO_SOT_Packages_SMD:SOT-223 | U3 |
| 1 | DOUBLE_DIODE_CCOM | TO_SOT_Packages_SMD:SOT-23 | D1 |
| 1 | SW_PUSH | USG_footprints:SW_TACT | RESET |
| 1 | Symbol_OSHW-Logo_SilkScreen | Symbols:Symbol_OSHW-Logo_SilkScreen | |
| 1 | USB_A_PLUG | USG_footprints:USB_A_PLUG | P1 |
| 1 | USB_A_SOCKET | USG_footprints:USB_A_SOCKET | P2 |
| 1 | USB_OTG | Connect:USB_Micro-B | P3 |
Questions
How big is the USG PCB?
It measures 71 × 25 mm and has 2 copper layers, 1.6 mm thick.
What parts does the USG use?
71 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 USG KiCad files?
From the robertfisk/USG repository on GitHub, at the commit this page was made from: the board is Hardware/USG.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the USG design in my own project?
Its repository states no licence, so its author keeps all rights: ask robertfisk before reusing the design.
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