Usb sniffer lite

ataradov·usb-sniffer-lite·hardware/usb-sniffer-lite.kicad_pcb

About the Usb sniffer lite PCB

Usb sniffer lite is an open source RP2040/RP2350 PCB design by ataradov, published on GitHub under the BSD-3-Clause license. It is a 2-layer board measuring 43.4 × 18.8 mm, with 38 components from 21 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the SC662K, SPI-FLASH, 12 MHz and FE8.1. By type, the board carries 14 capacitors, 8 resistors, 5 ICs, 4 test points, 3 LEDs and 2 connectors.

From the project

A simple USB sniffer based on Raspberry Pi RP2040

This is a simple USB sniffer based on a Raspberry Pi RP2040. It supports Low Speed and Full Speed modes.

The firmware presents itself as a virtual COM-port (VCP), so no additional software is necessary and it is compatible with all operating systems.

Here are a couple of example capture logs for the enumeration and a regular data transfer.

The compiled binary is available here. Boot RP2040 into the BootROM mode and copy the UF2 file to the drive.

Usb sniffer lite, from the project README — From the project README

Main components on the Usb sniffer lite

SC662K RP2040 SPI-FLASH 12 MHz FE8.1

Usb sniffer lite bill of materials (BOM)

38 components, 21 distinct parts.

Qty	Part	Footprint	Refs
1	SC662K	SOT-23	IC1
1	RP2040	QFN-56-0.4mm	IC2
1	SPI-FLASH	USON-8-3x2mm	IC3
1	12 MHz	CDFN-4-3.2x2.5mm	IC4
1	FE8.1	SSOP-16-0.635mm	IC5
1	USB-C	USB-C	J1
1	USB-A	USB-A-Slots	J2
2	TactSwitch	TactSwitch-6mm-Half-SMD	SW1, SW2
1	SWDIO	TestPoint-1.27mm-Small	TP1
1	SWCLK	TestPoint-1.27mm-Small	TP2
1	RESET	TestPoint-1.27mm-Small	TP3
1	GND	TestPoint-1.27mm-Small	TP4
1	Green	0603	LED1
1	Red	0603	LED2
1	Orange	0603	LED3
5	1uF	0603	C1, C2, C10, C11, C15
9	100nF	0603	C3, C4, C6, C7, C8, C9, C12, C13 +1
2	27	0603	R1, R2
2	5.1K	0603	R3, R4
3	10K	0603	R5, R6, R7

Show 1 more

Qty	Part	Footprint	Refs
1	2.7K	0603	R8

Usb sniffer lite design files

The KiCad project lives in the ataradov/usb-sniffer-lite repository on GitHub; these links point at the commit this page was built from.

Layouthardware/usb-sniffer-lite.kicad_pcb
Schematichardware/usb-sniffer-lite.kicad_sch

Usb sniffer lite: common questions

What microcontroller does the Usb sniffer lite use?

The Usb sniffer lite is built around the RP2040, from the RP2040/RP2350 family.

How big is the Usb sniffer lite PCB?

The Usb sniffer lite measures 43.4 × 18.8 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Usb sniffer lite?

38 components, from 21 distinct parts. The full bill of materials is listed on this page.

Where can I download the Usb sniffer lite design files?

From the ataradov/usb-sniffer-lite repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Usb sniffer lite design in my own project?

Yes, under the terms of its BSD-3-Clause license, which ataradov chose for the repository.

Can I test firmware for the Usb sniffer lite 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.