HardLabs

Snopf

snopf·snopf·hardware/kicad/snopf.kicad_pcb

Snopf PCB layout, top view — open source AVR/Arduino board by snopf

About the Snopf PCB

Snopf is an open source AVR/Arduino PCB design by snopf, published on GitHub under the GPL-2.0 license. It is a 2-layer board measuring 14 × 17.3 mm, with 16 components from 13 distinct parts.

Its main chip is the ATTINY85-20SU, from the AVR/Arduino family. By type, the board carries 5 resistors, 4 capacitors, 3 diodes, 1 IC, 1 crystal and 1 connector.

From the project

snopf USB password token

Snopf is a very simple, yet effective and easy to use USB password tool. The Snopf USB device creates a unique and strong password for every service from the same 256 bit secret which never leaves the token.

Whenever Snopf is plugged into the computer you can make a password request and then the red LED will light up. If you press the button within 10 seconds Snopf will imitate a keyboard and type the password for the requested service.

Snopf, from the project README
From the project README

Main components on the Snopf

ATTINY85-20SU

Snopf bill of materials (BOM)

16 components, 13 distinct parts.

QtyPartRefs
1
ATTINY85-20SU
U1
1
12 MHz
Y1
1
USB_A
J1
1
User Button
SW1
2
Z3,6V
D1, D2
1
User LED
D3
1
4u7
C1
2
18pF
C2, C3
1
100n
C4
1
1k5
R1
2
68R
R2, R3
1
10k
R4
1
220R
R5

Snopf design files

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

Snopf: common questions

What microcontroller does the Snopf use?

The Snopf is built around the ATTINY85-20SU, from the AVR/Arduino family.

How big is the Snopf PCB?

The Snopf measures 14 × 17.3 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Snopf?

16 components, from 13 distinct parts. The full bill of materials is listed on this page.

Where can I download the Snopf design files?

From the snopf/snopf repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Snopf design in my own project?

Yes, under the terms of its GPL-2.0 license, which snopf chose for the repository.

Can I test firmware for the Snopf without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.

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