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Pip backup

jnthas·pinch·pcb/pip/pip-backup.kicad_pcb

Pip backup PCB layout, top view — open source WCH CH32/CH55x board by jnthas
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About the Pip backup PCB

Pip backup is an open source WCH CH32/CH55x PCB design by jnthas, published on GitHub under the MIT license. It is a 2-layer board measuring 41.9 × 23.9 mm, with 30 components from 17 distinct parts.

Its main chip is the CH552G, from the WCH CH32/CH55x family. Other key parts include the 74HC595 and W25Q32JVSS. By type, the board carries 13 resistors, 6 capacitors, 4 switches, 3 ICs, 1 transistor and 1 connector.

From the project

Password storage for nerds

Pinch is an open-source, personal and portable device capable of storing, retrieving and entering your passwords on demand. It is a physical device with no internet access and only works through manual activation. Pinch is the size of a USB flash drive. It has a USB interface, two buttons and a three digit display which are used to select and confirm the desired password. When confirming, simply put the focus on the password field and the Pinch will enter it for you.

Pip backup, from the project README
From the project README

Main components on the Pip backup

74HC595W25Q32JVSSCH552G

Pip backup bill of materials (BOM)

30 components, 17 distinct parts.

QtyPartRefs
1
74HC595
U1
1
W25Q32JVSS
U2
1
CH552G
U3
1
BC847
Q1
1
USBPCB
J1
1
NET-2531AB-11
DS1
1
FLASH
SW1
1
RESET
SW2
1
BUTTON_A
SW3
1
BUTTON_B
SW4
1
LED
D1
5
0.1uF
C1, C2, C3, C5, C6
1
4.7uF
C4
8
1K
R1, R2, R3, R4, R5, R6, R7, R8
3
10K
R9, R12, R13
1
330R
R10
1
4.7K
R11

Pip backup design files

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

Pip backup: common questions

What microcontroller does the Pip backup use?

The Pip backup is built around the CH552G, from the WCH CH32/CH55x family.

How big is the Pip backup PCB?

The Pip backup measures 41.9 × 23.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Pip backup?

30 components, from 17 distinct parts. The full bill of materials is listed on this page.

Where can I download the Pip backup design files?

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

Can I use the Pip backup design in my own project?

Yes, under the terms of its MIT license, which jnthas chose for the repository.

Can I test firmware for the Pip backup without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug WCH CH32/CH55x firmware against it before you order a PCB.

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