Hello Everyone This is One Of Best Project Who Want To Make OWN hardware wallet At low Cost or Make Backup Hardware Wallet .....

Many Thanks To Official pitrezor Dev For Great Software

Here is official Link For All Information ... DIY Guide Tutorial ETC

https://www.pitrezor.com/2018/02/pitrezor-homemade-trezor-bitcoin-wallet.html#Download

Features:

Low cost parts

Easy to build if an existing raspberry pi hat is used

Run on pi zero and pi 4.

Use the original trezor One code. Only a thin layer is used to adapt the code to the raspberry pi Linux platform. 

All code modifications are open source, like the original trezor code.

100% Compatible with trezor web wallet to perform transactions.

Use the hardware random number generator of the raspberry pi for more security.

Can be very secure if you use a pass phrase (see security section below)

Support small OLED display and/or display via HDMI output.

Adjustable display scale factor on HDMI output

Fast boot (around 5 seconds)