We Generally use Single board computers for different Home and Project Purposes. But do we know the schematics and PCB Layouts? Free and Open Source Hardware like [Olimex](https://www.olimex.com/Products/OLinuXino/open-source-hardware "") gives full freedom to all these schematics and designs.
Debian also have distributions for these arm based machines which makes this whole hardware and software stack fully Free and Open Source.
Let us learn about olimex images based on debian.