No need for detailed instructions. No cutting. Maybe some sanding. Readily available materials.
Step 1: There's Not Much to This...
And I'm really only posting this because a search of the site didn't come up with anything that worked as well as this simple, cheap and easy-to-make tablet stand.
Full credit is deserved by the originator of the stand, seen at their site:
Step 2: Yeah, All I Did Was Add a Tube
...because this stand's primary purpose is to hold my phone or tablet for internet radio and similar apps in my 'radio cave', where I've placed an easy chair, a table, my shortwave radio and my vintage radio turned bluetooth speaker.
A pine rosette
A pine plinth block
glue and/or nails and/or screws
decorative item of your choice
Due to the shape of the decorative part of the plinth block, this easily accomodates my cell phone as well as a 10.1" windows tablet.