Another thing you could try is building dashboards for firms/companies that are plug-able into major databases (Excel also as a "bonus", there are many using Excel as database...).
Most will require your board to hook into their ERP system, which is run by a database. The idea it's not new but existing solutions are over-complicated or expensive.
Build a few templates and run them in browser (HTML 5, Java Scrip, CSS, database connector, and a scripting language), get them to look good/attractive (I know it's not easy, but hey... it's not that difficult either).
I believe most companies will be happy to just invest in a LCD screen, an Android device and your labor - to have the boards displayed on the factory floor or at reception (they can also run presentation slides).
As a bonus you can manage the systems remotely - for servicing after installation or changes, if required (another source of income).
I know that this is not a really "passive" income idea, but if you get passionate about it, I think that it has the potential of turning out nice. I have build one of this boards for my work place, and I am thinking of putting this into action.
Most will require your board to hook into their ERP system, which is run by a database. The idea it's not new but existing solutions are over-complicated or expensive.
Build a few templates and run them in browser (HTML 5, Java Scrip, CSS, database connector, and a scripting language), get them to look good/attractive (I know it's not easy, but hey... it's not that difficult either).
I believe most companies will be happy to just invest in a LCD screen, an Android device and your labor - to have the boards displayed on the factory floor or at reception (they can also run presentation slides).
As a bonus you can manage the systems remotely - for servicing after installation or changes, if required (another source of income).
I know that this is not a really "passive" income idea, but if you get passionate about it, I think that it has the potential of turning out nice. I have build one of this boards for my work place, and I am thinking of putting this into action.