I got an old laptop display that i want to use for my RasPi by using an LCD Display Controller with HDMI out. The controller needs 12V/2A so i will have to use some AC adapter to power it.
Now i'm planning to build a wooden frame for it that can also hold my RasPi (Model 3). To save cables and AC adapters i'd like to use the 12V adapter for the RasPi as well. So i looked around and found this:
DC 7V-24V To DC 5V 3A USB Output Converter Step Down Module KIS3R33S
Now my question is: can i simply split up the cable from my AC adapter and connect it to the display controller and the step down converter? How much power will i need? Is 12V/4A enough? Could i even use 12V/3A?
The advantage of the above converter is that is gives 3A output (4A peak), so plenty enough to power a RasPi 3 and maybe even give supportive power to an external 2,5" hdd. All with a convenient USB plug. So my RasPi GPIO's would be free for any future projects. (And i'ts cheap.)
Another question: Is it OK to use a wooden housing or could the components get too hot (under normal circumstances). Maybe i could take some plastic for the base, build a wooden frame around it and take the display as a cover on top...