Will this work?

[PyGuy]

I have 3 final questions before my final build.

1. Will this work?


2. What's a good long lasting rechargeable battery for the Dreamcast? Like, for 2-3 hours?

3. Will this case be able to hold the Dreamcast motherboard?
http://www.polycase.com/item/ag-85.html" onclick="window.open(this.href);return false;

[bacteria]

Diagram is very crude, buy yes, fine.

You can dispense with the 12v and just us 7.4v / 7.2v Li-ions or Li-Po's; a TI card for 3.3v line (2k resistor) and either a 7805 with a thick heatsink or a second TI card (5v). That way, no PicoPSU and no big batteries for no benefit. Up to you.