Started working on the electronics portion for this build during the Thanksgiving holidays....
I will add a schematic of how everything is wired after I finish this up hopefully today or tomorrow
The controller will be based of a NetMedia BX24 microcontroller that I had from many years ago. It is a relatively small board at around 1" x 2" and it should be able to handle all the sutff I need it to.
1. PC power control
2. Amp power control
3. Battery voltage detection
4. Serial communication with PC to show data + send commands
5. USB Hub power control
6. Speed output from PCM hookup from ECU
Charger - PC
The eeePC requires 9.5v at 2-3 amps to charge. Unfortunately, there is no readily available chip that provides 9.5v so I decided to use an LT1083 Adjustable Regulator.
USB Hub Power
I was planning on adding a powered hub to the project as the eeePC only has three USB ports which seems a bit insufficient to me. The hub needs 5v at around 2-3 amps. I decided against using a linear voltage regulator as it releases all the extra energy as heat and therefore is very inefficient. I found a LT1529 after a quick search on Google and decided to use it as I had to order the other chip from Linear Technology as well.