Before conducting detailed design (and therefore requirements to modify the case internals or cut components), I wanted to quickly take stock of potential component lists to get an idea of power and space requirements.
I have included a quick power estimate based off these parts too.
Allows the device to connect to power and run via cable, charge and then run off battery when away from a power point.
- LiPo Battery
- Power Boost 1000 Battery Charger / Charge Booster
- Power Connector Breakout
- Raspberry Pi 3
- 580mA max current = 2800mW @ 5V
Receives user input and transmits to RP for use as input. In this case, a Teensy LC configured as a keyboard with button ribbons connected to breakout board.
- Teensy LC
- 20mA max current = 100mW @ 5V
- Ribbon Connector Breakout
Accepts power and visual data and converts into output on display. Display is mounted on case.
- 7″ 800×480 Touchscreen LCD Display with driver backpack (Adafruit)
- 600mA max current = 3000mW @ 5V
Converts audio signal from raspberry Pi into boosted signal appropriate for in build Wii U Gamepad speakers.
- Audio amplifier (ASSUMING NOT REQUIRED FOR NOW)
- Speaker Connector Breakout
Original or copy Wii U Game pad chassis with buttons and speakers to mount components, and house the entire assembly.
- Wii U Gamepad Chassis
Total estimated max power bill at this stage is 5925mW.
Back of a napkin calculation for a reasonably priced 2500mAh 3.7V LiPO battery (9250mWh) is 1.4 hours of play time!
I will have to revisit power after space; either reduce consumption, boost storage or both!