Outline slides for DroidCon India 2015 proposal

1. Android, without batteries
Running commercial devices without batteries

2. Motivation
• Android is now the most popular OS
• Android devices have it all
• connectivity, location, processing power & multimedia
• Great choice to make solution centric custom devices
• Making custom devices is expensive!
• What if a common phone/tablet could be used for prototyping ?
• Interested ? This talk shows you how…

3. In this Talk
• A look at batteries
• How battery reporting works
• Changes required for using a power supply
• Demo
• Handling USB devices

4. What’s in a Battery ?
-ve or GND
+ve, aka Vcc (3.7V-4.2V)
Battery Detect
THERM for temperature sensing

5. Android Battery Stack
Kernel
Framework
Application
Fuel Gauge
Battery Charger
Battery
Reporting,
Actions
Higher Level
Decisions

6. Using a Power Supply
• Considerations for power supply
• Always present
• 100% level
• Modify
• Kernel
• Framework

7. Demo

8. USB Peripherals
• Often used in applications
• Supplying power is a problem
• >500 ma?
• Solution : Y cable