I worked on a new power delivery system for the Raspberry Pi. Originally I designed this schematic:

power to the pi 1

However I later found a simpler PCB that had all the functionality required.

This is the device we will use:

power to the pi 2


This is the PowerBoost 500 Charger. With a built-in battery charger circuit, it can keep the Pi running even while recharging the battery.

The Raspberry Pi and other boards with low power draw will be powered by a 3.7v PKCELL (or similar) battery. The servos will use a Lithium Polymer battery.

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