Raspberry PI Power Shield:

This is the shield developed for powering the Bioscope from a single 3.7V Li-Ion cell.
It provides the Raspberry PI  with 5V for the USB and HDMI, and 3.3V for normal operation. Further it contains a 3rd auxiliary 3.3V supply which can be switched on and off by one of the GPIO pins. The Li-Ion cell can be charged by the shield while still providing power to the Raspberry PI.

Features:

• 5V 800 mA SMPS
• 3.35V 1200 mA SMPS
• 3.3V 1200mA SMPS switchable by GPIO
• Li-Ion CC-CV charger
• thermal regulation while charging
• system side battery monitor: voltage, current, temperature
• 2 white LED PWM channels
• 3-axis accelerometer with programmable interrupt
• auxiliary connector for power, UART, I2C, SPI and several GPIOs
• connector for Greyhill rotary encoder
• connector for ON/OFF switch