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As a first pass, the goal here was to ensure fitment, rough operations, and suss out any issues with the board or design. The goal here is to be a Rev1, for a future Rev2, but confirm the battery charging, load switch, and board fits perfectly with the Raspberry Pi 2W. The board was designed to have a physical cutoff switch, and a holder for a 14550 (AA) sized cell, with a few side mounted LEDs for status, and to mount directly using the top 6 pins to deliver power through the header of RPI 2W. Additionally, the charger was designed such that if the cell began to degrade, or a near-dead cell would be inserted, it would attempt to trickle charge until a safe level was attained and have full battery detection while maintaining full battery, all of which charged over USB. Overall project can be found in this git repo, under the "EE" folder.
As a first pass, the goal here was to ensure fitment, rough operations, and suss out any issues with the board or design. The goal here is to be a Rev1, for a future Rev2, but confirm the battery charging, load switch, and board fits perfectly with the Raspberry Pi 2W. The board was designed to have a physical cutoff switch, and a holder for a 14550 (AA) sized cell, with a few side mounted LEDs for status, and to mount directly using the top 6 pins to deliver power through the header of RPI 2W. Additionally, the charger was designed such that if the cell began to degrade, or a near-dead cell would be inserted, it would attempt to trickle charge until a safe level was attained and have full battery detection while maintaining full battery, all of which charged over USB. Overall project can be found in this git repo, under the "EE" folder.