USB/LiPo power supply for a solderless breadboard. Contains a charger with load sharing circuitry, an I2C fuel gauge and a 3.3V buck/boost regulator. Build as prototype for the power block of another project in a useful-ish form factor.

• Charger: MCP73871
• Buck/boost: TPS63021
• Fuel gauge: MAX17043
• Power switch: LTC2955 (since v3)

v1 (Lithium.1.A.1) Tested and mostly working, one jumper needed. On and off buttons not working. (order here)
v2 Jumper no longer needed. Never tested. 
v3 (Lithium.1.A.2) Removed option selection resistors and replaced on/off circuitry with LTC2955. Aug. 4th, 2016: Prototype assembled and basic testing done, fully functional. A few silk sreen errors. (order here)