Power Module Rev D Fixes

[nealjack]

• U19 pin 1 indicator
• Better precision resistors for solar charger divider (Input and output regulation)
• More space monitors and sense resistors
• More space around charger/regulators
• U27 wrong package
• D3 wrong package
• Add reset button on watchdog

[brghena]

Before you spin Rev D, it would be good to check if the watchdog firing actually turns off and back on the power rails correctly. (Probably a deadbugged chip and some wires)

[nealjack]

• VSOL- must be connected to VBAT-. Watchdog only shuts off battery connection to ground, solar panel could still power device. Change charger GND connections to VSOL-/VBAT-.
• Battery monitor sense resistor needs to be closer and have better traces to pins
• R53 and R13 swap
• LTC2943 requires 3.6+V, so backplane/controller gauge won't work

[brghena]

• Think about Load Switches on a per module basis

[brghena]

• WHY IS THE RESET BUTTON SO HARD TO PRESS??