Power Module Rev D Fixes

lab11 / signpost

Exploring what happens when you put computers on sign posts.

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Power Module Rev D Fixes #49

Open nealjack opened 7 years ago

nealjack commented 7 years ago

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

brghena commented 7 years ago

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 commented 7 years ago

[x] 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-.
[x] Battery monitor sense resistor needs to be closer and have better traces to pins
[x] R53 and R13 swap
[x] LTC2943 requires 3.6+V, so backplane/controller gauge won't work

brghena commented 7 years ago

[ ] Think about Load Switches on a per module basis

brghena commented 7 years ago

[ ] WHY IS THE RESET BUTTON SO HARD TO PRESS??