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[CPM 2p0] +24V rail and PoE radio can't be turned off #212

Description

@Keybinder
  • Affected revision(s): 2p0
  • Affects: schematic, layout
  • Fixed in: N/A
  • Requires firmware changes: NO
  • Requires mechanical changes: NO

Erratum description

The output of the 24V regulator will still be at approximately 12V even when the regulator is disabled by the STM32. This is because of the inductor connecting the two nets which is necessary for the boost regulation.

Image

The Ubiquiti radio will still chug along at 12V so this means we don't have a way of turning it off.

No practical workaround available; we don't really care about being able to switch power to the radio anyway, it's just nice to have.

Permanent fix

Some kind of FET, maybe?

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