| Age | Commit message (Collapse) | Author |
|---|
|
This resolves ERC issues. The ERC complains that an power input is not
fed by a power output if there is a component like a ferrite bead or 0
Ohm resistor between the two.
The `PWR_FLAG` tells the ERC that it was explicitly checked that this is
not a mistake.
|
|
|
|
|
|
Now there are 6 locations for 3 zero Ohm resistors. Three places to
power by PoE and three to power externally. Never all of them should be
placed.
|
|
|
|
|
|
|
|
|
|
|
|
Power over Ethernet (PoE) has the disadvantage that GND is significantly
below earth. This requires that GND of a PoE-powered device is never
attached to earthed devices.
In production use cases this is no problem. The earth lines are
isolated.
Nevertheless for debugging it is sometimes useful to connect measuring
equipment like logic analyzers and oscilloscopes to the board. This is
not possible with PoE. Thus an alternative earth-based 5V power input is
useful.
|
|
|
